Digital mammography: the effects of decreased exposure

Matthew T. Freedman M.D.; Dorothy E. Steller Artz; Hamid Jafroudi; Shih-Chung Benedict Lo; Rebecca A. Zuurbier M.D.; Raj Katial; Wendelin S. Hayes; Chris Yuzheng Wu; Jyh-Shyan Lin; Seong Ki Mun

doi:10.1117/12.208369

8 May 1995 Digital mammography: the effects of decreased exposure

Matthew T. Freedman M.D., Dorothy E. Steller Artz, Hamid Jafroudi, Shih-Chung Benedict Lo, Rebecca A. Zuurbier M.D., Raj Katial, Wendelin S. Hayes, Chris Yuzheng Wu, Jyh-Shyan Lin, Seong Ki Mun

Author Affiliations +

Proceedings Volume 2432, Medical Imaging 1995: Physics of Medical Imaging; (1995) https://doi.org/10.1117/12.208369
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

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.

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Matthew T. Freedman M.D., Dorothy E. Steller Artz, Hamid Jafroudi, Shih-Chung Benedict Lo, Rebecca A. Zuurbier M.D., Raj Katial, Wendelin S. Hayes, Chris Yuzheng Wu, Jyh-Shyan Lin, and Seong Ki Mun "Digital mammography: the effects of decreased exposure", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); https://doi.org/10.1117/12.208369

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