Detection characterization of Cd1-xZnxTe detectors for x-ray linear arrays

G. C. Giakos, S. Vedantham, S. Suryanarayanan, S. Chowdhury, R. Guntupalli, J. Odogba, A. Dasgupta, B. Pillai, R. J. Endorf

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


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 3mm thick detector, for 100 kVp, 100 mA, with an applied electric field of 50V/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.

Original languageEnglish (US)
Pages (from-to)537-545
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1998
Externally publishedYes
EventMedical Imaging 1998: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 22 1998Feb 24 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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