Method of and means for compensating for the dead time of a gamm

Details Method of and means for compensating for the dead time of a gamm Method of and means for compensating for the dead time of a gamm

1982-11-04

1986-02-25

Wise, Edward J.

Boots, shoes, and leggings

364571, 250363S, G01T 120

Patent

active

045731225

ABSTRACT:
A method for using a gamma camera having a head including an array of photodetectors that produces a group of input pulses in response to an actual interaction of a radiation stimulus with the camera head, includes the step of repetitiously generating groups of synthetic pulses that resemble groups of input pulses and simulate the occurrence of synthetic interactions of stimuli with the head. These groups of synthetic and input pulses are applied to processing circuitry that produces groups of processed pulses. The coordinates of both actual and synthetic interactions based on said processed pulses are computed; and a representation of the spatial locations of both actual and synthetic interactions based on the computed coordinates is stored.
The method also includes determining whether a group of processed pulses is the result of a group of input pulses or a group of synthetic pulses, and a correction factor is computed based on the number of groups of processed synthetic pulses relative to the number of groups of generated synthetic pulses. The representation of the spatial locations of the interactions is corrected in accordance with said correction factor.

REFERENCES:
patent: 3732420 (1973-05-01), Brunnett et al.
patent: 4058728 (1977-11-01), Nickles
patent: 4095108 (1978-06-01), Imbar et al.
patent: 4115694 (1978-09-01), Lange et al.
patent: 4179607 (1979-12-01), Lange et al.
patent: 4223221 (1980-09-01), Gambini et al.

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