Detector shape and arrangement for positron annihilation imaging

Details Detector shape and arrangement for positron annihilation imaging Detector shape and arrangement for positron annihilation imaging

1979-08-28

1981-09-22

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250367, G01T 120

Patent

active

042912288

ABSTRACT:
A circular array of detectors is used for detecting coincident events and the point of annihilation in a positron annihilation process in a selected plane wherein the output from the detectors is processed in a computer to provide image reconstruction for the selected plane. Bismuth germanate is shown to be more efficient than previously used detectors and the adaption of trapezoidal shape for the detectors enables more efficient utilization of the photons produced in the process. The use of absorbing metal reducing plugs between adjacent detectors may be used to decrease the aperture function of the detectors for low angles of incident radiation.

REFERENCES:
patent: 3225193 (1965-12-01), Hilton et al.
patent: 3621256 (1971-11-01), Cacheux et al.
patent: 4180737 (1979-12-01), Kingsley

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