Scintillation camera valid event discrimination

Details Scintillation camera valid event discrimination Scintillation camera valid event discrimination

1992-05-07

1993-12-14

Dzierzynski, Paul M.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036307, G01T 1161

Patent

active

052705471

ABSTRACT:
The discriminator comprises a summing circuit for producing a sum signal from light detectors of a scintillation camera; a slope analysis circuit for analyzing a slope of the sum signal to produce a slope analysis result indicative of a given characteristic change in the slope; a first event characteristic evaluation circuit for producing in response to the slope analysis result and the sum signal a first event characteristic signal representative of an energy of the first event; a second event characteristic evaluation circuit for producing in response to the slope analysis result and the sum signal a second event characteristic signal representative of an energy of the second event; and a validity analyzer circuit for producing a valid event indicator signal in response to the slope analysis result, the first event characteristic signal and the second event characteristic signal. A method of pulsepile discrimination is also disclosed. The valid event indicator signal can indicate the presence of simultaneous events and the number of valid events among the simultaneous events.

REFERENCES:
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patent: 4612443 (1986-09-01), Alcidi
patent: 4677300 (1987-06-01), Tawil et al.
patent: 4812656 (1989-03-01), Yamakawa et al.
patent: 4882680 (1989-11-01), Bonnefoy-Claudet et al.
patent: 4899054 (1990-02-01), Barford

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