26 October 2004 DQE evaluation of a full-field digital mammography system
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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%.
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Hans Roehrig, Hans Roehrig, Kunal Gandhi, Kunal Gandhi, Jiahua Fan, Jiahua Fan, Ananth Poolla, Ananth Poolla, Seiichi Mimura, Seiichi Mimura, } "DQE evaluation of a full-field digital mammography system", Proc. SPIE 5541, Penetrating Radiation Systems and Applications VI, (26 October 2004); doi: 10.1117/12.565872; https://doi.org/10.1117/12.565872
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