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Proceedings Paper

DQE evaluation of a full-field digital mammography system
Author(s): Hans Roehrig; Kunal Gandhi; Jiahua Fan; Ananth Poolla; Seiichi Mimura
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Paper Abstract

Physical characteristics necessary to calculate the Detective Quantum Efficiency of a clinically used flat panel imager for full-breast digital mammography are presented. Objective quantities such as modulation transfer function (MTF), noise power spectrum (NPS) and detective quantum efficiency (DQE) have been evaluated. The X-ray photon fluence was determined using Half-Value-Layer (HVL) techniques. At an X-ray beam characterized by 28 kVp, Mo-anode and Mo filter as well as beam hardening by 5 cm Lucite, the detector is practically linear with x-ray exposure at least up to 33 mR. At an exposure of 33 mR and close to zero spatial frequency the DQE is in the vicinity of 60%.

Paper Details

Date Published: 26 October 2004
PDF: 12 pages
Proc. SPIE 5541, Penetrating Radiation Systems and Applications VI, (26 October 2004); doi: 10.1117/12.565872
Show Author Affiliations
Hans Roehrig, Univ. of Arizona (United States)
Kunal Gandhi, Univ. of Arizona (United States)
Jiahua Fan, Univ. of Arizona (United States)
Ananth Poolla, Univ. of Arizona (United States)
Seiichi Mimura, Okayama Univ. (Japan)


Published in SPIE Proceedings Vol. 5541:
Penetrating Radiation Systems and Applications VI
F. Patrick Doty; Richard C. Schirato; H. Bradford Barber; Hans Roehrig, Editor(s)

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