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Dissertations / Theses on the topic 'Radiography'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Davidson, Robert Andrew. "Radiographic contrast-enhancement masks in digital radiography." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1932.

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Radiographic film/screen (F/S) images have a narrow latitude or dynamic range. The film’s ability to record and view all the anatomy within the x-ray field is limited by this narrow dynamic range. The advent of digital radiographic means of storing and displaying radiographic images has improved the ability to record and visualise all of the anatomy. The problem still exists in digital radiography (DR) when radiographic examinations of certain anatomical regions are undertaken. In this work, the value of anatomically shaped radiographic contrast-enhancement masks (RCMs) in improving image cont

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2

Davidson, Robert Andrew. "Radiographic contrast-enhancement masks in digital radiography." University of Sydney, 2006. http://hdl.handle.net/2123/1932.

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Doctor of Philosophy<br>Radiographic film/screen (F/S) images have a narrow latitude or dynamic range. The film’s ability to record and view all the anatomy within the x-ray field is limited by this narrow dynamic range. The advent of digital radiographic means of storing and displaying radiographic images has improved the ability to record and visualise all of the anatomy. The problem still exists in digital radiography (DR) when radiographic examinations of certain anatomical regions are undertaken. In this work, the value of anatomically shaped radiographic contrast-enhancement masks (RCMs)

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3

Hayre, Christopher Maverick. "Radiography observed : an ethnographic study exploring contemporary radiographic practice." Thesis, Canterbury Christ Church University, 2016. http://create.canterbury.ac.uk/14517/.

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This study explores the day-to-day application of digital radiography (DR) within the X-ray environment. This study presents the voices of the radiographers' untold views, attitudes and experiences of DR through the process of observing, listening, retelling and interpreting junior and senior radiographers' responses. There were three stages to this ethnographic study. Firstly, exploring 'what radiographers did' environment by observing clinical practices. This provided 'first-hand' experience of action-in-process. Secondly, 22 semi-structured interviews were undertaken, directed by emerging t

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4

Jackson, Marcus Thomas. "Conceptualising radiography knowledge and the role of radiography educators : perspectives and experiences of a radiography education community." Thesis, Kingston University, 2013. http://eprints.kingston.ac.uk/27737/.

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The diagnostic radiography curriculum and the process of its enactment are under researched in the United Kingdom. To date, there have been no published studies which have investigated the curriculum and the role of radiography educators from the multiple perspectives of radiography students, university radiography educators and clinical radiography educators, that is, a radiography education community. Accordingly, this study describes the perceptions and experiences of a radiography education community in relation to three research questions: 1. How does a radiography education community con

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5

Grantham, Stephen Gary. "Digital speckle radiography." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619648.

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6

Polinsky, Adam S. "Evaluation and Comparison of Periapical Healing Using Periapical Films and Cone Beam Computed Tomography: Post-Treatment Follow Up." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5767.

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Purpose: The purpose of this study was to assess the radiographic changes in periapical status and analysis of healing determined using periapical radiographs (PA) versus cone beam computed tomography (CBCT) pre-operatively and at 3-64 months following endodontic treatment. Methods: Pre/post treatment radiograph and CBCT scans of patients who had NSRCT, NSReTx, or SRCT from July 2011-December 2018 at VCU Graduate Endodontic clinic were included in this study. Volumetric and linear measurements of periapical lesions on initial and recall PA and CBCT images were performed using three calibrated

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7

Irvine, Michael Alan, and thebovus@yahoo com. "Image Quality and Radiation Dose Comparison of a Computed Radiography System and an Amorphous Silicon Flat Panel System in Paediatric Radiography: A Phantom Study." RMIT University. Applied Sciences, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091019.122013.

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This purpose of this work was to investigate the patient radiation doses and image quality of a Philips/Agfa computed radiographic (CR) system and a Philips indirect-capture digital radiographic (DR) system in a paediatric setting. A CDRAD digital radiographic contrast-detail phantom was used to assess radiographic image quality. Perspex slabs of three different thicknesses (6, 11 and 16 cm) were used to simulate paediatric patients of three arbitrary ages. These phantoms, in conjunction with the CDRAD digital radiographic contrast-detail phantom, were imaged under three different conditions

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8

Pascoal, Ana Isabel Lourenco. "Optimisation of image quality and patient dose for chest radiography with digital radiographic systems." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438195.

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9

Tomko, Craig. "Studies in Dental Radiography." Thesis, Faculty of Dentistry, 1985. http://hdl.handle.net/2123/4278.

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10

Verhovsek, Ester L. "Radiography Curriculum Change Update: American Society of Radiologic Technologists." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etsu-works/2591.

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11

Orafi, Ibtesam. "Aspects of radiography in endodontics." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506238.

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In this thesis, the use of radiography in endodontic practice and the importance of radiographic interpretation of periapical lesion, file and working length, and the second mesio-buccal canal (MB2) of maxillary first molar were studied. The aims of the questionnaire study were primarily to evaluate the opinions and attitudes of general dental practitioners (GDPs) and endodontists in the UK towards the use of radiography and radiographic equipments in endodontic practice. The second aim was to investigate the ability of endodontists and GDPs to interpret early apical pathology. The impact of v

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12

Klein, Dennis William. "Low fluence neutron radiography techniques." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42613.

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13

Venter, Dalene. "Three-dimensional thinking in radiography." Thesis, Cape Peninsula University of Technology, 2008. http://hdl.handle.net/20.500.11838/1564.

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Dissertation submitted in fulfilment of the requirements for the degree Master of Technology: Radiography in the Faculty of Health and Wellness Sciences, 2008<br>Introduction Research to date has not been able to agree whether spatial abilities can be developed by practice. According to some researchers spatial ability is an inherited cognitive ability, compared to spatial skills that are task specific and can be acquired through formal training. It is commonly assumed that radiographers require general cognitive spatial abilities to interpret complex radiographic images. This research was con

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14

Packer, McKay Barlow. "Comparison of treatment planning decisions when combining CBCT and digital radiography verses digital radiography alone." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4140.

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Cone beam computed tomography (CBCT) is the recommended imaging modality of choice for evaluating previous endodontic treatment (1). The aim of this study was to compare treatment planning decisions made when evaluating previous endodontic treatment to determine if treatment planned and projected prognosis differs when digital radiography is used alone or in combination with CBCT. A retrospective chart review was conducted. Patients for whom a CBCT was taken were included in the study. Twenty-eight patients qualified. Patient’s periapical digital radiographs (Dexis©) were evaluated by 2 calib

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15

Johnson, Kennita A. "Quantifying computed radiography (CR) and digital radiography (DR) image quality and patient dose for pediatric radiology." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001030.

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16

Jannetta, Adrian. "Advanced deconvolution techniques and medical radiography." Thesis, Northumbria University, 2005. http://nrl.northumbria.ac.uk/164/.

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Medical radiography is a process by which the internal structures of the human body are imaged using a source of x-rays. The images formed are essentially shadowgrams whose size and intensity is dependent on the geometry of the imaging system and the degree to which the structures attenuate x-ray radiation. The images are blurred because the x-ray source has a finite size, and noisy because the x-ray exposure must be kept as low as possible for the safety of the patient but which also limits the number of photons available for image formation. In such noisy environments traditional methods of

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17

Wojcik, Randolph Frank. "Dual energy scanning beam X -radiography." W&M ScholarWorks, 2004. https://scholarworks.wm.edu/etd/1539623461.

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Dual energy X-radiography is a method first developed in the mid-1970's by which one uses the information contained in the energy spectrum of the transmitted X-ray flux through an object. With this information one can distinguish the types of materials present in a radiograph and thus allow a computer to subtract them from the image enhancing the contrast of the remaining materials. Using this method, one can see details, which would have been hidden by overlying structures of other materials such as seen in radiographs of parts, made up of mixtures of metals and composites. There is also grea

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18

Xiao, Xinhua. "Automated Defect Recognition in Digital Radiography." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439309683.

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19

Dawson, Martin Nicholas. "Applications of neutron radiography & tomography." Thesis, University of Leeds, 2008. http://etheses.whiterose.ac.uk/1641/.

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This thesis represents the investigation and development of neutron imaging techniques as a versatile method that can be used to reveal the presence, position, size, morphology, and chemical composition of structures and materials within a sample. The underlying physics of neutron radiography and tomography mean that it has fundamental similarities to x-ray techniques, although some subtle differences mean that neutrons are often applicable in circumstances where x-rays are not. This complementarity is presented and discussed. Most of the experimental results contained herein were obtained usi

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20

Reeves, Pauline Jane. "Models of care in diagnostic radiography." Thesis, Bangor University, 1998. https://research.bangor.ac.uk/portal/en/theses/models-of-care-in-diagnostic-radiography(e3622893-8a99-480c-a38a-6aa1b38eefeb).html.

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This research set out to develop one or more conceptual models of diagnostic radiography based on the ways in which clinical radiographers themselves viewed their skills. The report analyses the historical relationship between radiographers and radiologists and the limited attempts at theory development prior to this research. This context is set against selected literature from nursing metatheory. This comparison is made since radiography had in part developed from the nursing profession and the historical and gendered background of both professions may be seen to be similar. •The methodology

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21

Bougeant, Olivier. "Alternative techniques of backscatter radiography Snapshot Aperture Backscatter Radiography and Collimated Segmented Detector Scatter X-ray Imaging /." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025092.

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22

Chen, Kun. "A study of spectroscopic, cold neutron radiography." [Bloomington, Ind.] : Indiana University, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3240030.

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Thesis (Ph.D.)--Indiana University, Dept. of Physics, 2006.<br>"Title from dissertation home page (viewed July 16, 2007)." Source: Dissertation Abstracts International, Volume: 67-10, Section: B, page: 5819. Adviser: Hans-Otto Meyer.

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23

Price, R. "Developing practice in radiography and diagnostic imaging." Thesis, University of Hertfordshire, 2007. http://hdl.handle.net/2299/1056.

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An increase in the range and capability of imaging modalities has resulted in greater demands for radiology services. This research investigates how these changes have affected role requirements and role extensions of radiographers and the consequent implications for the educational needs of radiographers. Semi-structured interviews and three successive surveys of NHS radiography managers showed that the adoption and diffusion of extended roles in radiography had increased significantly over a ten year period. Role changes included additions both to the procedures carried out by radiographers,

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24

Felipe-Valera, Elena M. "Professionalism in Radiography| A Multiple Case Study." Thesis, Keiser University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13807028.

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<p> This study explored the perceptions that radiography faculty and students have of professionalism in health care. The purpose of this qualitative multiple case study was to understand the substance and the meaning that radiography faculty and students give to professionalism. Learning professionalism in the imaging sciences necessitates emersion in authentic experiences, which the authors call "legitimate peripheral participation," so that skills and didactic knowledge gained in a classroom can be applied in real situations among a community of experts in a field of study (Lave & Wenge

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25

Hudson, Lizel Sandra Ann. "Enhancing academic writing competence in radiography education." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/1554.

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Thesis (MTech (Radiography))--Cape Peninsula University of Technology, 2011<br>This thesis records a study undertaken by a radiography lecturer at a satellite campus of a University of Technology (UoT) in the Western Cape Province of South Africa. The study investigated the academic writing practices of first year Radiation Science learners and focused on an intervention to assist learners to enhance their academic writing competence. Three research questions were addressed: 1. What did radiography learners perceive to be the factors that enabled and constrained their academic writing co

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26

Maschio, Maria Celeste. "Performance evaluation of detector for digital radiography." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8317/.

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Lo scopo di questo lavoro è la caratterizzazione fisica del flat panel PaxScan4030CB Varian, rivelatore di raggi X impiegato in un ampio spettro di applicazioni cliniche, dalla radiografia generale alla radiologia interventistica. Nell’ambito clinico, al fine di una diagnosi accurata, è necessario avere una buona qualità dell’immagine radiologica mantenendo il più basso livello di dose rilasciata al paziente. Elemento fondamentale per ottenere questo risultato è la scelta del rivelatore di radiazione X, che deve garantire prestazioni fisiche (contrasto, risoluzione spaziale e rumore) adeguat

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27

Yao, Min. "Computed radiography system modeling, simulation and optimization." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0128/document.

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Depuis plus d’un siècle, la radiographie sur film est utilisée pour le contrôle non destructif (CND) de pièces industrielles. Avec l’introduction de méthodes numériques dans le domaine médical, la communauté du CND industriel a commencé à considérer également les techniques numériques alternatives au film. La radiographie numérique (en anglais Computed radiography -CR) utilisant les écrans photostimulables (en anglais imaging plate -IP) est une voie intéressante à la fois du point de vue coût et facilité d’implémentation. Le détecteur (IP) utilisé se rapproche du film car il est flexible et ré

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28

Rivetti, Di Val Cervo Stefano <1975&gt. "Performance evaluation of detectors for digital radiography." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3611/1/stefano_rivetti_tesi.pdf.

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To date the hospital radiological workflow is completing a transition from analog to digital technology. Since the X-rays digital detection technologies have become mature, hospitals are trading on the natural devices turnover to replace the conventional screen film devices with digital ones. The transition process is complex and involves not just the equipment replacement but also new arrangements for image transmission, display (and reporting) and storage. This work is focused on 2D digital detector’s characterization with a concern to specific clinical application; the systems features

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Rivetti, Di Val Cervo Stefano <1975&gt. "Performance evaluation of detectors for digital radiography." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3611/.

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To date the hospital radiological workflow is completing a transition from analog to digital technology. Since the X-rays digital detection technologies have become mature, hospitals are trading on the natural devices turnover to replace the conventional screen film devices with digital ones. The transition process is complex and involves not just the equipment replacement but also new arrangements for image transmission, display (and reporting) and storage. This work is focused on 2D digital detector’s characterization with a concern to specific clinical application; the systems features

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30

Klein, Caroline Gugisch. "Avaliação da arquitetura óssea trabecular por meio de processamento de imagem digital em radiografias panorâmicas." Centro Federal de Educação Tecnológica do Paraná, 2005. http://repositorio.utfpr.edu.br/jspui/handle/1/102.

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Este trabalho teve como objetivo modificar um algoritmo de esqueletização e criar outro para quantificar imagens radiográficas. Foi proposto um tratamento digital em radiografias panorâmicas de 50 voluntárias diagnosticadas como osteoporóticas e não osteoporóticas em um estudo anterior. Para verificar a validade deste recurso digital, foi elaborado um questionário que juntamente com as radiografias foi distribuído entre quinze examinadores radiologistas. Estes analisaram de forma subjetiva 99 imagens, respondendo quais os critérios adotados para a avaliação da arquitetura óssea trabecular. Os

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31

Yeo, Daxter Kai Loon. "Distortions in panoramic radiographs /." [St. Lucia, Qld. : s.n.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16647.pdf.

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32

Abdelrahman, Magdy Shehata. "Scattering correction and image restoration in neutron radiography and computed tomography." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3025066.

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33

Yakoubian, Jeffrey Scott. "Adaptive histogram equalization for mammographic image processing." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/16387.

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34

Mallineni, Sreekanth Kumar. "Radiographic localization of supernumerary teeth in the maxilla." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46848940.

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35

Forman, D. "Shared learning : monitoring the attitudinal changes of staff and students on undergraduate health care professional programmes." Thesis, Sheffield Hallam University, 2000. http://shura.shu.ac.uk/19656/.

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The aim of this investigation was to monitor attitudinal changes of staff and students participating in undergraduate professional programmes to the implementation of shared learning over a four-year period. The programmes being studied were the BSc. Occupational Therapy, BSc. Diagnostic Radiography and BSc. Therapeutic Radiography Honours degrees. Each validated programme contained some syllabus areas that were taught together i.e. were shared across the professions. Initially, after a review of the existing literature on this issue, a questionnaire was designed as a research tool to enable b

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36

Stamatakis, Harry Charalabos. "Physical and psychophysical properties of digital intraoral radiography /." Stockholm, 1999. http://diss.kib.ki.se/1999/91-628-3799-0/.

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37

Fink, David Walter. "Detecting corrosion in aircraft components using neutron radiography." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39993.

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38

Borges, Nicholas P. "Improving Imaging Techniques and Resolution in Neutron Radiography." Digital WPI, 2020. https://digitalcommons.wpi.edu/etd-dissertations/604.

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Hydrogenous samples, such as biological tissues, analyzed in a neutron radiography geometry display reduced image contrast and resolution due to excessive image contributions from scattered neutrons produced from the high neutron-scatter cross section with hydrogen. Because of this, neutrons presently are not used for thick-tissue(>2.5cm) or in-vivo imaging. Two methods of neutron scatter rejection and event centroiding, were employed to enhance the quality of biological neutron imaging by reducing image blurring noise caused by hydrogen and increasing the contrast ratio of the detector. By em

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39

ALBERTIN, Fauzia. "K-edge Radiography and applications to Cultural Heritage." Doctoral thesis, Università degli studi di Ferrara, 2011. http://hdl.handle.net/11392/2388734.

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The present work of thesis is focused on application of X-ray K-edge technique to paintings. This technique allows one to achieve a topographic map of a pigment on the whole surface of the painting. The digital acquisition of radiographic images by using monochromatic X-ray beams allows to take advantage of the sharp rise of X-ray absorption coefficient of the elements, the K-edge discontinuity. Working at different energies, bracketing the K-edge peak, allows recognition of the target element. The K-edge radiography facility installed at Larix Laboratory, at Department of Physics in

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Lucchese, M. "TOTAL VARIATION POISSON NOISE REMOVAL IN DIGITAL RADIOGRAPHY." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/203243.

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Since the digital X-Ray images are the results of a measurement process, they are affected by noise. Linear filters remove the fluctuations of pixels value related to the presence of noise attenuating or removing the high frequency content of the images, having the drawback that they smooth also the edges and so they corrupt structural information inside them. A more principled approach, widely adopted for image denoising since the paper of Rudin et al., is based on regularization. In this framework the filtered image is obtained through the maximization of a properly defined cost function, in

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41

Ley, Paul J. "An in-vitro comparison of working length determination between a digital system and conventional film when source-film/sensor distance and exposure time are modified." Connect to resource online, 2009. http://hdl.handle.net/1805/1928.

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Thesis (M.S.D.)--Indiana University School of Dentistry, 2009.<br>Title from PDF t.p. (viewed Aug. 11, 2009) Advisors: Mychel Vail, Chair of the Research Committee, Susan Zunt, Ted Parks, Kenneth Sponik, Joseph Legan. Curriculum vitae. Includes abstract. Includes bibliographical references (leaves 103-119).

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42

Elhain, Ahmed M. S. B. "An investigation of the influence of radiographic malpositioning and image processing algorithm selection on ICU/CCU chest radiographs." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7342.

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Mobile chest radiography remains the most appropriate test for critical care patients with cardiorespiratory changes and with patients who have chest tubes and lines as a monitoring tool, and to detect complications related to their use. However, one of the most frequent issues recognized radiographically with patients in critical care is chest tubes and lines malposition. This can be related to technical quality reasons which can affect their appearance in the chest radiography. This research considers how the technical quality of the ICU/CCU chest radiography can impact upon the appe

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Brooks, Kenneth W. "Automated analysis of mammography phantom images." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17900.

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Peng, Jinghong P. "Automated acceptance criteria for the American College of Radiology (ACR) mammographic accreditation phantom images." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/18248.

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45

湯添發 and Thiam-huat Tng. "Validity of cephalometric landmarks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B38628399.

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46

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

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47

Odau, James R. "Determining applicant aptitude as a predictor of success in a radiography program." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999odauj.pdf.

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48

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 radiograp

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49

Woodward, Stephanie. "Development and applications of a pulsed neutron radiography system." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46916.

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Gobbi, David G. "A high-pressure gas microstrip detector for digital radiography." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ27049.pdf.

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