Relevant bibliographies by topics / Medical in art Radiography

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Medical in art Radiography'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Medical in art Radiography"

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Yahaghi, Effat, Amir Movafeghi, Shokoofeh Ahmadi, Sholeh Ansari, Mehran Taheri, and Naser Rastkhah. "Cultural Heritage Object Identification by Radiography Nondestructive Method and Digital Image Processing." Applied Mechanics and Materials 83 (July 2011): 35–40. http://dx.doi.org/10.4028/www.scientific.net/amm.83.35.

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Nondestructive testing (NDT) is an important tool in the world of industry. Among different NDT methods, radiography plays a very interesting role both in industry and medicine. Medical and industrial uses of X and gamma rays were recognized since more than 1 century ago. One of the interesting uses of radiography is in archeological and art applications. In this research, radiography was utilized for identification of a damaged art-historical material. The subject is a brass tray belonging to Iran cultural heritage with an estimated age of about 3500 years. The tray was found in Lorestan province and referred to as “Lorestan bonze”. The object was damaged seriously due to heavy corrosion attack. Therefore recognition of the object was a major problem. Normal radiography method can help for object determination, but it suffers some major drawbacks related to contrast and thickness measurement. Image processing technique and a precise thickness measurement method were added to digitized radiographs. A precise radiographic thickness method was introduced and used before for the pipeline radiography. For digital image processing, Canny edge detection method and Gaussian filter were used. Radiography image obtained from this work showed a very clear picture of the original trace of hammered design. These results showed that a combination of radiography, image processing techniques and consideration of physical principles of radiation interaction with materials can produce a very clear image which can be used effectively for hte detail analysis of cultural heritages.
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Meier, Reinhard, Christian Krug, Daniel Golovko, Sophie Boddington, Guido Piontek, Martina Rudelius, Elizabeth J. Sutton, Andrea Baur-Melnyk, Ella F. Jones, and Heike E. Daldrup-Link. "Indocyanine green-enhanced imaging of antigen-induced arthritis with an integrated optical imaging/radiography system." Arthritis & Rheumatism 62, no. 8 (May 5, 2010): 2322–27. http://dx.doi.org/10.1002/art.27542.

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Carr, Christopher, and Jean-Christophe Komorowski. "Identifying the Mineralogy of Rock Temper in Ceramics Using X-Radiography." American Antiquity 60, no. 4 (October 1995): 723–49. http://dx.doi.org/10.2307/282055.

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Industrial and medical x-radiography can be used in a manner analogous to back-scattered electron microscopy to identify the approximate mineralogy of rock temper particles in ceramics, but without their destruction by thin-sectioning, and at low cost. Particle traits similar to those used in petrography to identify a mineral are visible in a magnified x-radiograph. The traits include particle x-radiographic gray level, which varies with a particle’s mean atomic number, specific gravity, and mineralogy; size; morphology; cleavage; and internal texture. Blind tests are made to evaluate the specificity and accuracy of the method. Its utility is shown through a study of the exchange of Ohio Middle Woodland ceramics.
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Malattia, Clara, Maria Beatrice Damasio, Francesca Magnaguagno, Angela Pistorio, Maura Valle, Carlo Martinoli, Stefania Viola, et al. "Magnetic resonance imaging, ultrasonography, and conventional radiography in the assessment of bone erosions in juvenile idiopathic arthritis." Arthritis & Rheumatism 59, no. 12 (December 15, 2008): 1764–72. http://dx.doi.org/10.1002/art.24313.

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Hauzeur, Jean-Philippe, and Valérie Gangji. "Early Kienböck disease cannot be detected by radiography: Comment on the clinical image by Ko et al." Arthritis & Rheumatism 62, no. 4 (January 28, 2010): 1201. http://dx.doi.org/10.1002/art.27341.

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Nevitt, Michael C., Charles Peterfy, Ali Guermazi, David T. Felson, Jeff Duryea, Thasia Woodworth, Hepei Chen, Kent Kwoh, and Tamara B. Harris. "Longitudinal performance evaluation and validation of fixed-flexion radiography of the knee for detection of joint space loss." Arthritis & Rheumatism 56, no. 5 (2007): 1512–20. http://dx.doi.org/10.1002/art.22557.

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Brandt, Kenneth D. "Translating osteoarthritis into numbers: The importance of alignment in knee radiography for clinical trials of structure-modifying drugs." Arthritis & Rheumatism 52, no. 5 (May 2005): 1343–45. http://dx.doi.org/10.1002/art.21025.

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Issa, Sakeba N., Dorothy Dunlop, Alison Chang, Jing Song, Pottumarthi V. Prasad, Ali Guermazi, Charles Peterfy, et al. "Full-limb and knee radiography assessments of varus-valgus alignment and their relationship to osteoarthritis disease features by magnetic resonance imaging." Arthritis & Rheumatism 57, no. 3 (2007): 398–406. http://dx.doi.org/10.1002/art.22618.

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van Rossum, Marion A. J., Maarten Boers, Aeilko H. Zwinderman, Renée M. van Soesbergen, Helen Wieringa, Theo J. W. Fiselier, Marcel J. A. M. Franssen, et al. "Development of a standardized method of assessment of radiographs and radiographic change in juvenile idiopathic arthritis: Introduction of the Dijkstra composite score." Arthritis & Rheumatism 52, no. 9 (2005): 2865–72. http://dx.doi.org/10.1002/art.21247.

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Ho, Thi Kieu, and Jeonghwan Gwak. "Multiple Feature Integration for Classification of Thoracic Disease in Chest Radiography." Applied Sciences 9, no. 19 (October 2, 2019): 4130. http://dx.doi.org/10.3390/app9194130.

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The accurate localization and classification of lung abnormalities from radiological images are important for clinical diagnosis and treatment strategies. However, multilabel classification, wherein medical images are interpreted to point out multiple existing or suspected pathologies, presents practical constraints. Building a highly precise classification model typically requires a huge number of images manually annotated with labels and finding masks that are expensive to acquire in practice. To address this intrinsically weakly supervised learning problem, we present the integration of different features extracted from shallow handcrafted techniques and a pretrained deep CNN model. The model consists of two main approaches: a localization approach that concentrates adaptively on the pathologically abnormal regions utilizing pretrained DenseNet-121 and a classification approach that integrates four types of local and deep features extracted respectively from SIFT, GIST, LBP, and HOG, and convolutional CNN features. We demonstrate that our approaches efficiently leverage interdependencies among target annotations and establish the state of the art classification results of 14 thoracic diseases in comparison with current reference baselines on the publicly available ChestX-ray14 dataset.
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Dissertations / Theses on the topic "Medical in art Radiography"

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Chapman, Alison. "Dosimetric verification of intensity modulated radiation therapy." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20061026.141700/index.html.

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Al-Kabir, Zul Waker Mohammad. "A knowledge based system for diagnosis of lung diseases from chest x-ray images /." Canberra : University of Canberra, 2007. http://erl.canberra.edu.au/public/adt-AUC20070823.160921/index.html.

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Thesis (PhD) -- University of Canberra, 2006.
Thesis submitted in fulfilment of the requirements for the degree of Master of Information Science in the School of Information Sciences and Engineering under the Division of Business, Law and Sciences at the University of Canberra, May 2006. Bibliography: leaves 120-132.
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Masek, Martin. "Hierarchical segmentation of mammograms based on pixel intensity." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2004. http://theses.library.uwa.edu.au/adt-WU2003.0033.

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Mammography is currently used to screen women in targeted risk classes for breast cancer. Computer assisted diagnosis of mammograms attempts to lower the workload on radiologists by either automating some of their tasks or acting as a second reader. The task of mammogram segmentation based on pixel intensity is addressed in this thesis. The mammographic process leads to images where intensity in the image is related to the composition of tissue in the breast; it is therefore possible to segment a mammogram into several regions using a combination of global thresholds, local thresholds and higher-level information based on the intensity histogram. A hierarchical view is taken of the segmentation process, with a series of steps that feed into each other. Methods are presented for segmentation of: 1. image background regions; 2. skin-air interface; 3. pectoral muscle; and 4. segmentation of the database by classification of mammograms into tissue types and determining a similarity measure between mammograms. All methods are automatic. After a detailed analysis of minimum cross-entropy thresholding, multi-level thresholding is used to segment the main breast tissue from the background. Scanning artefacts and high intensity noise are separated from the breast tissue using binary image operations, rectangular labels are identified from the binary image by their shape, the Radon transform is used to locate the edges of tape artefacts, and a filter is used to locate vertical running roller scratching. Orientation of the image is determined using the shape of the breast and properties of the breast tissue near the breast edge. Unlike most existing orientation algorithms, which only distinguish between left facing or right facing breasts, the algorithm developed determines orientation for images flipped upside down or rotated onto their side and works successfully on all images of the testing database. Orientation is an integral part of the segmentation process, as skin-air interface and pectoral muscle extraction rely on it. A novel way to view the skin-line on the mammogram is as two sets of functions, one set with the x-axis along the rows, and the other with the x-axis along the columns. Using this view, a local thresholding algorithm, and a more sophisticated optimisation based algorithm are presented. Using fitted polynomials along the skin-air interface, the error between polynomial and breast boundary extracted by a threshold is minimised by optimising the threshold and the degree of the polynomial. The final fitted line exhibits the inherent smoothness of the polynomial and provides a more accurate estimate of the skin-line when compared to another established technique. The edge of the pectoral muscle is a boundary between two relatively homogenous regions. A new algorithm is developed to obtain a threshold to separate adjacent regions distinguishable by intensity. Taking several local windows containing different proportions of the two regions, the threshold is found by examining the behaviour of either the median intensity or a modified cross-entropy intensity as the proportion changes. Image orientation is used to anchor the window corner in the pectoral muscle corner of the image and straight-line fitting is used to generate a more accurate result from the final threshold. An algorithm is also presented to evaluate the accuracy of different pectoral edge estimates. Identification of the image background and the pectoral muscle allows the breast tissue to be isolated in the mammogram. The density and pattern of the breast tissue is correlated with 1. Breast cancer risk, and 2. Difficulty of reading for the radiologist. Computerised density assessment methods have in the past been feature-based, a number of features extracted from the tissue or its histogram and used as input into a classifier. Here, histogram distance measures have been used to classify mammograms into density types, and ii also to order the image database according to image similarity. The advantage of histogram distance measures is that they are less reliant on the accuracy of segmentation and the quality of extracted features, as the whole histogram is used to determine distance, rather than quantifying it into a set of features. Existing histogram distance measures have been applied, and a new histogram distance presented, showing higher accuracy than other such measures, and also better performance than an established feature-based technique.
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Tangboonduangjit, Puangpen. "Intensity-modulated radiation therapy dose maps the matchline effect /." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060724.095712/index.html.

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Piyaratna, Nelson. "Radiotherapy x-ray dose distribution beneath retracted patient compensators /." View thesis, 1995. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030902.121636/index.html.

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Thesis (M.Sc.(Hons.))--University of Western Sydney, Nepean, 1995.
"A thesis submitted in fulfilment of the requirements for the degree of Master of Science (Honours) in Physics at the University of Western Sydney, Nepean" -- T.p. Bibliography: leaves 123-128.
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Holm, Kvist Loka, and Stella Sabo. "How old are you? Age assessments based on dental radiographs of third molars around the 18-year-threshold in different populations, a systematic review." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19964.

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SammanfattningMineralisering och utveckling av visdomständer kan användas som åldersindikator i övre tonåren och används för asylsökande utan identifikation eller födelseattest. Utvärderingen görs med hjälp av dentala röntgenbilder och olika tolkningsmodeller.Målet med den aktuella studien var att undersöka åldersbedömningsmetoder på röntgenbilder av visdomständers tillförlitlighet och överensstämmelse med fokus på populationsgrupper och etnicitet. Detta är av vikt då resultat från en sådan bedömning ligger till grund för juridiska beslut huruvida en individ är vuxen eller ett barn (över eller under 18 år).En systematisk sökning genomfördes i PubMed, Embase och Cochrane enligt PRISMA-modellen, och 23 artiklar som uppfyllde inklusionskriterierna granskades av två observatörer enligt en modifierad QUADAS 2 och tio artiklar bedömdes ha låg risk för bias.Populationsbeskrivningarna var bristande. Detta leder till svårigheter att utföra bedömningar av artiklars resultat och precision, därmed också jämförelser mellan olika studier. Problemet ligger på en generell nivå då definitioner är osäkra, men samtidigt i de separata artiklarna då de inte redovisat någon definition.Det var svårt att jämföra de inkluderade artiklarna då deras syften och metoder varierade. Huvudfyndet var att de flesta artiklarna konkluderade att användningen av visdomstanden som en åldersindikator i de övre tonåren är en otillräcklig metod. Användning och betydelse av dess resultat bör därför ifrågasättas.
AbstractThe mineralization and development of the third molars can be used as an indicator of age in the upper teens and is used in purpose of assessing age in asylum seekers without identification or birth certificates. The evaluation is determined with dental radiographs and different methods of interpretation.The aim of the study was to investigate the accuracy and precision of different age estimation models of radiographs of third molars, focusing on population groups and ethnicity. This is of great importance since the results of an age assessment constitute the basis in a juridical outcome, deciding whether an individual is an adult or a child (over or under 18 years of age). A systematic search of PubMed, Embase and Cochrane was made according to the PRISMA-statement, and 23 articles which met the inclusion criteria were assessed using a modified QUADAS 2 by two observers, ten of these were graded as having low risk of bias.Population groups were poorly described, leading to difficulties in evaluating results and precision, thereby also comparisons between different studies. The problem both lay at a general level where definitions are ambivalent, but also in the separate articles where definitions are missing.It was hard to compare the included papers since their aims and methods varied. The main finding was that most of the articles concluded that the use of the third molar as an age indicator in the upper teens is an insufficient system. The use and impact of the results should thereby be questioned.
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Wake, Giulia M. G. H. "Exact minimisation of treatment time for the delivery of intensity modulated radiation therapy." University of Western Australia. School of Mathematics and Statistics, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0195.

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This thesis investigates the exact minimisation of treatment delivery time for Intensity Modulated Radiation Therapy (IMRT) for the treatment of cancer using Multileaf Collimators (MLC). Although patients are required to remain stationary during the delivery of IMRT, inevitably some patient movement will occur, particularly if treatment times are longer than necessary. Therefore minimising the treatment delivery time of IMRT may result in less patient movement, less inaccuracy in the dosage received and a potentially improved outcome for the patient. When IMRT is delivered using multileaf collimators in 'step and shoot' mode, it consists of a sequence of multileaf collimator configurations, or shape matrices; for each, time is needed to set up the configuration, and in addition the patient is exposed to radiation for a specified time, or beam-on time. The 'step and shoot leaf sequencing' problems for minimising treatment time considered in this thesis are the constant set-up time Total Treatment Time (TTT) problem and the Beam-on Time Constrained Minimum Cardinality (BTCMC) problem. The TTT problem minimises a weighted sum of total beam-on time and total number of shape matrices used, whereas the BTCMC problem lexicographically minimises the total beam-on time then the number of shape matrices used in a solution. The vast majority of approaches to these strongly NP-hard problems are heuristics; of the few exact approaches, the formulations either have excessive computation times or their solution methods do not easily incorporate multileaf collimator mechanical constraints (which are present in most currently used MLC systems). In this thesis, new exact mixed integer and integer programming formulations for solving the TTT and BTCMC problems are developed. The models and solution methods considered can be applied to the unconstrained and constrained versions of the problems, where 'constrained' refers to the modelling of additional MLC mechanical constraints. Within the context of integer programming formulations, new and existing methods for improving the computational efficiency of the models presented are investigated. Numerical results for all variations considered are provided. This thesis demonstrates that significant computational improvement can be achieved for the exact mixed integer and integer programming models investigated, via solution approaches based on an idea of systematically 'stepping-up' through the number of shape matrices used in a formulation, via additional constraints (particularly symmetry breaking constraints) and via the application of improved bounds on variables. This thesis also makes a contribution to the wider field of integer programming through the examination of an interesting substructure of an exact integer programming model. In summary, this thesis presents a thorough analysis of possible integer programming models for the strongly NP-hard 'step and shoot' leaf sequencing problems and investigates and applies methods for improving the computational efficiency of such formulations. In this way, this thesis contributes to the field of leaf sequencing for the application of Intensity Modulated Radiation Therapy using Multileaf Collimators.
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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 Fourier deconvolution have limited appeal. In this research we apply maximum entropy methods (MEM) to some radiological images. We justify the choice of MEM over other deconvolution schemes by processing a selection of artificial images in which the blur and noise mimic the real situation but whose levels are known a priori. A hybrid MEM scheme is developed to address the shortcomings of so-called historic MEM in these situations. We initially consider images from situations in which the model point- spread function is assumed to be three-dimensionally spatially invariant, and which approximates the real situation reasonably well. One technique lends itself well to this investigation: magnification mammography. MEM is offered as a way of breaking some of the conflicting performance requirements of this technique and we explore several new system possibilities with a working MEM system in place. A more complicated blurring function is encountered in linear tomography, which uses opposing movements of the image receptor and x-ray source to generate planar images through an object. Features outside a particular focal plane are smeared to such an extent that detail within the focal plane can be very difficult to detect. With appropriate modification of our MEM technique, processed images show a significant reduction to the blurring outside the focal plane.
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Vazquez, Quino Luis Alberto. "Relation between the patient dose and the image quality for commercial imaging devices." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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Murphy, Frederick. "Understanding the humanistic interaction with medical imaging technology." Thesis, Bangor University, 2003. https://research.bangor.ac.uk/portal/en/theses/understanding-the-humanistic-interaction-with-medical-imaging-technology(6d8cb645-beb0-41a7-a06d-1c5f248e055f).html.

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This study set out to discover the nature of the interactions that occur between the radiographer, patient and high technology imaging equipment. The investigation focussed upon two radiology departments where patients had just had either a CT or MR scan. No attempt was made to generalise the findings, since it was the existence of the phenomena, rather than the frequency of events elsewhere, that was under scrutiny. A thorough literature review revealed a distinct lack of previous research in this area, with only quantitative methodological approaches having been employed. This study was a purely inductive qualitative investigation, that sought to explore feelings, meanings and roles within the context of the imaging departments. A thematic content analysis of 49 semi-structured patient interviews revealed a varying degree of satisfaction, fear and misunderstanding. These data were complemented with 8 interviews of self-selecting radiographers, who had experienced a CT or MR scan, and 8 interviews of radiographers who predominately worked in these high technology areas. Following data analysis, specific typologies were derived from the concepts to formulate a model of the humanistic interaction with medical imaging technology. Discussion of the findings related to the technological and humanistic literature, and the alternative micro-sociological perspectives of Symbolic Interactionism and Critical Dramaturgy, gave a more creative explanation of the unique theory. The final section of the discussion considered the potential for future research and a reflexive analysis of the study. In conclusion, the model is considered to be a valid conceptual representation of the interactions within the context of the naturalistic setting. The theory developed provides enlightening insights with respect to roles and rituals performed in the radiology department.
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Books on the topic "Medical in art Radiography"

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C, Malott Jack, and Morgan James A, eds. The art and science of medical radiography. 6th ed. St. Louis, MO: Catholic Health Association of the United States, 1987.

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Joseph, Fodor, ed. The art and science of medical radiography. 7th ed. St. Louis: Mosby Year Book, 1993.

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Malott, Jack C. The art and science ofmedical radiography. 7th ed. St. Louis: Mosby Year Book, 1993.

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Finney, William F. Workbook with lab exercies to accompany Principles of radiographic imaging: An art and a science : 3rd edition. Albany, N.Y: Delmar/Thomson Learning, 2001.

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Mckenna, Adler Arlene, ed. Principles of radiographic imaging: An art and a science. 2nd ed. Albany, N.Y: Delmar Publishers, 1996.

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Carlton, Richard R. Principles of radiographic imaging: An art and a science. Albany, N.Y: Delmar Publishers, 1992.

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Carlton, Richard R. Principles of radiographic imaging: An art and a science. 3rd ed. Albany: Delmar Thomson Learning, 2000.

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McElroy, Gil. X-ray specs. Charlottetown, PEI: Confederation Centre Art Gallery & Museum = Galerie et musée d'art du Centre de la Confédération, 2000.

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Shikles, Janet L. Screening mammography: Federal quality standards are needed : statement of Janet L. Shikles, Director, Health Financing and Policy Issues, Human Resources Division, before the Subcommittee on Health and the Environment, Committee on Energy and Commerce, House of Representatives. [Washington, D.C.]: The Office, 1992.

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Wagner, Jennifer. Mammography exam review. Clifton Park, NY: Delmar Cengage Learning, 2008.

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Book chapters on the topic "Medical in art Radiography"

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Seeram, Euclid. "Medical Imaging Informatics." In Digital Radiography, 85–95. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6522-9_10.

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Davies, S. G. "Radiography and Arthrography." In Medical Radiology, 1–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/174_2010_136.

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Heuser, Lothar. "Digital Radiography." In Springer Handbook of Medical Technology, 291–310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-540-74658-4_15.

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Seeram, Euclid. "Medical Imaging Informatics: An Overview." In Digital Radiography, 165–83. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3244-9_10.

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Ng, Kwan Hoong, Jeannie Hsiu Ding Wong, and Geoffrey D. Clarke. "Digital Radiography." In Problems and Solutions in Medical Physics, 31–39. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018]- | Series: Series in medical physics and biomedical engineering: CRC Press, 2018. http://dx.doi.org/10.1201/9781351006781-4.

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Fujioka, Mutsuhisa. "Upper airway in children: Medical application of CR." In Computed Radiography, 71–76. Tokyo: Springer Japan, 1987. http://dx.doi.org/10.1007/978-4-431-66884-8_10.

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Ng, Kwan Hoong, Jeannie Hsiu Ding Wong, and Geoffrey D. Clarke. "Screen Film Radiography." In Problems and Solutions in Medical Physics, 23–30. Boca Raton, FL : CRC Press, Taylor & Francis Group, [2018]- | Series: Series in medical physics and biomedical engineering: CRC Press, 2018. http://dx.doi.org/10.1201/9781351006781-3.

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Thomsen, Henrik S., and Peter Leander. "Radiography with Gadolinium-Based Contrast Media." In Medical Radiology, 193–200. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/174_2013_894.

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Cameron, Josie. "Radiography and prescribing." In Non-Medical Prescribing in Health Care Practice, 179–85. London: Macmillan Education UK, 2007. http://dx.doi.org/10.1007/978-0-230-20832-2_15.

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Coche, Emmanuel E. "Chest Radiography Today and Its Remaining Indications." In Medical Radiology, 3–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-79942-9_1.

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Conference papers on the topic "Medical in art Radiography"

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Peterzol, Angela, Bruno Bader, Julien Banchet, Claire Caperaa, and Vivian Didier. "Image Quality Assessment of Four Different Computed Radiography Systems for NDT Applications." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97704.

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Computed radiography (CR) is a digital radiographic technique, which uses very similar equipment to conventional radiography except that in place of a film to create the latent image, an imaging plate (IP) made of a photostimulable phosphor is used [1]. CR systems are commonly used in medical applications since they have proven reliability over more than two decades. Conversely, the NDT community has discussed the efficacy of film replacement by CR for more than 15 years. Though some standards were introduced in 2005 (ASTM E 2033, CEN EN 14784-2) and others are on the way (PR ISO 17636-2), CR is actually not included within the French RCCM, while the technique is commonly used in US for nuclear applications according to ASME (Section V, article 2). Since 2006, AREVA has been evaluating the performance of CR in comparison to conventional RT in the framework of EN 14784 for the digital part and the RCCM for the conventional part. The objective was to build a technical justification report to eventually support introduction of CR into the RCCM. In 2009 the subject gave rise to collaboration between AREVA NP – NETEC and EDF-CEIDRE, for a joint project to establish performance limits of CR towards EN 14784 specifications and RCCM image quality indicator (IQI) requirements [2]. In this paper, we present performance comparison results of four different CR systems. The measurements were conducted in 2012 and they demonstrate the current state of achievable image quality in CR. The performance has been evaluated for steel with a thickness range of 20÷60 mm using an Iridium 192 gamma source. Image quality has been assessed in terms of EN 462 and ASTM (E 747, E 1742) IQI. The results have been scored considering the PR ISO 17636-2, RCCM 2007, and ASME V-2010. This also permitted comparison among the different standard requirements.
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Savoie, Charles, and Darryl Rivest. "Advanced Radiographic Scanning, Enhancement and Electronic Data Storage." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27174.

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It is a well-known fact that radiographs deteriorate with time. Substantial cost is attributed to cataloguing and storage. To eliminate deterioration issues and save time retrieving radiographs, laser scanning techniques were developed in conjunction with viewing and enhancement software. This will allow radiographs to be successfully scanned and stored electronically for future reference. Today’s radiographic laser scanners are capable of capturing images with an optical density of up to 4.1 at 256 grey levels and resolutions up to 4096 pixels per line. An industrial software interface was developed for the non-destructive testing industry so that certain parameters such as scan resolution, number of scans, file format and location to be saved could be adjusted as needed. Once the radiographs have been scanned, the tiff images are stored, or retrieved into Radiance software (developed by Rivest Technologies Inc.), which will help to properly interpret the radiographs. Radiance was developed to allow the user to quickly view the radiograph’s correctness or enhance its defects for comparison and future evaluation. Radiance also allows the user to zoom, measure and annotate areas of interest. Physical cost associated with cataloguing, storing and retrieving radiographs can be eliminated. You can now successfully retrieve and view your radiographs from CD media or dedicated hard drive at will. For continuous searches and/or field access, dedicated hard drives controlled by a server would be the media of choice. All scanned radiographs will be archived to CD media (CD-R). Laser scanning with a proper acquisition interface and easy to use viewing software will permit a qualified user to identify areas of interest and share this information with his/her colleagues via e-mail or web data access.
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Hasebe, Takashi, Nobuki Tamai, Syohei Tatsuno, Yuma Itahashi, and Kiyoaki Tokunou. "Applicability Study of Computed Radiography to NDE for Piping and Component in Nuclear Power Plant." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29215.

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In Radiography Testing (RT) that is an important nondestructive testing as the quality control, the digital imaging technology rapidly provides advancement. The digital imaging technology is more effective than the film method on an environmental side and the cost side, such as unnecessary of the film storage and a chemical treatment by digital output. Especially, in the medical field, the advancement by the digitalized image data processing is remarkable, and it is attempted the upgrade of the inspection technology. However, RT that uses the high-energy radiation and the fast film is a main current in an industrial field, and it has not arrived at digitalization yet. Therefore, in an industrial RT, digitalization is expected and the examination standardization is required also in ASME, JSME, and JIS. We, Mitsubishi Heavy Industries (MHI), studied an applicability of Computed Radiography (CR) to Non-Destructive Examination (NDE) for welds of piping and thick wall component in nuclear power plant. At first, MHI researched image quality of CR for piping. In this research, it was confirmed that the images of testing results by CR method are equivalent to that by film method in terms of visibility of IQI (Image Quality Indicator) and detection performance of welding defects. And we founded the optimized shooting conditions for piping. Second, MHI researched image quality of CR for thick wall component. In the result, the noise shown in fig.1 was occurred on CR image when the thick wall component such as pressure vessel is radiographed with high energy. It is speculated that the primary cause of this noise is the scattered X-ray effect (shown in fig.2). Therefore it is necessary to investigate the effect of the scattered X-ray on CR image. In this study, to reduce the scattered X-ray effect on CR image, we investigated the effect of 1) screen, 2) screen + filter on image quality of CR for thick wall component. And we studied the optimized shooting conditions and parameters for thicker component than piping to aim for more application. Finally, we applied CR to the pipings and components for nuclear power plant with the optimized shooting conditions and parameters.
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Mori, Masako, Tetsuo Taguchi, Mikio Takagi, and Yoshimitsu Aoki. "Digital Image Acquisition Method for Film Based Radiographic Testing." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2831.

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Radiographic Test (RT) has been widely used in various industries to detect inner defects of weld structures and other significant components. In terms of digitization, although the ASME Boiler and Pressure Vessel Code Section V provides general outlines of digital image acquisition and processing of RT film, it is not widely implemented in industries as medical radiography instruments. One major reason for not being able to drive RT film digitization is that they cannot quantitatively guarantee each RT film and its digital image resolution directly. To solve these bottlenecks, the present paper proposes two things: 1) Line pair type penetrameter corresponding to current image quality indicators (IQIs) for both hole and wire type, which enables us to not only easily guarantee radiographic testing film resolution but also quantify digitalized RT film image resolution [1]; and 2) Line pair type standard film which is used for digitizing “existing RT film” with commonly used imaging scanners. Prototypes of line pair type penetrameters have been developed and prepared for various materials and verified for its applicability to RT digitalization. Also, prototypes of standard film are manufactured and verified that used with scanners, we can get RT film images of which resolution are quantitatively guaranteed. These two new RT film digitizing methodologies enable us to get “resolution guaranteed film images” and “digital inspection.” Furthermore, this will contribute to “remote inspection” where manufacturers, inspectors, customers and government inspectors can share the results of inspection in electronic format and timely confirm them from a remote place.
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Choi, JungHun. "Characteristics of Intracellular and Extracellular Fluid Ratio for the Varying Body Impedances in Fixed Total Body Fluid." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3309.

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A bioelectrical impedance analysis is a proven method to measure body composition in clinical situations. It uses the relation between the body fluid and the impedances in a variety of frequencies. A body model can be simplified as a parallel combination of a capacitor and two resistors which represent a cell membrane, Intracellular Fluid (ICF), and Extracellular Fluid (ECF). Low frequency current passes through ECF and high frequency current also passes through ICF in a body. A Cole-Cole plot is a graphical interpretation of the path of impedances and each axis represents resistance and reactance with variable frequencies. A high value of resistance in a horizontal axis is a resistance value of ECF and a low value of resistance at a high frequency presents ICF. Interpolation technique is needed to find out the exact cross-point between impedance values and the horizontal axis. The two estimated impedance values are used to derive Total Body Water (TBW), ICF, ECF, Fat Free Mass (FFM), and Fat Mass (FM) from various published equations [1]. Minimizing the possible error of fluid volume assessment and accurate prediction of fluid status in a human body is essential for appropriate therapy. Different techniques of fluid status assessment in a human body can be applicable, such as physical examination, orthostatic vital signs, blood volume measurement, acoustic cardiograph, chest radiography, and thoracic ultrasonography [2]. In this study, a bioelectrical impedance spectroscopy device and simple body models were used to collect data such as TBW, ICF, ECF, FM, and FFM. The ratio between ICF and ECF was investigated for the same values of TBW, FM, and FFM by varying impedance values.
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Menk, Ralf-Hendrik, Luis Manuel Montaño Zentina, and Gerardo Herrera Corral. "Phase Contrast Radiography." In MEDICAL PHYSICS: Sixth Mexican Symposium on Medical Physics. AIP, 2011. http://dx.doi.org/10.1063/1.3682842.

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Menk, Ralf-Hendrik. "Phase Contrast Radiography." In MEDICAL PHYSICS: Sixth Mexican Symposium on Medical Physics. AIP, 2002. http://dx.doi.org/10.1063/1.1512034.

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Geluk, Ronald J. "Digital equalization radiography." In Medical Imaging '99, edited by John M. Boone and James T. Dobbins III. SPIE, 1999. http://dx.doi.org/10.1117/12.349524.

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Inanc, F., Joseph N. Gray, Terrence Jensen, and J. Xu. "Human body radiography simulations: development of a virtual radiography environment." In Medical Imaging '98, edited by James T. Dobbins III and John M. Boone. SPIE, 1998. http://dx.doi.org/10.1117/12.317091.

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Ravin, Carl E. "Digital Radiography and PACS." In 1989 Medical Imaging, edited by Samuel J. Dwyer III, R. Gilbert Jost, and Roger H. Schneider. SPIE, 1989. http://dx.doi.org/10.1117/12.953349.

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Reports on the topic "Medical in art Radiography"

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Rodgers, Sidney D. The Operational Art of Employing U.S. Military Medical Assets in Support of United Nations Peacekeeping Operations. Fort Belvoir, VA: Defense Technical Information Center, May 1995. http://dx.doi.org/10.21236/ada298275.

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Moore, Melissa. Phase II - Procurement of State of the Art Research Equipment to Support Faculty Members with the RNA Therapeutics Institute, a component of the Advanced Therapeutics Cluster at the University of Massachusetts Medical School. Office of Scientific and Technical Information (OSTI), October 2011. http://dx.doi.org/10.2172/1037882.

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