High DQE performance X-and gamma-ray fast imagers:: Emergent concepts

Challenges for the design of quantum sensitive 2D imaging detectors for high-energy photons are reviewed. Conception rules and universal data plot are presented. They allow the optimization of pixel dimensions versus incident fluence and the contrast of the radiant image for several interesting mate...

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Bibliographic Details
Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 422; no. 1; pp. 649 - 655
Main Author Gerstenmayer, Jean-Louis
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1999
Subjects
2D imaging detectors
BGO
CdZnTe
Gaseous detector
Image quality
Photoconductor
X-ray imaging
29.40.G
Photoconductor
29.40.C
CdZnTe
BGO
X-ray imaging
29.40.W
Image quality
2D imaging detectors
Gaseous detector
81-05D
87.59
29.40.M
87.57.C
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Summary:Challenges for the design of quantum sensitive 2D imaging detectors for high-energy photons are reviewed. Conception rules and universal data plot are presented. They allow the optimization of pixel dimensions versus incident fluence and the contrast of the radiant image for several interesting materials such as photoconductors, scintillators and metallic X-converters. Firstly, a 2D very sensitive CdZnTe imaging matrix and its performance are presented. Secondly, the performance of a large size gaseous detector (Parallel Plate Avalanche Chamber), coupled with a structured high stopping power metallic X-ray converter are reviewed. Finally, we make comparison to performances obtained with more classical technologies made of segmented heavy scintillators.
ISSN:0168-9002
1872-9576
DOI:10.1016/S0168-9002(98)01011-0