TY - JOUR
T1 - Physical characteristics of a full-field digital mammography system
AU - Suryanarayanan, Sankararaman
AU - Karellas, Andrew
AU - Vedantham, Srinivasan
N1 - Funding Information:
This study was supported in part by the National Institutes of Health (NIH) grant RO1-CA88792 and RO1-EB002123 from the National Cancer Institute (NCI) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB), respectively. The contents are solely the responsibility of the authors and do not necessarily represent the official views of the NCI, NIBIB, the NIH or GE Medical Systems. The authors thank John M. Sandrik, PhD from GE Medical Systems and Carl J. D’Orsi, MD from Emory University School of Medicine for their comments and discussions. The authors thank Ms. Hetal Ved for technical assistance.
PY - 2004/11/11
Y1 - 2004/11/11
N2 - The physical performance characteristics of a flat-panel clinical full-field digital mammography (FFDM) system were investigated for a variety of mammographic X-ray spectral conditions. The system was investigated using 26 kVp: Mo/ Mo, 28kVp: Mo/Rh, and 30kVp: Rh/Rh, with polymethyl methacrylate (PMMA) "tissue equivalent material" of thickness 20, 45, and 60mm for each of three X-ray spectra, resulting in nine different spectral conditions. The experimental results were compared with a theoretical cascaded linear systems-based model that has been developed independently by other investigators. The FFDM imager (Senographe 2000D, GE Medical Systems, Milwaukee, WI) uses an amorphous silicon (aSi:H) photodiode (100 μm pixel) array directly coupled to a cesium iodide (CsI) scintillatori The spatial resolution of the digital mammography system was determined by measuring the presampling modulation transfer function (MTF). The noise power spectra (NPS) of the system were measured under the different mammographic X-ray spectral conditions at an exposure of approximately 10mR to the detector from which corresponding detective quantum efficiencies (DQE) were determined. The experimental results provide additional information on the performance of the mammographic system for a broader range of experimental conditions than have been reported in the past. The flat-panel imager exhibits favorable physical quality characteristics under the conditions investigated. The experimental results were compared with theoretical estimates under various spectral conditions and demonstrated good agreement.
AB - The physical performance characteristics of a flat-panel clinical full-field digital mammography (FFDM) system were investigated for a variety of mammographic X-ray spectral conditions. The system was investigated using 26 kVp: Mo/ Mo, 28kVp: Mo/Rh, and 30kVp: Rh/Rh, with polymethyl methacrylate (PMMA) "tissue equivalent material" of thickness 20, 45, and 60mm for each of three X-ray spectra, resulting in nine different spectral conditions. The experimental results were compared with a theoretical cascaded linear systems-based model that has been developed independently by other investigators. The FFDM imager (Senographe 2000D, GE Medical Systems, Milwaukee, WI) uses an amorphous silicon (aSi:H) photodiode (100 μm pixel) array directly coupled to a cesium iodide (CsI) scintillatori The spatial resolution of the digital mammography system was determined by measuring the presampling modulation transfer function (MTF). The noise power spectra (NPS) of the system were measured under the different mammographic X-ray spectral conditions at an exposure of approximately 10mR to the detector from which corresponding detective quantum efficiencies (DQE) were determined. The experimental results provide additional information on the performance of the mammographic system for a broader range of experimental conditions than have been reported in the past. The flat-panel imager exhibits favorable physical quality characteristics under the conditions investigated. The experimental results were compared with theoretical estimates under various spectral conditions and demonstrated good agreement.
KW - Amorphous silicon
KW - Breast cancer
KW - Detective quantum efficiency
KW - Digital mammography
KW - Flat-panel detectors
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U2 - 10.1016/j.nima.2004.05.128
DO - 10.1016/j.nima.2004.05.128
M3 - Article
AN - SCOPUS:7444233155
SN - 0168-9002
VL - 533
SP - 560
EP - 570
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 3
ER -