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Proceedings Paper

Imaging performance of a prototype scanned-slot digital mammography system
Author(s): Andrew D. A. Maidment; Martin Joel Yaffe; Donald B. Plewes; Gordon E. Mawdsley; Ian C. Soutar; Brian G. Starkoski
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Paper Abstract

A prototype of a clinical scanned-slot digital mammography imaging system has been developed, which demonstrates better contrast sensitivity and latitude than current state-of-the- art film-screen mammography systems. The detector consists of a Gd2O2S:Tb phosphor screen coupled via a 2-to-1 demagnifying fiber-optic taper to two time-delay integration (TDI) charge-coupled device (CCD) image arrays. Images are obtained by scanning the 4.0 mm wide by 21 cm long detector across the image field. An 18 cm by 21 cm image contains 2900 by 4032 pixels, of dimension 62 micrometers X 52 micrometers at the detector. Currently, images are produced in 7.8 seconds using a 40 kV tungsten-target spectrum with a total heat load of 50 kJ, giving a mean glandular dose of 0.85 mGy (85 mrad) to a 5 cm thick 50% glandular, 50% adipose breast. The detector has a limiting resolution of 9.5 lp/mm. A clinical version of this prototype, which incorporates several improvements, is being constructed.

Paper Details

Date Published: 14 September 1993
PDF: 11 pages
Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); doi: 10.1117/12.154579
Show Author Affiliations
Andrew D. A. Maidment, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
Martin Joel Yaffe, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
Donald B. Plewes, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
Gordon E. Mawdsley, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
Ian C. Soutar, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
Brian G. Starkoski, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)


Published in SPIE Proceedings Vol. 1896:
Medical Imaging 1993: Physics of Medical Imaging
Rodney Shaw, Editor(s)

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