DQE evaluation of a full-field digital mammography system

Hans Roehrig; Kunal Gandhi; Jiahua Fan; Ananth Poolla; Seiichi Mimura

doi:10.1117/12.565872

26 October 2004 DQE evaluation of a full-field digital mammography system

Hans Roehrig, Kunal Gandhi, Jiahua Fan, Ananth Poolla, Seiichi Mimura

Proceedings Volume 5541, Penetrating Radiation Systems and Applications VI; (2004) https://doi.org/10.1117/12.565872
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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%.

Citation Download Citation

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

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