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28 May 1999 CCD-based detector for full-field digital mammography
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We describe a 19 X 28 cm digital x-ray detector for use in clinical screening mammography. The detector design uses 6 CCD/taper modules tiled together to provide a full breast image without any image gaps at the tapers interfaces. We have attempted to limit the cost and mechanical complexity of the detector while maintaining a high DQE and a resolution cutoff of 10 lp/mm. The camera design employs a Gd2O2S phosphor x-ray converter, 3.3:1 demagnifying fiber optic tapers, and front-illuminated Thomson THX 7899 CCDs (2048 X 2048, 14 micrometer pixels) coupled to the tapers with optical epoxy. The effective pixel size in the 4000 X 6000 pixel full image is 47 micrometer. The signal for each pixel is digitized to 16-bits and the effective dynamic range is approximately 9000. Readout time for the 48 Mbyte image is 8s. Each CCD is cooled to -3 degrees Celsius by a thermoelectric (TE) cooling module.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Martin J. Stanton, Walter Charles Phillips, Alexander X. Stewart, Laura B. Smilowitz, Mark Bennett Williams, Piero Simoni, Charles Ingersoll, Thomas G. McCauley, and Hua Qian "CCD-based detector for full-field digital mammography", Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999);


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