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Proceedings Paper

Evaluation of a moving slit technique for mammography
Author(s): Marc S. Rosenthal; Donald Sashin; John M. Herron; Glenn S. Maitz; Joseph W. Boyer; David Gur
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Paper Abstract

A linear self-scanning diode x-ray imaging system for the chest has been modified so that its characteristics for mammographic imaging can be measured. The system consists of an x-ray tube and self-scanning linear diode array assembly which moves in synchrony above and below a phantom or patient. The advantage of this type of system is that scattered radiation is rejected through the use of the line scanning geometry, resulting in improved image quality and less radiation than with area imaging systems. The line scanning digital system is characterized for resolution, MTF, linearity, and contrast sensitivity. Resolution in the scan direction is 6 lp/mm; perpendicular to the scan direction it is 5 lp/mm at 55 kVp and 10% MTF. As currently configured, the S/N ratio of the digital mammographic images is too low for it to be satisfactorily implemented as a mammographic system. S/N could be increased through the use of a more powerful x-ray tube, a multi-slit system, and longer scan times, which would make it more viable for mammography.

Paper Details

Date Published: 1 July 1991
PDF: 11 pages
Proc. SPIE 1443, Medical Imaging V: Image Physics, (1 July 1991); doi: 10.1117/12.43436
Show Author Affiliations
Marc S. Rosenthal, Univ. of Pittsburgh (United States)
Donald Sashin, Univ. of Pittsburgh (United States)
John M. Herron, Univ. of Pittsburgh (United States)
Glenn S. Maitz, Univ. of Pittsburgh (United States)
Joseph W. Boyer, Univ. of Pittsburgh (United States)
David Gur, Univ. of Pittsburgh (United States)

Published in SPIE Proceedings Vol. 1443:
Medical Imaging V: Image Physics
Roger H. Schneider, Editor(s)

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