Optimization of Cd1-xZnxTe Detectors for Digital Radiography
G. C. GIAKOS, B. PILLAI, S. VEDANTHAM, S. CHOWDHURI, A. DASGUPTA, R. B. RICHARDSON, P. GHOTRA, R. J. ENDORF, A. PASSALAQUA, AND W. J. DAVROS
ABSTRACT
In this study, measurements of the electrical and detection parameters of the Cd1-xZnxTe detectors, within the x-ray diagnostic energy range, have been performed with the aim of optimizing the image quality parameters of these solid-state-ionization detectors. Namely, the leakage current and system capacitance of the x-ray imaging system have been measured as they relate to signal parameters. Similarly, the detected signal and noise contributions were measured and related to the radiation exposure and tube current setting. Furthermore, the detector contrast has been experimentally determined. The experimental results indicate that Cd1-xZnxTe detectors have low leakage current, high resistivity, and high detector contrast resolution. Therefore, they appear to be very attractive for imaging applications with applications in x-ray digital radiography.
Publication Source: Journal of X-Ray Science and Technology, ISSN: 0895-3996. Volume 8, Number 2, 1998. Pages: 37... Publisher:IOS Press - Amsterdam
