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Proceedings Paper

Large-format photon-counting x-ray and gamma-ray imagers
Author(s): Jonathon R. Howorth; Martin B. Ingle; J. Ralph Powell; B. E. Patchett; Martin K. Carter; Peter David Read
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Paper Abstract

Photoemissive photon counting tubes of 40 mm diameter are routinely made, and 75 mm tubes are in development. When these tubes are coupled to a suitable scintillator, substantial quantum efficiency can be achieved from soft rays through to gamma energies. Available scintillators and their performance are described in this paper. The advent of fast PC compatible computers has enabled the electronics readout to be improved, simplified, and reduced in cost. The new electronic readout system is described, and the image processing capability outlined. The pulse height distribution is available to the user, and to a limited extent, this allows the user to measure the energy of the input photons to the system. Systems of this type are used for x-ray crystallography, and could find wider applications in nuclear medicine and gamma ray photography.

Paper Details

Date Published: 3 February 1993
PDF: 10 pages
Proc. SPIE 1736, X-Ray Detector Physics and Applications, (3 February 1993); doi: 10.1117/12.140483
Show Author Affiliations
Jonathon R. Howorth, Photek Ltd. (United Kingdom)
Martin B. Ingle, Photek Ltd. (United Kingdom)
J. Ralph Powell, Photek Ltd. (United Kingdom)
B. E. Patchett, Rutherford Appleton Lab. (United Kingdom)
Martin K. Carter, Rutherford Appleton Lab. (United Kingdom)
Peter David Read, Rutherford Appleton Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 1736:
X-Ray Detector Physics and Applications
Richard B. Hoover, Editor(s)

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