Title :
Detective quantum efficiency [DQE(0)] of CZT semiconductor detectors for digital radiography
Author :
Giakos, G.C. ; Suryanarayanan, S. ; Guntupalli, R. ; Odogba, J. ; Shah, N. ; Vedantham, S. ; Chowdhury, S. ; Mehta, K. ; Sumrain, S. ; Patnekar, N. ; Moholkar, A. ; Kumar, V. ; Endorf, R.E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Akron, OH, USA
Abstract :
In this paper, the detective quantum efficiency (DQE) of cadmium zinc telluride (CZT) detector samples for digital radiography has been measured. Specifically, this study is aimed at investigating the zero-frequency DQE(0) under different X-ray tube and detector parameters. The experimental results of this study indicate that the DQE(0) of the CZT samples is strongly dependent upon the irradiation geometry. This is attributed to the incomplete charge collection process, which can be further improved by controlling the purity of the samples and the contact type.
Keywords :
X-ray tubes; cadmium; radiography; semiconductor counters; tellurium; zinc; CdZnTe; X-ray tube; cadmium zinc telluride; charge collection process; detective quantum efficiency; detector parameters; digital radiography; irradiation geometry; semiconductor detectors; zero-frequency DQE(O); Biomedical imaging; Cadmium compounds; Detectors; Image sensors; Photoconductivity; Radiography; Sensor arrays; X-ray detection; X-ray imaging; Zinc compounds; 65; Detective quantum efficiency; digital radiography; semiconductor detectors;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2004.834590
