Imaging performance of a prototype scanned-slot digital mammography system

Andrew D. A. Maidment; Martin Joel Yaffe; Donald B. Plewes; Gordon E. Mawdsley; Ian C. Soutar; Brian G. Starkoski

doi:10.1117/12.154579

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14 September 1993 Imaging performance of a prototype scanned-slot digital mammography system

Andrew D. A. Maidment, Martin Joel Yaffe, Donald B. Plewes, Gordon E. Mawdsley, Ian C. Soutar, Brian G. Starkoski

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Proceedings Volume 1896, Medical Imaging 1993: Physics of Medical Imaging; (1993) https://doi.org/10.1117/12.154579
Event: Medical Imaging 1993, 1993, Newport Beach, CA, United States

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.

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Andrew D. A. Maidment, Martin Joel Yaffe, Donald B. Plewes, Gordon E. Mawdsley, Ian C. Soutar, and Brian G. Starkoski "Imaging performance of a prototype scanned-slot digital mammography system", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); https://doi.org/10.1117/12.154579

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