Zobrazeno 1 - 10
of 18
pro vyhledávání: '"S R, Amtey"'
Publikováno v:
Medical Physics. 8:358-367
The purpose of this study is to examine the diagnostic potential of a scanning digital radiography (SDR) system currently used clinically as a CT localization device. The technique of contrast-detail-dose analysis is used to compare the low-contrast
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f4f8d121e9728136aad9dde23bf5918
https://doi.org/10.1118/1.594958
https://doi.org/10.1118/1.594958
Autor:
S. R. Amtey, James W. Israel
Publikováno v:
Medical Physics. 7:677-684
A method is developed by which the imaging characteristics of a tomographic x-ray unit may be determined directly from a study of the mechanical motion of the unit. In this method we first describe the mechanical motions in terms of a vector equation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fe57f5be433f3aed3441804b94da01d
https://doi.org/10.1118/1.594818
https://doi.org/10.1118/1.594818
Publikováno v:
Radiology. 125(2)
The surface topography of a patient can be determined by photogrammetry before beginning radiotherapy. The source light of the therapy unit or simulator is used to project a grid pattern onto the patient, and this is then photographed together with c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::2db7d7bf7b8e61ae95086e09491a2e12
https://pubmed.ncbi.nlm.nih.gov/910065
https://pubmed.ncbi.nlm.nih.gov/910065
Publikováno v:
Application of Optical Instrumentation in Medicine VIII.
The effects of MTF, scatter radiation and display on the contrast-detail characteristics of medical film/screen radiography are examined. Theoretical relationships between these quantities are derived using signal-detection and effective aperture app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::daed9ee6faab3adaf37fb73ce63504d4
https://doi.org/10.1117/12.958899
https://doi.org/10.1117/12.958899
Publikováno v:
SPIE Proceedings.
The method of contrast-detail-dose analysis offers a practical way of obtaining the information content per unit dose to the patient on an imaging system. The method is described and its assets are discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ed12b4ccaf2060d23a9644246b09b67
https://doi.org/10.1117/12.958219
https://doi.org/10.1117/12.958219
Publikováno v:
SPIE Proceedings.
Scatter radiation in diagnostic radiology is recognized as an agent that adds noise to the imaging system and increases patient dose. A prototype computed radiography (CR) system by General Electric uses a highly collimated, 1.5 mm FWHM, pulsed fan-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1de9211ae32b05f98c9ace38d0dbc51b
https://doi.org/10.1117/12.958197
https://doi.org/10.1117/12.958197
Publikováno v:
Application of Optical Instrumentation in Medicine VIII.
A systematic study was performed to investigate the accuracy and precision attained by four methods for determining the characteristic curve of radiographic screen/film systems. The four methods include: inverse square sensitometry, KVP adjusted boot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e868f45607246dc39d5271509aceff9
https://doi.org/10.1117/12.958896
https://doi.org/10.1117/12.958896
Publikováno v:
Applications of Digital Image Processing III.
Computed radiography (CR) is a recent development in diagnostic radiology which yields digital radiographs. Digital image enhancement of CR images in the form of smoothing the noise and enhancing the edges of anatomic boundaries has been used as a me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a7ab059fadcb50863ebda382636d44a
https://doi.org/10.1117/12.958247
https://doi.org/10.1117/12.958247
Autor:
S. R. Fogel, Frank A. DiBianca, S. R. Amtey, R. G. Lester, Gerald Cohen, S. F. Handel, Louis K. Wagner, C. S. Katragadda
Publikováno v:
Application of Optical Instrumentation in Medicine VII.
The contrast sensitivity and patient entrance dose of a prototype computed radiography (CR) system is examined, and the results compared with those obtained from computed tomography and conventional radiography. Limiting perceptibility measurements o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e318fec3b2166bef937c2e65337fe04
https://doi.org/10.1117/12.957122
https://doi.org/10.1117/12.957122
Autor:
S R, Amtey, R K, Tyson
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 18(7)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::ab51935437bafb9c247d2c25ee5a38b9
https://pubmed.ncbi.nlm.nih.gov/874160
https://pubmed.ncbi.nlm.nih.gov/874160