24 July 1998 Detection characterization of Cd1-xZnxTe detectors for x-ray linear arrays
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Abstract
In this paper, the detected signal-to-noise was measured and related to the tube current (mA) setting. The line spread function amplitude (LSF) dependence on drift distance of a 3 mm thick detector, for 100 kVp, 100 mA, with an applied electric field of 50 V/mm, and 100 V/mm, were measured. In addition, the dependence of the modulation transfer function [MTF(f)] of the x-ray detector system on the applied bias voltage has been experimentally determined. The experimental setup, although is not offered for large field-of-view imaging applications, offers capabilities for feasibility studies, research and evaluation of the temporal response and noise characteristics of a Cd1-xZnxTe detector, for fast digital radiographic and CT applications. The experimental results indicate that Cd1-xZnxTe detectors exhibit both a high signal-to-noise ratio and linear response, as well as a good spatial resolution within the diagnostic energy range. Tor system improves both with increasing applied bias voltage and decreasing detector thickness. A study is in process aimed at improving the spatial resolution of the x-ray system by suitable optimization of the system geometry as well as the system temporal response.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
George C. Giakos, George C. Giakos, Srinivasan Vedantham, Srinivasan Vedantham, Sankararaman Suryanarayanan, Sankararaman Suryanarayanan, Samir Chowdhury, Samir Chowdhury, Ravi K. Guntupalli, Ravi K. Guntupalli, J. Odogba, J. Odogba, Amlan Dasgupta, Amlan Dasgupta, Bindu Pillai, Bindu Pillai, Robert J. Endorf, Robert J. Endorf, "Detection characterization of Cd1-xZnxTe detectors for x-ray linear arrays", Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); doi: 10.1117/12.317056; https://doi.org/10.1117/12.317056
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