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

Volume

53

Issue

6

fYear

2004

Firstpage

1479

Lastpage

1484

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2004.834590

Filename

1360085