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Proceedings Paper

Digital mammography: the effects of decreased exposure
Author(s): Matthew T. Freedman; Dorothy E. Steller Artz; Hamid Jafroudi; Shih-Chung Benedict Lo; Rebecca A. Zuurbier; Raj Katial; Wendelin S. Hayes; Chris Yuzheng Wu; Jyh-Shyan Lin; Seong Ki Mun
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Paper Abstract

It has been stated that digital mammography will reduce the exposure required for mammography. This poster explores the effects of decreased exposure on the information present in digital mammography. In general, the digital system performed better than screen film mammography with lower exposures. With the usual exposures used for screen film mammography, performance was equal. With high exposures sufficient to result in a dark film (OD 1.5), the digital system performed better than screen film with very small test objects. Proposals have been made to decrease the tube loading required for slot scanning devices by increasing KVP. This would result in their being less object contrast due to the decreases in the absorption coefficient of calcium compared to water at higher KVP. This poster looks at the potential for correcting the loss in object contrast that would result from the use of high contrast look up tables. It was found that in the tested system, one could restore the information in one of the two test objects used (but not the other), but that the image processing methods used would result in an image that radiologists would probably find inadequate for interpretation.

Paper Details

Date Published: 8 May 1995
PDF: 13 pages
Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208369
Show Author Affiliations
Matthew T. Freedman, Georgetown Univ. Medical Ctr. (United States)
Dorothy E. Steller Artz, Georgetown Univ. Medical Ctr. (United States)
Hamid Jafroudi, Georgetown Univ. Medical Ctr. (United States)
Shih-Chung Benedict Lo, Georgetown Univ. Medical Ctr. (United States)
Rebecca A. Zuurbier, Georgetown Univ. Medical Ctr. (United States)
Raj Katial, Georgetown Univ. Medical Ctr. (United States)
Wendelin S. Hayes, Georgetown Univ. Medical Ctr. (United States)
Chris Yuzheng Wu, Georgetown Univ. Medical Ctr. (United States)
Jyh-Shyan Lin, Georgetown Univ. Medical Ctr. (United States)
Seong Ki Mun, Georgetown Univ. Medical Ctr. (United States)


Published in SPIE Proceedings Vol. 2432:
Medical Imaging 1995: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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