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Shaffer, Charles Allen. "Women Learning Radiographic Interpretation: A Study of Practical Teaching and Learning /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487935125879947.
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Assis, Afonso Celso Souza de. "Estudo da viabilidade do emprego da técnica de subtração radiográfica digital em radiografias periapicais com registro a posteriori /." São José dos Campos : [s.n.], 2010. http://hdl.handle.net/11449/98003.
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Orientador: Luiz Cesar de Moraes<br>Banca: Pedro Luiz de Carvalho<br>Banca: Cristiane Yumi Koga Ito<br>Resumo: Apesar de ser uma técnica limitada, a subtração digital é utilizada na Odontologia. A adição do computador e seus algoritmos para equalização de contraste e também correção geométrica, tornou possível a aplicação da subtração radiográfica digital (SRD), utilizando radiografias intrabucais. Neste estudo foi avaliada a viabilidade da utilização da subtração radiográfica digital pelo programa Regeemy - Image Registration and Mosaicking v.0.2.43-RCB (DPI-INPE, São José dos Campos, SP, Brazil) em radiografias periapicais digitalizadas e obtidas sem utilização de padronização rígida durante as exposições por meio de registro a posteriori. A seleção dos pontos de controle foram realizadas de forma automática e em quantidade múltipla pelo Reggemy. Esses pontos serviram como coordenadas a partir das quais o programa alinhou o par de imagens e gerou uma terceira imagem de acordo com a projeção geométrica da imagem de referência. Com o uso do Adobe Photoshop© foram selecionados os ROI das imagens utilizando guias e coordenadas. Depois de aplicados os testes estatísticos foi verificado que a metodologia do presente estudo não permite concluir que a subtração utilizando-se o programa Regeemy é inviável quando realizada sem padronização<br>Abstract: The digital subtraction has been widely used in dentistry. The addition of computer and its algorithms for equalization of contrast and geometric correction also made possible the application of radiographic digital subtraction (SRD) using intraoral radiographs. This study assessed the feasibility of using X-ray digital subtraction of the program Regeemy - Image Registration and mosaicking v.0.2.43-RCB (DPI-INPE, Sao Jose dos Campos, SP, Brazil) in periapical radiographs digitized and obtained without the use of standardized rigid during the exposures by registering the event. The selection of control points were performed automatically and in quantity by multiple Reggemy. These points were used as coordinates from which the program aligned the image pair and a third image generated according to the geometrical projection of the reference image. Using Adobe Photoshop ©, we selected the ROI of the images using guides and coordinates. After applying the statistical tests we can conclude that the methodology of this study does not suggest that the subtraction using the program Regeemy is feasible when performed without standardization. It is suggested further studies to evaluate the impact of subtraction radiography with no standardization in clinical diagnosis<br>Mestre
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Assis, Afonso Celso Souza de [UNESP]. "Estudo da viabilidade do emprego da técnica de subtração radiográfica digital em radiografias periapicais com registro a posteriori." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/98003.
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Made available in DSpace on 2014-06-11T19:29:11Z (GMT). No. of bitstreams: 0
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assis_acs_me_sjc.pdf: 596243 bytes, checksum: fb9783652a81f3cb2ec3e7e3c9337fbc (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Apesar de ser uma técnica limitada, a subtração digital é utilizada na Odontologia. A adição do computador e seus algoritmos para equalização de contraste e também correção geométrica, tornou possível a aplicação da subtração radiográfica digital (SRD), utilizando radiografias intrabucais. Neste estudo foi avaliada a viabilidade da utilização da subtração radiográfica digital pelo programa Regeemy – Image Registration and Mosaicking v.0.2.43-RCB (DPI-INPE, São José dos Campos, SP, Brazil) em radiografias periapicais digitalizadas e obtidas sem utilização de padronização rígida durante as exposições por meio de registro a posteriori. A seleção dos pontos de controle foram realizadas de forma automática e em quantidade múltipla pelo Reggemy. Esses pontos serviram como coordenadas a partir das quais o programa alinhou o par de imagens e gerou uma terceira imagem de acordo com a projeção geométrica da imagem de referência. Com o uso do Adobe Photoshop© foram selecionados os ROI das imagens utilizando guias e coordenadas. Depois de aplicados os testes estatísticos foi verificado que a metodologia do presente estudo não permite concluir que a subtração utilizando-se o programa Regeemy é inviável quando realizada sem padronização<br>The digital subtraction has been widely used in dentistry. The addition of computer and its algorithms for equalization of contrast and geometric correction also made possible the application of radiographic digital subtraction (SRD) using intraoral radiographs. This study assessed the feasibility of using X-ray digital subtraction of the program Regeemy - Image Registration and mosaicking v.0.2.43-RCB (DPI-INPE, Sao Jose dos Campos, SP, Brazil) in periapical radiographs digitized and obtained without the use of standardized rigid during the exposures by registering the event. The selection of control points were performed automatically and in quantity by multiple Reggemy. These points were used as coordinates from which the program aligned the image pair and a third image generated according to the geometrical projection of the reference image. Using Adobe Photoshop ©, we selected the ROI of the images using guides and coordinates. After applying the statistical tests we can conclude that the methodology of this study does not suggest that the subtraction using the program Regeemy is feasible when performed without standardization. It is suggested further studies to evaluate the impact of subtraction radiography with no standardization in clinical diagnosis
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Ullman, Gustaf. "Quantifying image quality in diagnostic radiology using simulation of the imaging system and model observers." Doctoral thesis, Linköping : Department of Medicine and Health, Linköping University, 2008. http://www.bibl.liu.se/liupubl/disp/disp2008/med1050s.pdf.
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Malusek, Alexandr. "Calculation of scatter in cone beam CT : Steps towards a virtual tomograph." Doctoral thesis, Linköping : Department of Medical and Health Sciences, Linköping University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11275.
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Dobinson, Stephanie G. "Opinions of radiographer abnormality detection systems in the paediatric setting." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/228749/8/Stephanie_Dobinson_Thesis.pdf.
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Radiographer image interpretation processes at a tertiary paediatric hospital are undergoing a review. This study explored which barriers and positive outcomes radiographers of this facility identified with, in relation to radiographer abnormality detection systems from the literature.
Consistent participation was reported as the barrier most associated with, while self- assessment was deemed the outstanding benefit for radiographers practising a formal radiographer image interpretation system. Associated benefits to self-assessment included improved image interpretation, improved radiographic positioning, and improved image quality stemming from self-assessment.
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LAHMI, MARUANI SIMONE. "Modelisation geometrique et cles de lecture en radiographie dentaire." PARIS 6, DENTAIRE, 1994. http://www.theses.fr/1994PA06H004.
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Walton, Dean R. "Effect of slit scan imaging techniques on image quality on radiotherapy electronic portal imaging." Connect to full text in OhioLINK ETD Center, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=mco1217886133.
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Thesis (M.S.)--University of Toledo, 2008.<br>"In partial fulfillment of the requirements for the degree of Master of Science in Biomedical Sciences." Title from title page of PDF document. Bibliography: pages 67-72.
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Snaith, Beverly. "Development of the radiography evidence base: An examination of advancing practice." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/6314.
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Radiography has seen most development over the last 30 years with the
evolution of new technologies, but perhaps more significantly changes in
education models and radiographer roles. The development of advanced
and consultant posts has facilitated the growth of the profession, although
the evidence base is still evolving.
Through a number of research projects this thesis will explore the growth in
the radiography evidence base with specific reference to the extending role
of the radiographer in image interpretation. Parallel clinical and academic
developments have provided evidence of a scholarly profession which is
slowly establishing its place through publication and a growing research
base.<br>Please Note: The full text of each of the published articles, which are listed on page vii, has been removed from the PhD online copy due to publisher copyright restrictions. Links to the publisher¿s websites are given.
To see the final full text version of the articles listed on page vii, please visit the publisher¿s website. Available access to the published online version may require a subscription.
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Snaith, Beverly Ann. "Development of the radiography evidence base : an examination of advancing practice." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/6314.
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Radiography has seen most development over the last 30 years with the evolution of new technologies, but perhaps more significantly changes in education models and radiographer roles. The development of advanced and consultant posts has facilitated the growth of the profession, although the evidence base is still evolving. Through a number of research projects this thesis will explore the growth in the radiography evidence base with specific reference to the extending role of the radiographer in image interpretation. Parallel clinical and academic developments have provided evidence of a scholarly profession which is slowly establishing its place through publication and a growing research base.
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Neep, Michael J. "The delivery of image interpretation education for radiographers." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/123708/1/Michael_Neep_Thesis.pdf.
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Failure to correctly diagnose fractures on x-rays is an important problem in hospital emergency departments. This thesis included the first randomised controlled trial comparing the effectiveness of intensive and non-intensive formats of delivery of x-ray interpretation education for radiographers. The education was designed to improve the ability of radiographers to detect and describe abnormalities visualised on trauma radiographs. Findings suggest that the intensive format of delivery was more effective, although participants in both trial arms demonstrated improvement. These findings have relevance for healthcare and education providers who are seeking to improve radiographers' image interpretation in emergency settings.
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Piper, K. "Interpretation of clinical imaging examinations by radiographers : a programme of research." Thesis, Canterbury Christ Church University, 2014. http://create.canterbury.ac.uk/13316/.
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Background Studies which have investigated the interpretation of plain skeletal examinations by radiographers have demonstrated encouraging findings, however, the studies have not extended beyond this area of practice and radiographers' diagnostic performance for other more complex investigations has not been established. Comparisons of performance between groups of healthcare practitioners to date, has also been limited. Aim This research programme aimed to investigate the interpretation of clinical imaging examinations by radiographers, and other healthcare practitioners, in the provision of initial interpretations and/or definitive reports of plain imaging ( skeletal and chest) and crosssectional ( magnetic resonance imaging [MRI] – lumbar/thoracic spine, knees and internal auditory meati [IAM]) investigations. Methods The eight studies utilised a variety of methodological approaches and included quasiexperimental and observational studies. One quasi-experimental study compared the performance of radiographers, nurses and junior doctors in initial image interpretation and another similar study included a training intervention; both utilised alternate free-response receiver operating characteristic curve (AFROC) methodology. Three of the observational studies investigated the ability of radiographers to provide definitive reports on a wide range of clinical examinations, including chest and MRI investigations, in a controlled environment. One large multi-centre observational study investigated the performance of radiographers, in clinical practice (A/E: skeletal examinations) during the implementation of a radiographic reporting service. The agreement between consultant radiologists' MRI reports of lumbar/thoracic spine, knee and IAM examinations was investigated in another observational study. The final study compared the reports of trained radiographers and consultant radiologists, with those of an index radiologist, when reporting on MRI examinations of the knee and lumbar spine, as part of a prospective pre-implementation agreement study. Results The first AFROC study demonstrated statistically significant improvements after training, for radiographers (A1=0.55 - 0.72) and nurses (A1=0.65 - 0.63), although the radiographers maintained a better overall performance post training (p=0.004) in providing an initial image interpretation of trauma radiographs of the appendicular skeleton. Radiographers also achieved statistically higher (p<0.01) AUC values (A1=0.75) than nurses (A1=0.58) and junior doctors (A1=0.54) in the second AFROC study. Three studies, which examined 11155 reports, were conducted under controlled conditions in an academic setting and provided evidence of radiographers’ high levels of accuracy in reporting of skeletal A/E (93.9%); skeletal non A/E (92.5%); chest (89.0%); MRI lumbar/thoracic spine (87.2%), knees (86.3%) and IAM (98.4%) examinations. In the multi-centre clinical study, the mean accuracy, sensitivity and specificity rates of the radiographers reports (n=7179) of plain examinations of the skeletal system in the trauma setting was found to be 99%, 98% and 99%, respectively. The considerable range of values for agreement, between consultant radiologists reports of MRI examinations of the thoracic/lumbar spine (k=0 – 0.8), knee (k=0.3 – 0.8) and IAM (k=1.0) was similar to other studies and resulted in a reasonable estimation of the performance, in the UK, of an average non specialist consultant radiologist in MRI reporting. In the final study, radiographers reported in clinical practice conditions, on a prospective random sample of knee and lumbar spine MRI examinations, to a level of agreement comparable with non-musculoskeletal consultant radiologists (Mean difference in observer agreement <1%, p=0.86). Less than 10% of observers' reports (radiographers and consultant radiologists) were found to be sufficiently discordant to be clinically important. Conclusion The outcomes of this research programme demonstrate that radiographers can provide initial interpretations of radiographic examinations of the appendicular skeleton, in the trauma setting, to a higher level of accuracy than A/E practitioners. The findings also provide evidence that selected radiographers with appropriate education and training can provide definitive reports on plain clinical examinations (A/E and non A/E referral sources) of the skeletal system and the chest; and MRI examinations of the knee, lumbar/thoracic spine and IAM to a level of performance comparable to the average non specialist consultant radiologist. Wider implementation of radiographer reporting is therefore indicated and future multi-centre research, including economic evaluations, to further inform practice at a national level, is recommended.
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Oakley, Jason Nathaniel. "An exploration of factors potentially affecting the perception and interpretation of medical images used in higher education." Thesis, University of Portsmouth, 2010. https://researchportal.port.ac.uk/portal/en/theses/an-exploration-of-factors-potentially-affecting-the-perception-and-interpretation-of-medical-images-used-in-higher-education(06ac5642-2e47-41a3-a19c-cdbe566c7575).html.
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Much work is currently being undertaken to explore the impact of varying factors such as compression and image display parameters upon both measurable and perceived image quality in the clinical setting. However, little specific work was found that related to the effect of these factors within Higher Education, where high numbers of students, non-dedicated lecture theatres and a large number and variety of display devices results in many conditions that could impact upon the quality of digital radiographic images. Additionally, the College of Radiographers has identified (2006) that a radiographer comment accompanying radiographs may become a core competency. The aim of this thesis is to present and reflect upon a programme of research undertaken to explore which factors impacted upon students’ summary measures of performance and to begin to establish guidelines to ensure that images are presented optimally to the students, without creating unnecessary work for the academic staff. The effect of differing summary measures was also explored. A series of experiments were undertaken utilising volunteers from an undergraduate radiography programme. Research question The research question was: “What factors might potentially affect the perception and interpretation of medical images used in Higher Education?” Methods A series of six experiments were designed to evaluate the following factors: 1. The effect of compression upon diagnostic accuracy and perceived image quality; 2. The students’ perception of brightness and contrast changes of digital projectional radiographs and the effect of education upon this; 3. The ability of a detailed digital test image to discern limitations of a system; 4. The effect of image size, display device standardisation and image optimisation on summary measures of performance; 5. The ability of students to report consistently from digital test images; 6. The effect of differing marking criteria, confidence scales and summary measures of performance. Results This programme of research demonstrated that for digital projectional appendicular radiographs there was a significant difference between the levels of compression that observers preferred (p<0.05). However, there was no significant difference in accuracy for images reported uncompressed or at lossy levels of 40:1 (JPEG). Higher levels of compression were easily perceived, but low levels were not. It also confirmed other work established that low levels of compression were preferred by the human visual system due to the slight softening effect of the JPEG algorithm. Whilst individuals’ perception of brightness and contrast changes differed, the mean for groups of students was not significantly different and education did not have a significant effect. However, there was a significant difference (p<0.05) between those 30 and under and those over 30 in the level of perceived change, but not in the selection of the last acceptable image. A mid level grey background was shown to reduce perceived error of change compared to black or white backgrounds. Radar plots within this context are proposed as a way of identifying ideal images from students’ responses. Images corrected for the gamma of the system were identified as optimal by the cohorts. Images at 50% resolution stretched to 100%, the standardisation of display devices and image optimisation did not significantly affect student summary measures of performance. However this part of the study lacked power due to fewer participants than was initially anticipated. The summary measure of performance identified as optimal was the area under an AFROC curve, created from a five point category scale. This scale should be used by the observers to categorise their confidence and the marker to rate their confidence based upon the observers’ comments. This will allow a kappa value to be calculated that will give feedback on the level of conveyed confidence. Conclusions This programme of research has identified a number of factors that warrant more detailed research within the field of Higher Education. One is re-evaluating the effect of the year group on the quality factor proposed, as this research seems to indicate that education does have a positive effect on the reporting scores from a digital test image. In addition, there seems to be scope in considering the radar plot as a method of identifying where the ideal image lies. A range of minimum standards, as proven by these experiments and taken from literature, are proposed as the best practice for lecture presentation and assessment. Recommendations are made for further research into the effect of several parameters where power was low. This research has established some of the ground rules for improving the display and assessment of medical images in Higher Education.
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Nataša, Prvulović Bunović. "Дигитална мамографија и томосинтеза у детекцији и радиолошкој БИ РАДС категоризацији туморских лезија дојке". Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2015. http://www.cris.uns.ac.rs/record.jsf?recordId=92756&source=NDLTD&language=en.
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Циљ ове студије је да се упореди дијагностичкa значајност 2Д и 2Д+3Д мамографије у детектовању тумора дојке. Испитивали смо 864 дојки у 740 пацијенткиња. Студија је спроведена у току рутинског рада у Центру за имиџинг дијагностику Институту за онкологију Војводине. 2Д + 3Д мамографија су начињене појединачно или у истом акту снимања као комбо опција на Selenia Dimensions апарату произвођача фирме Холоџик. Радиолошки извешатаји су класификовани у категорије 1-5 према АЦР БИ РAДС-у. Патохистолошка верификација је вршена у свих суспектних промена или у току њиховог праћења . Све пацијенткиње са уредним налазом или мамографски уочених бенигних промена су радиолошки праћене најкраће током 2 године. Уочено је 103 малигне лезије у дојкама класификованих као БИ РАДС 4, 5 на дигиталној мамографији и у 22 дојке чије су промене класификоване као БИ РАДС 1-3, током праћења или прегледа дојки помоћу других модалитета. На 2Д + 3Д мамографији малигните је потврђен у 125 дојке од којих је 118 класификовано као БИ РАДС 4,5 и у 7 дојки чује су промене категорисане у БИРАДС 1-3. Постоји статистички значајна разлика у дистрибуцији малигних налаза у односу на подгрупе Студија је показала 20% лажно негативних налаза на 2Д, а 5,6% на 2Д + 3Д модалитету прегледа дојки. Осетљивост у откривању рака у овој студији износи 82,4% на 2Д и 94,4% на 2Д+3Д методи прегледа, док је специфичност 90,5% и 92,0%, респективно. ППВ је већа за 2Д + 3Д технику прегледа , износи 66,7%, као и негативна предиктивна вредност која износи 99,0%. У 172 случаја (19, 9%) налази 2Д мамографије се не уочавају на 3Д техници прегледа и сматрају се последицом структурне или анатомске „буке“. Већина не -сталних налаза (85%) је класификовано као фокална асиметрија. У овој студији 500 дојки је класификовано према АЦР структури у масне (АЦР 1) или дифузне фибро-гландуларне (АЦР 2), а преосталих 264 је било хетеродензно (АЦР 3) и значајно дензно (АЦР 4). Статистички значајна разлика није показана приликом дистрибуције малигних налаза у поређењу са подгрупама дојки начињеним према њиховој густини - складу са правилима АЦР-а. Укупна тачност теста износи 89,4% за 2Д и 92,4% за 2Д + 3Д мамографију. Предиктивне вредности добијене за 2Д + 3Д мамографију су боље од оних које се односе само на 2Д мамографију, што је резултат њене веће осетљивости и шире могућности карактеризације промена. Варијабилност у интерпретацији налаза међу два радиолога је је ниска, показано је слагање у интершпретавцији евалуираних мамограма у 94.1% случајева.<br>Cilj ove studije je da se uporedi dijagnostička značajnost 2D i 2D+3D mamografije u detektovanju tumora dojke. Ispitivali smo 864 dojki u 740 pacijentkinja. Studija je sprovedena u toku rutinskog rada u Centru za imidžing dijagnostiku Institutu za onkologiju Vojvodine. 2D + 3D mamografija su načinjene pojedinačno ili u istom aktu snimanja kao kombo opcija na Selenia Dimensions aparatu proizvođača firme Holodžik. Radiološki izvešataji su klasifikovani u kategorije 1-5 prema ACR BI RADS-u. Patohistološka verifikacija je vršena u svih suspektnih promena ili u toku njihovog praćenja . Sve pacijentkinje sa urednim nalazom ili mamografski uočenih benignih promena su radiološki praćene najkraće tokom 2 godine. Uočeno je 103 maligne lezije u dojkama klasifikovanih kao BI RADS 4, 5 na digitalnoj mamografiji i u 22 dojke čije su promene klasifikovane kao BI RADS 1-3, tokom praćenja ili pregleda dojki pomoću drugih modaliteta. Na 2D + 3D mamografiji malignite je potvrđen u 125 dojke od kojih je 118 klasifikovano kao BI RADS 4,5 i u 7 dojki čuje su promene kategorisane u BIRADS 1-3. Postoji statistički značajna razlika u distribuciji malignih nalaza u odnosu na podgrupe Studija je pokazala 20% lažno negativnih nalaza na 2D, a 5,6% na 2D + 3D modalitetu pregleda dojki. Osetljivost u otkrivanju raka u ovoj studiji iznosi 82,4% na 2D i 94,4% na 2D+3D metodi pregleda, dok je specifičnost 90,5% i 92,0%, respektivno. PPV je veća za 2D + 3D tehniku pregleda , iznosi 66,7%, kao i negativna prediktivna vrednost koja iznosi 99,0%. U 172 slučaja (19, 9%) nalazi 2D mamografije se ne uočavaju na 3D tehnici pregleda i smatraju se posledicom strukturne ili anatomske „buke“. Većina ne -stalnih nalaza (85%) je klasifikovano kao fokalna asimetrija. U ovoj studiji 500 dojki je klasifikovano prema ACR strukturi u masne (ACR 1) ili difuzne fibro-glandularne (ACR 2), a preostalih 264 je bilo heterodenzno (ACR 3) i značajno denzno (ACR 4). Statistički značajna razlika nije pokazana prilikom distribucije malignih nalaza u poređenju sa podgrupama dojki načinjenim prema njihovoj gustini - skladu sa pravilima ACR-a. Ukupna tačnost testa iznosi 89,4% za 2D i 92,4% za 2D + 3D mamografiju. Prediktivne vrednosti dobijene za 2D + 3D mamografiju su bolje od onih koje se odnose samo na 2D mamografiju, što je rezultat njene veće osetljivosti i šire mogućnosti karakterizacije promena. Varijabilnost u interpretaciji nalaza među dva radiologa je je niska, pokazano je slaganje u interšpretavciji evaluiranih mamograma u 94.1% slučajeva.<br>The aim of this study was to compare diagnostic importance of 2D and 2D+3D diagnostic mammography in breast tumor detection. We evaluated 864 breasts in 740 patients. Study was performed in Diagnostic Imaging Center at Oncology Institute of Vojvodina. 2D+3D mammography were performed during single procedure or via combo option at Selenia Dimensions unit, Hologic, BE. Radiological findings were classified in categories 1-5 according to ACR BIRADS. Pathohistologic verification was obtained in all suspicious findings or after follow up studies. All other patients with mammographic normal findings or benign findings were fallowed up during 2 years period or longer. We detected malignant lesions in 103 breasts classified as BIRADS 4,5 at digital mammography, and in 22 breasts classified as BIRADS 1-3 after followed up or diagnosed by other imaging modalities. At 2D+3D mammography malignancy was confirmed in 125 breasts, 118 classified as BIRADS 4,5 and in 7 breasts classified as BIRADS 1-3. There is statistically significant difference (p<0.001) in distribution of malignant findings compared to the subgroups classified according to 2D mammography. There was 20% false negative findings on 2D, and 5.6% on 2D+3D modality. Sensitivity in cancer detection in this study is 82.4% and 94.4% for 2D and 2D+3D mammography, while specificity is 90.5% and 92.0%, respectively. PPV is higher for 2D+3D technique (66.7%), as well as negative predictive value (99.0%). In 172 cases (19, 9%) 2D mammography findings did not persist on 3D mammography and were considered as structural or anatomical noise. The majority of the non-persistent findings (85%) were classified as asymmetric focal density. In this study 500 breast were classified according to ACR as fatty (ACR 1) or scattered fibroglandular densities (ACR 2), and the remaining 264 had heterogeneously (ACR 3) and extremely dense breasts (ACR 4). Statistically significant difference (p<0.001) was not shown in distribution of malignant findings compared to the subgroups of density structure according to ACR. Overall accuracy of the test was 89.4% and 92.4% for 2D and 2D+3D mammography, respectively. Predictive values obtained in 2D+ 3D mammography are better than those for 2D mammography alone, as a result of its higher sensitivity and better possibility of lesion characterization. Interobserver variability is low, there is an agreement between two radiologist between two radiologic interpretations in 94.1% cases.
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SILVA, Janaína Benfica e. "Avaliação do processo de raparo de lesões periopicais pós-tratamento endodôntico por meio de subtração digital radiográfica." Universidade Federal de Goiás, 2006. http://repositorio.bc.ufg.br/tede/handle/tde/1383.
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Previous issue date: 2006-11-30<br>Control of the process of repair or progression of periapical lesions after endodontic treatment is monitored by conventional or digital radiography. In this research digital subtraction radiography (DSR) was used that uses the subtraction of images longitudinally, in which the change in the alveolar bone is visualized against a uniform gray background. The objectives of this study were: (1) to evaluate the repair process of periapical lesions after endodontic treatment by using DSR; (2) to quantify by means of point/pixel (picture element), area (histogram) and linear measures (profile line), the gain or loss of mineral density in the area of the lesion, using the average of the pixel values; (3) to compare the diagnostic information, suggestive of the repair process, obtained through a subjective evaluation of DSR with a conventional radiographic evaluation and digitalized image and (4) to evaluate the contribution of DSR to an early identification of the repair of periapical lesions after endodontic treatment. The sample consisted of twelve patients with a total of seventeen periapical lesions. The x-rays were digitalized and submitted to DSR using DSR software. The pixel values of the subtracted images were determined by using Image Tool software. Both the conventional x-rays as well as the digitalized and subtracted images were qualitatively evaluated. The results showed a gain in mineral density with a meandp of 133.495.17, 130.275.77 and 129.414.46 for the points/pixel, histogram and profile line tools, respectively. In the evaluation of numerical gain Pearson s Coefficient of Correlation (r) presented these values: mean of points/histogram = 0.746; mean of points/profile line = 0.724 and histogram/profile line = 0.860. When the numerical values were transformed into percentile gain meandp of 0.674.01, 1.214.33 and 1.163.36 were obtained for the points/pixels, histogram and profile line tools, respectively. In the evaluation of the percentile gain Spearman s Coefficient of Correlation (rs) showed the following values: mean of points/histogram = 0.697; mean of the points/profile line = 0.646 and histogram/profile line = 0.844. In the qualitative analysis, the frequency of success in the ordering of the correct sequence of the repair process using conventional radiography, digitalized image and DSR was 37.3%, 31.4% and 31.4%, respectively. One concluded, therefore, that: (1) the process of repair of periapical lesions after endodontic treatment can be evaluated quantitatively by means of longitudinal analysis using DSR; (2) any one of the three tools can be used to quantify the repair, considering that correlation exists between the time of repair and the increase of the value of pixel; (3) the comparative evaluation between the subjective methods using conventional radiography, digitalized image and SDR, it showed that all had been capable to evidence the process of repair of periapical lesions from the first radiography (15 days), not having difference between them and (4) the quantitative evaluation by SDR obtained to after evidence the beginning of the repair with 15 days the beginning of the endodontic treatment, even so this repair was really effective from 105 days after the beginning of the endodontic treatment.<br>O controle do processo de reparo ou progressão de lesões periapicais pós-tratamento endodôntico é monitorado pelo exame radiográfico convencional ou digital. Nesta pesquisa foi utilizada a subtração digital radiográfica (SDR), que utiliza a subtração de imagens longitudinalmente, na qual a mudança no osso alveolar é visualizada contra um plano de fundo (background) cinza homogêneo. Os objetivos desse estudo foram: (1) avaliar o processo de reparo de lesões periapicais pós-tratamento endodôntico por meio de SDR; (2) quantificar por meio de ponto/pixel (picture element), área (histograma) e medida linear (perfil linha) na área da lesão, o ganho ou perda de densidade mineral por meio da média dos valores dos pixels; (3) comparar as informações diagnósticas, sugestivas do processo de reparo, obtidas por meio da avaliação subjetiva da SDR com a avaliação radiográfica convencional e imagem digitalizada; e (4) avaliar a contribuição da SDR na identificação precoce do reparo de lesões periapicais pós-tratamento endodôntico. A amostra constituiu-se de doze indivíduos totalizando dezessete lesões periapicais. As radiografias foram digitalizadas e submetidas à SDR utilizando o programa DSR. As imagens subtraídas tiveram os valores de pixel determinados utilizando o programa Image Tool. Tanto as radiografias convencionais quanto as imagens digitalizadas e subtraídas foram avaliadas qualitativamente. Os resultados evidenciaram ganho de densidade mineral com médiadp de 133,495,17; 130,275,77; 129,414,46 para as ferramentas ponto/pixel; histograma e perfil linha respectivamente. Na avaliação do ganho numérico o Coeficiente de Correlação de Pearson (r) mostrou valores de: média dos pontos/ histograma = 0,746; média dos pontos/ perfil linha = 0,724 e histograma/ perfil linha = 0,860. Quando os valores numéricos foram transformados em ganho percentual foram obtidas médiadp de 0,674,01; 1,214,33; 1,163,36 para as ferramentas ponto/pixel; histograma e perfil linha respectivamente. Na avaliação do ganho percentual o Coeficiente de Correlação de Spearman (rs) mostrou valores de: média dos pontos/ histograma = 0,697; média dos pontos/ perfil linha = 0,646 e histograma/ perfil linha = 0,844. Na análise qualitativa, a freqüência de acertos na ordenação da seqüência correta do processo de reparo usando radiografia convencional, imagem digitalizada e SDR foi de 37,3%; 31,4% e 31,4% respectivamente. Concluiu-se, portanto, que: (1) o processo de reparo de lesões periapicais pós-tratamento endodôntico pode ser avaliado quantitativamente por meio de análise longitudinal com SDR (2) qualquer uma das três ferramentas pode ser utilizada para quantificar o reparo, considerando que existe correlação entre o tempo de reparo e o aumento do valor de pixel; (3) a avaliação comparativa entre os métodos subjetivos, usando radiografia convencional, imagem digitalizada e a SDR, mostrou que todos foram capazes de evidenciar o processo de reparo de lesões periapicais desde a primeira radiografia (15 dias), não havendo diferença entre eles e (4) a avaliação quantitativa por meio de SDR conseguiu evidenciar o início do reparo com 15 dias após o início do tratamento endodôntico, embora esse reparo fosse realmente efetivo a partir de 105 dias após o início do tratamento endodôntico.
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Woznitza, Nick. "The diagnostic accuracy of reporting radiographer chest X-ray interpretations and their influence on clinicians' diagnostic decision-making : a comparison with consultant radiologists." Thesis, Canterbury Christ Church University, 2016. http://create.canterbury.ac.uk/15847/.
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Background: Diagnostic imaging plays an expanding and central role in patients' medical care. Radiographer clinical reporting is being increasingly used in patient focused services. There is a paucity of research that has examined radiographer chest X-ray reporting. Aim: To determine the diagnostic accuracy of reporting radiographer chest X-ray (CXR) reporting and the influence that CXR reports have on clinicians' diagnostic decision-making. Method: A quasi-experimental study determined the diagnostic accuracy of a cohort of reporting radiographers in CXR interpretation, using a free-response methodology. The influence of CXR reports on clinicians' diagnostic decision-making was determined with a cohort study. A non-inferiority approach was used, in line with Royal College of Radiologists and College of Radiographers guidance that reporting radiographers must be comparable to consultant radiologists. Results: The diagnostic accuracy of reporting radiographers (RR) was non-inferior to consultant radiologists (CR) for all measures, all p < 0.0001; unweighted JAFROC (RR Figure of Merit [FoM]=0.828, 95%CI 0.808-0.847; CR FoM=0.788, 95%CI 0.766-0.811), weighted JAFROC (RR FoM=0.830, 95%CI 0.811-0.849; CR FoM=0.786, 95%CI 0.764-0.808) and inferred ROC (RR Area Under the Curve [AUC]=0.909, 95%CI 0.887-0.931; CR AUC=0.903, 95%CI 0.882-0.924). No difference was found in the number of CXR reports that produced a correct most likely and/or most serious diagnosis (RR 876 of 1337 cases; CR 810 of 1368; p=0.103). Uncorrected most likely diagnostic confidence (RR 72.5 to 80.2; CR 71.0 to 80.4) and uncorrected most serious diagnostic confidence (RR 34.0 to 41.9; CR 33.5 to 39.2) of reporting radiographer CXR reports was non-inferior to consultant radiologists (p < 0.001). Corrected most likely diagnostic confidence, calculated using the Tsushima methodology, was lower (RR 4.61; CR 5.02) with no apparent difference, but noninferiority was not confirmed (p > 0.05). Conclusion: With appropriate postgraduate education, reporting radiographers are able to interpret chest X-rays at a level comparable to consultant radiologists.
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Nilsson, Tore. "Simulation supported training in oral radiology : methods and impact on interpretative skill." Doctoral thesis, Umeå : Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1118.
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Squibb, KA. "Australian rural radiographers : radiographic interpretation, communication and disclosure of their radiographic opinion." Thesis, 2013. https://eprints.utas.edu.au/17152/2/Whole-Squibb-thesis-2013.pdf.
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Rural radiographers draw upon informally, experientially acquired knowledge in order to navigate dilemmas and activities that demonstrate complex ethical and social dimensions in their practice. Through an exploration of the social and historical world of the rural radiographer, this thesis generates a substantive theoretical insight into rural radiographers‘ participation in radiographic interpretation, communication with referrers and disclosure of their radiographic opinion to patients, with a specific focus on plain film radiography.
A two phase, exploratory interpretive study was undertaken. The first phase employed a paper based questionnaire and elicited information from Australian rural radiographers that included demographic profile, context and patterns of service delivery. The purpose of the questionnaire was not to draw statistical conclusions about the rural radiographic population, but rather to gather a demographic snapshot of rural radiographers and to determine radiographers‘ involvement in radiographic interpretation, communication and disclosure of their radiographic opinion. To this end the quantitative component of the questionnaire data was analysed using frequency analysis. Consistent with field literature, the questionnaire data demonstrated that radiographers are engaged in radiographic interpretation, communication with referrers and disclosure of their radiographic opinion to their patients.
Emerging findings from the questionnaire provided the foundation for the second stage of the study, interviews with radiographers again providing radiographic services in rural Australia. The thematic analysis of the interview data revealed that, without a clear picture of where they stand medico-legally, rural radiographers draw on an experiential collective of radiographic perception and radiographic interpretation skills as the basis for the complex decisions they make about communication and disclosure of their radiographic opinion. Furthermore, the findings show that the level and method of disclosure chosen by radiographers is governed by the diagnostic, therapeutic and emotional impact this disclosure may have on the patient.
Rural radiography transcends the technical image that dominates the field literature and extends to a more humanistic endeavour: patient welfare is central to the practice world of the rural radiographer. Utilising a social constructionist framework, theoretical explanations of radiographic practices in relation to radiographic interpretation, communication and disclosure were generated. This study shows that rural radiographers‘ construct of their role in patient care extends beyond image acquisition into radiographic image reading, communication and disclosure of their radiographic opinion.
A key finding from this study is that rural radiographers, guided by an ethic of care, navigate a complex interplay of variables as they decide the way in which to convey their radiographic opinion. Radiographers‘ communication of their radiographic opinion with referrers is mediated by the radiographer/referrer game and tends to diagnostic accuracy, but with patients, disclosure is diagnostically vague and may be understood as filtered truth. The way in which rural radiographers convey their radiographic opinion is contextual and informed by experiential knowledge that has evolved through their shared experience of clinical practice in rural settings. This knowledge contributes as equally to an effective outcome for the patient to a radiographic examination as the radiographer‘s technical expertise in image acquisition; it is however not well described in the radiographic literature nor does it seem to be commonly discussed amongst radiographers and their health care colleagues.
The findings from this study indicate that a mismatch in educational preparation, compounded by a lack of professional guidelines and legislative clarity, has led to the ways in which radiographers choose to convey their radiographic opinion. It is important that this implicit and tacit dimension to rural radiographic practice is understood so that it can inform professional, educational and policy decisions relating to radiographers‘ contemporary scope of practice.
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Hardy, Maryann L., and Beverly Snaith. "Radiographer interpretation of trauma radiographs: Issues for radiography education providers." 2009. http://hdl.handle.net/10454/6869.
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Hardy, Maryann L., K. Flintham, Beverly Snaith, and Emily F. Lewis. "The impact of image test bank construction on radiographic interpretation outcomes: A comparison study." 2015. http://hdl.handle.net/10454/7639.
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Assessment of image interpretation competency is commonly undertaken through review of a defined image test bank. Content of these image banks has been criticised for the high percentage of abnormal examinations which contrasts with lower reported incidences of abnormal radiographs in clinical practice. As a result, questions have been raised regarding the influence of prevalence bias on the accuracy of interpretive decision making. This article describes a new and novel approach to the design of musculoskeletal image test banks.
Three manufactured image banks were compiled following a standard academic menu in keeping with previous studies. Three further image test banks were constructed to reflect local clinical workload within a single NHS Trust. Eighteen radiographers, blinded to the method of test bank composition, were randomly assigned 2 test banks to review (1 manufactured, 1 clinical workload). Comparison of interpretive accuracy was undertaken.
Inter-rater agreement was moderate to good for all image banks (manufactured: range k = 0.45–0.68; clinical workload: k = 0.49–0.62). A significant difference in mean radiographer sensitivity was noted between test bank designs (manufactured 87.1%; clinical workload 78.5%; p = 0.040, 95% CI = 0.4–16.8; t = 2.223). Relative parity in radiographer specificity and overall accuracy was observed.
This study confirms the findings of previous research that high abnormality prevalence image banks over-estimate the ability of observers to identify abnormalities. Assessment of interpretive competency using an image bank that reflects local clinical practice is a better approach to accurately establish interpretive competency and the learning development needs of individual practitioners.
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O'Connor, Sonia A., and M. M. Brooks. "X-Radiography of Textiles, Dress and Related Objects." 2009. http://hdl.handle.net/10454/3954.
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No<br>X-radiography of textile objects reveals hidden features as well as unexpected components and materials. This non-destructive technique throws light on construction, manufacturing techniques, use, wear, repair, patterns of decay and dating. X-radiography improves artefact documentation and interpretation as well as guiding conservation approaches by enhancing understanding. This book explores techniques for X-raying textiles. It describes approaches to image interpretation and explains how, through digitisation and digital image manipulation, maximum information can be realised. Case studies include archaeological, ecclesiastical and ethnographic textiles, items of dress and accessories, upholstery, quilts, embroideries, dolls and toys. Museum professionals will find this stimulating book an essential guide for developing their own practice or commissioning textile X-radiographs.
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Hardy, Maryann L., and Christine Barrett. "Interpreting trauma radiographs." 2003. http://hdl.handle.net/10454/17738.
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No<br>Background: Many accident and emergency clinicians regard the radiographic image as an extension of the clinical examination, as a provisional diagnosis, based on clinical signs and symptoms, can be confirmed or refuted by inspection of X-rays. However, the value of radiography in this context is not determined by the actual presence of trauma or pathology on the radiograph, but is dependent on the ability of a clinician to identify any trauma or pathology present. Traditionally, the responsibility for interpreting radiographic images within the accident and emergency environment in the United Kingdom (UK) has been with medical clinicians. However, expansion of the nursing role has begun to change the boundaries of professional practice and now many nurses are both requesting and interpreting trauma radiographs. Aim: To ascertain the ability of accident and emergency doctors and nurses to interpret trauma radiographs, and identify whether there is a consistent standard of interpretive accuracy that could be used as a measure of competence. Methods: A literature review was conducted using the Cochrane Library, Medline and CINAHL databases and the keywords radiographic interpretation, radiographic reporting, accident and emergency and emergency/nurse practitioner. Findings: The ability of accident and nursing doctors and nurses to interpret trauma radiographs accurately varies markedly, and no identified published study has established an appropriate level of accuracy that should be achieved in order to demonstrate satisfactory competence in the interpretation of radiographic images. Conclusions: Determining a measure of interpretive accuracy that can be used to assess ability to interpret radiographic trauma images is fraught with difficulties. Consequently, nurses may attempt to prove their skills by directly comparing their abilities to those of their medical colleagues. However, as a result of marked variation in the ability of senior house officers to interpret trauma radiographs, a similar ability does not automatically imply that a satisfactory level of ability has been achieved.
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Brealey, S., Andy J. Scally, S. Hahn, N. Thomas, C. Godfrey, and A. Coomarasamy. "Accuracy of radiographer plain radiograph reporting in clinical practice: a meta-analysis." 2005. http://hdl.handle.net/10454/6405.
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To determine the accuracy of radiographer plain radiograph reporting in clinical practice.
MATERIALS AND METHODS
Studies were identified from electronic sources and by hand searching journals, personal communication and checking reference lists. Eligible studies assessed radiographers' plain radiograph reporting in clinical practice compared with a reference standard, and provided accuracy data to construct 2×2 contingency tables. Data were extracted on study eligibility and characteristics, quality and accuracy. Summary estimates of sensitivity and specificity and receiver operating characteristic curves were used to pool the accuracy data.
RESULTS
Radiographers compared with a reference standard, report plain radiographs in clinical practice at 92.6% (95% CI: 92.0¿93.2) and 97.7% (95% CI: 97.5¿97.9) sensitivity and specificity, respectively. Studies that compared selectively trained radiographers and radiologists of varying seniority against a reference standard showed no evidence of a difference between radiographer and radiologist reporting accuracy of accident and emergency plain radiographs. Selectively trained radiographers were also found to report such radiographs as accurately as those not solely from accident and emergency, although some variation in reporting accuracy was found for different body areas. Training radiographers improved their accuracy when reporting normal radiographs.
CONCLUSION
This study systematically synthesizes the literature to provide an evidence-base showing that radiographers can accurately report plain radiographs in clinical practice.
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Alves, Stefan Ferreira. "Radiografia-X de pintura : fundamentos radiológicos, parâmetros radiográficos e potencialidades interpretativas." Master's thesis, 2015. http://hdl.handle.net/10400.14/23670.
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Este estudo visa o desenvolvimento do conhecimento sobre radiografia-X aplicado a pintura,
com enfoque em pintura de cavalete, sobre madeira e sobre tela.
É traçada uma perspetiva histórica, desde a descoberta dos raios X por Wilhelm Röntgen,
passando pelo impacto consequente em termos radiológicos e radiográficos, até à sua
implementação no campo das obras de arte.
Descrevem-se os fundamentos radiológicos implicados neste tipo de exame, naquilo que é a
natureza da radiação eletromagnética, o modo como são produzidos os raios X e os
fenómenos que decorrem da sua interação com a matéria.
São avaliados todos os fatores radiográficos no que respeita à natureza da radiação, aos
parâmetros instrumentais, aos geometrismos de posicionamentos ou à inclusão de estruturas
adicionais, e a descrição sistematizada do seu impacto na qualidade da imagem, quer no
suporte analógico de película, quer na sua vertente digital.
Na componente de leitura dos dados obtidos, é delineada uma metodologia específica de
interpretação de imagem, sendo descritos e explorados casos concretos de estudo que ilustram
a capacidade de fornecimento de novas informações, em pintura de cavalete, deste exame de
área não destrutivo.<br>This study aims to develop the knowledge about the application of X-radiographs to easel
painting, focusing on those with wood and canvas supports.
An historical perspective is drawn, from the discovery of X-rays by Wilhelm Röntgen,
through the following radiological and radiographic impact, to the implementation in the field
of art works.
It is described the radiological basis involved in this type of examination, concerning the
nature of electromagnetic radiation, the way X-rays are produced and the resultant
phenomena of its interaction with matter.
Every radiographic factor is evaluated such as the nature of the radiation, the instrumental
parameters, geometrical and placements issues or the inclusion of additional structures, and
then proceed to the systematic description of its impact on image quality, whether in analogic
film, as on digital support.
In the reading component of the data, it is outlined a specific methodology of image
interpretation, being described and explored specific case studies that illustrate the ability to
supply new information on easel painting, by this non-destructive exam.
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"Quantitative ultrasonography in regional anesthesia." Thesis, 2009. http://library.cuhk.edu.hk/record=b6075528.
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Li, Xiang.<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2009.<br>Includes bibliographical references (leaves 161-184).<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Abstract and appendix also in Chinese.
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Brealey, S., and Andy J. Scally. "Methodological approaches to evaluating the practice of radiographers¿ interpretation of images: A review." 2008. http://hdl.handle.net/10454/5675.
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Recent initiatives to modernise the National Health Service describe how improving pay structures and staff working lives can be achieved in the form of advanced practitioner and consultant posts. Role development in Radiography represents a fundamental change to professional practice of radiographers and is subject to the provisions of the statutory and professional codes of conduct which govern such practice. In Diagnostic Radiography the response to Government initiatives has led to a change in practice so that radiographers in these new posts provide reports for a variety of imaging modalities. At the same time as there have been changes in the practice of Radiography, the discipline of evidence-based medicine has emerged. Changes in clinical practice should be underpinned by evidence from research. The purpose of this paper is to discuss the methodological approaches used to conduct research that evaluates one of the most salient areas of development in Radiography practice, that is the role of radiographers as advanced or consultant practitioners when interpreting plain radiographs. We begin by discussing what an evaluation is and two broad approaches for conducting health services research, and then appraise the evidence about radiographer reporting in the context of these methods of evaluation. We then suggest future considerations about the methodological approaches to evaluating radiographer reporting practice and identify where there are evidence gaps and the need for further research to inform evidence-based Radiography.
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O'Connor, Sonia A., and T. P. O'Connor. "Digitising and Image-Processing of Radiographs to Enhance Interpretation in Avian Palaeopathology." 2005. http://hdl.handle.net/10454/3636.
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No<br>Although the study of palaeopathology is less developed for avian bones than for human or other vertebrate remains, skeletal pathologies have been noted in the bones of a range of bird species of all periods, from many parts of the world. Such studies make use of x-radiographs as an aid to differential diagnosis, to image features of the pathology that may not be apparent to the unassisted eye. Bird bones are often thin yet highly mineralised, and offer a particular challenge to the radiographer. Conventional medical or veterinary radiographic techniques are not optimal for ancient material, yet are commonly applied. Here we show that the quality of the x-ray image can be greatly enhanced by applying quite simple techniques. Furthermore, digitisation of the x-radiograph allows commercially available image manipulation software to be used to add further enhancement and to explore specific details of the image. We demonstrate the use of these techniques in the investigation of a number of avian palaeopathology specimens.
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Snaith, Beverly, Maryann L. Hardy, and Emily F. Lewis. "Reducing image interpretation errors – Do communication strategies undermine this?" 2014. http://hdl.handle.net/10454/7359.
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No<br>Errors in the interpretation of diagnostic images in the emergency department are a persistent problem internationally. To address this issue, a number of risk reduction strategies have been suggested but only radiographer abnormality detection schemes (RADS) have been widely implemented in the UK. This study considers the variation in RADS operation and communication in light of technological advances and changes in service operation.
A postal survey of all NHS hospitals operating either an Emergency Department or Minor Injury Unit and a diagnostic imaging (radiology) department (n = 510) was undertaken between July and August 2011. The questionnaire was designed to elicit information on emergency service provision and details of RADS.
325 questionnaires were returned (n = 325/510; 63.7%). The majority of sites (n = 288/325; 88.6%) operated a RADS with the majority (n = 227/288; 78.8%) employing a visual ‘flagging’ system as the only method of communication although symbols used were inconsistent and contradictory across sites. 61 sites communicated radiographer findings through a written proforma (paper or electronic) but this was run in conjunction with a flagging system at 50 sites. The majority of sites did not have guidance on the scope or operation of the ‘flagging’ or written communication system in use.
RADS is an established clinical intervention to reduce errors in diagnostic image interpretation within the emergency setting. The lack of standardisation in communication processes and practices alongside the rapid adoption of technology has increased the potential for error and miscommunication.
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Snaith, Beverly, R. C. Milner, and Martine A. Harris. "Beyond image interpretation: Capturing the impact of radiographer advanced practice through activity diaries." 2016. http://hdl.handle.net/10454/15691.
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No<br>There is limited evidence of the impact of radiographers working in advanced roles beyond task substitution. This study reviews the contribution of advanced (and consultant) practitioner radiographers to service delivery whilst reporting radiographs and demonstrates the impact this has on patients and staff, both internal and external to the imaging department.
The study was a prospective exploratory study using activity diaries to allow interval sampling when individuals were rostered to report. Data was coded using a compiled list of activities and recorded in 15-min intervals over the period of one week. Thirteen radiographers who independently report radiographs participated across 6 locations in a busy multisite English National Health Service (NHS) Trust.
Radiographers reported the majority of the examinations during the study period (n = 4512/5671; 79.6%). The total number of coded activities recorded over the study period was 1527, equating to 380.5 relative hours. The majority of available time was spent reporting, including dictating and verifying the reports of colleagues or trainees, although 69.5% of reporting time was interrupted. Based upon the hours of reporting there was an average of 19.3 reports (patient episodes) produced per hour. Direct patient care tasks and support for staff in decision making were regularly documented. Supplementary tasks included administrative activity, amendments to rotas, preparing presentations and documenting incidents identified during reporting.
This study has demonstrated the breadth and complexity of the activities performed by advanced practice radiographers. The findings confirm their role in supporting service delivery beyond image interpretation.
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Delantoni, Antigoni. "Digital dental radiographs : influence of image quality and software manipulation on their interpretation." Thesis, 2002. http://hdl.handle.net/2429/12022.
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With the technologic advances in digital systems there has been a development
in the field of digital imaging. Systems have developed that allow us to take
radiographs with a reduced patient exposure and higher convenience compared
to conventional film. In many cases the information is electronically transferred
either to get a second opinion or to share information. We need to know to what
extent there is significant information loss with digital systems. It is therefore
useful to compare the image quality of digital systems to conventional film.
The aim of this study was to evaluate the amount of diagnostic information loss
during the scanning of conventional radiographs by comparing images of
different qualities for periodontal defects. Radiographs were taken and scanned
at different resolutions (600,300,150 and 75dpi). A visual analog scale was used
for the subjective assessment of image quality. Observers were asked to mark
points on the selected images. Analysis of Variance was used to demonstrate
significant differences.
From the results we obtained from our data, no significant differences were found
between the resolutions of 600 and 300 dpi, while there were differences
between low quality images (75 dpi) and the higher ones. We drew conclusions
as to whether there is significant amount of information loss during the scanning
of radiographs in cases of periodontal defects.
In addition to the periodontal model, further study on image manipulation by
blurring was done using an endodontic model, and the subjective and objective
performances and measurements of the observers were compared. The feature
of blurring was selected since it is a feature present in Microsoft PowerPoint and
no studies had been done on it in the past. The images were blurred using a
blurring feature provided by software by the NIH image, and a comparison was
made between blurred and non-blurred images for good and poor quality images.
Differences were found in the points' distribution and the measurements between
the two features. We concluded that blurring worsens good quality images, while
poor quality images are improved.
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Brealey, S., Andy J. Scally, and N. Thomas. "Presence of bias in radiographer plain film reading performance studies." 2002. http://hdl.handle.net/10454/6416.
Full textAbstract:
Purpose To raise awareness of the frequency of bias that can affect the quality of radiographer plain film reading performance studies.
Methods Studies that assessed radiographer(s) plain film reading performance were located by searching electronic databases and grey literature, hand-searching journals, personal communication and scanning reference lists. Thirty studies were judged eligible from all data sources.
Results A one-way analysis of variance (ANOVA) demonstrates no statistically significant difference (P=0.25) in the mean proportion of biases present from diagnostic accuracy (0.37), performance (0.42) and outcome (0.44) study designs. Pearson¿s correlation coefficient showed no statistically significant linear association between the proportion of biases present for the three different study designs and the year that the study was performed. The frequency of biases in film and observer selection and application of the reference standard was quite low. In contrast, many biases were present concerning independence of film reporting and comparison of reports for concordance.
Conclusions The findings indicate variation in the presence of bias in radiographer plain film reading performance studies. The careful consideration of bias is an essential component of study quality and hence the validity of the evidence-base used to underpin radiographic reporting policy.
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Harcus, J. W., and Beverly Snaith. "Expanding training capacity for radiographer reporting using simulation: Evaluation of a pilot academy project." 2019. http://hdl.handle.net/10454/17163.
Full textAbstract:
Yes<br>Introduction:
Whilst there is increasing demand on radiology services in the UK, pressures are restricting the expansion of the multi-professional workforce. A pilot academy for radiography reporting was established to augment the traditional university and clinical education in a simulated environment using focussed teaching and real image worklists in a dedicated environment away from departments.
Methods:
Located at a facility to replicate the clinical reporting environment, the emphasis of the nine-month pilot was to provide extensive ‘hands-on’ training to eight trainees. Evaluation of the academy was undertaken through focus groups, telephone interviews, and online surveys to consider the experiences of the trainees and their managers and mentors.
Results:
There was overwhelming support for the academy from trainees, mentors, and managers. Key benefits included relieving pressures on department and mentors; providing an intense, structured, and safe environment to learn; and, perhaps most importantly, an extensive and cohesive peer-support network. Issues identified included conflict within departments due to differences in reporting style and the need for greater collaboration between the university, academy, and departments.
Conclusion:
The use of simulation in education is widely researched, however, there are a number of key factors that need to be considered when implementing it into practise. Peer-support and reflection is seen as essential for its success. Extensive dedicated time to focus on reporting alongside peers can support the development of these skills away from the clinical environment and as such can reduce pressure on service delivery and positively influence learner outcomes.<br>The pilot academy received funding from the NHS Vanguard scheme (Working Together NHS Vanguard) for purchase of equipment and the salaries of the clinical educator (pro-rata). The university fees and backfill payments were funded by Health Education England.
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Snaith, Beverly, and Maryann L. Hardy. "Emergency department image interpretation accuracy: The influence of immediate reporting by radiology." 2014. http://hdl.handle.net/10454/7358.
Full textAbstract:
No<br>The misinterpretation of radiographs is recognised as a key source of emergency department (ED) errors, regardless of clinician profession. This article compares ENP and medical staff accuracy in the interpretation of musculoskeletal trauma X-rays between immediate and delayed radiology reporting pathways.
The data for this study was drawn from a larger pragmatic randomized controlled trial of immediate reporting. Patients were recruited and randomly assigned to immediate or delayed reporting arms and treated according to group assignment. Image interpretive accuracy between ED staff groups and arms was undertaken together with an assessment of the influence of immediate reporting on patient pathways and journey times.
Six hundred and seventy-four radiographic examinations were performed (598 patients). There was a significant reduction in the interpretive errors in the immediate reporting arm for all ED clinicians (proportional difference = 4.2%; 95% CI [0.017,0.068]; p = 0.001), but no significant difference in proportion of interpretive errors was evident between ENPs and medical staff. Patient journey times, discharge and referral rates were not significantly different between study arms, although admission rates varied for medical staff collectively.
ENP X-ray interpretation accuracy is comparable with that of medical staff, but immediate reporting was seen to reduce errors without increasing patient journey times.
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Gqweta, Ntokozo. "Knowledge, skills and perceptions of diagnostic radiographers on image interpretation of chest diseases in eThekwini public hospitals." Thesis, 2014. http://hdl.handle.net/10321/1003.
Full textAbstract:
Submitted in fulfilment of the requirements of the Master's Degree in Technology: Radiography, Durban University of Technology, 2013.<br>ABSTRACT
Escalating current healthcare needs coupled with the dire shortage of radiologists created a climate in countries abroad to extend the role of the radiographer (Williams 2006). The South African radiography profession demonstrates similar if not worse challenges within the radiology services (Gqweta 2012). The human resource needs in the healthcare sector creates a gap in the provision of radiology services (Brandt et al 2007). Often under these circumstances radiographers are asked by emergency department's personnel to comment on radiographic appearances (Hardy and Snaith 2007). Radiographers do provide opinions in order to facilitate patient management (Gqweta 2012). Since the chest x-ray is the most commonly performed x-ray examination in x-ray departments (Manning, Leach and Bunting, 2000), it is assumed that most requests for an opinion may be directed for the clarification of this x-ray examination. Therefore radiographers need to have an in-depth understanding of the knowledge and skills related to the identification of patterns on chest images. The aim of the study was to establish and describe the current chest image interpretation skills, knowledge and perceptions of diagnostic radiographers in eThekwini Health District of KwaZulu-Natal (KZN) with regard to image interpretation.
METHOD:
A quantitative study using a descriptive design with a qualitative aspect using an interpretive design was employed. A simple random sample of hospitals within the eThekwini health district that have x-ray departments was drawn. All diagnostic radiographers that met the inclusion criteria from within these hospitals were invited to partake in the study and all were registered with the Health Profession Council of South Africa (HPCSA). A questionnaire was utilised to collect data on the perceptions and knowledge of diagnostic radiographers on radiographic appearances. A reporting template was provided for the respondents to report on ten (10) chest images and to standardise responses . Accuracy , specificity and sensitivity measurements were utilised to determine the image interpretation knowledge and skills of radiographers without formal training on image interpretation. The SPSS (Statistical Package for the Social Sciences) version 21 was utilised for the raw data capture and analysis.
RESULTS
Forty two (42) radiographers participated in the study. Almost half (46%) of the respondents were chief radiographers and twenty four point four percent (24.4%) of the respondents were senior radiographers . X-ray department managers and community service radiographers each had twelve (12%) percent representation. The majority of the respondents frequently performed chest x-rays. Furthermore they regularly observe Pulmonary Tuberculosis (PTB) abnormal patterns more than those of pneumonia and lung cancer on chest radiographs. The respondents indicated that there is a need for them to extend their roles to include
image interpretation. This will ensure that radiographers are responsive to current health care needs perpetuated by the absence of radiologists and the ever rapidly increasing population. The majority of the respondents were able to identify abnormal appearances on the radiographs (high sensitivity). However there was a proportional decrease on the identification and recognition of the normal appearances (specificity). There was no respondent that obtained a mark of eighty (80%) on the image interpretation knowledge assessment section.
CONCLUSION
Radiographers are able to identify abnormal patterns on chest images. However they are unable to adequately exclude an abnormality (low specificity). Furthermore they lack the ability to adequately describe abnormal radiographic/radio logical appearances. The image interpretation knowledge base of radiographers is limited and specific. Therefore there is a need for an intensive education and training for prospective reporting radiographers.
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Mhiri, Salma Nadia. "Développement de tests mesurant les habiletés de perception et d'interprétation des radiographies pulmonaires." Thèse, 2008. http://hdl.handle.net/1866/8230.
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Scally, Andy J., and S. Brealey. "Confidence Intervals and Sample Size Calculations for Studies of Film-reading Performance." 2003. http://hdl.handle.net/10454/6413.
Full textAbstract:
The relaxation of restrictions on the type of professions that can report films has resulted in radiographers and other healthcare professionals becoming increasingly involved in image interpretation in areas such as mammography, ultrasound and plain-film radiography. Little attention, however, has been given to sample size determinations concerning film-reading performance characteristics such as sensitivity, specificity and accuracy. Illustrated with hypothetical examples, this paper begins by considering standard errors and confidence intervals for performance characteristics and then discusses methods for determining sample size for studies of film-reading performance. Used appropriately, these approaches should result in studies that produce estimates of film-reading performance with adequate precision and enable investigators to optimize the sample size in their studies for the question they seek to answer.
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"Computational techniques for statistical morphometric analysis of 3-D MRI data of human skull and brain." Thesis, 2008. http://library.cuhk.edu.hk/record=b6074676.
Full textAbstract:
Shi, Lin.<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2008.<br>Includes bibliographical references (leaves 171-185).<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Abstracts in English and Chinese.
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Pérez, Luis A. "Interpretation of the residual ridge with clinical or radiographical techniques a comparitive study : a thesis submitted in partial fulfillment ... for the degree of Master of Science (School of Dentistry) ... /." 2001. http://catalog.hathitrust.org/api/volumes/oclc/68962582.html.
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