Contrast Study of CdZnTe Detectors for Digital Mammography
G. C. GIAKOS, B. PILLAI, S. CHOWDHURY, S. VEDANTHAM, A. DASGUPTA, D. B. SHEFFER, W. J. DAVROS, A. PASSALAQUA, AND R. J. ENDORF
ABSTRACT
Experiments have been performed with the aim of optimizing the image quality parameters of CdZnTe detectors for digital mammography. A geometrical breast phantom has been designed, and the dependence of the contrast resolution of a planar CdZnTe detector on the phantom thickness has been experimentally determined. Specifically, the detected signal and noise contributions were measured and related to phantom thickness. The results of this study indicate that the CdZnTe detectors exhibit a high contrast resolution. On the other hand, the dynamic range of this detector can be improved significantly by further implementation of the data acquisition electronics.
Publication Source: Journal of X-Ray Science and Technology, ISSN: 0895-3996. Volume 8, Number 2, 1998. Pages: 317... Publisher:IOS Press - Amsterdam
