Method for rapid localization of a scintillation event in a gamm

Details Method for rapid localization of a scintillation event in a gamm Method for rapid localization of a scintillation event in a gamm

1992-09-04

1994-03-08

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036307, 250366, G01T 117

Patent

active

052930440

ABSTRACT:
In a process for localizing a scintillation event in a gamma camera having a plurality of photomultipliers forming a camera surface, each photomultiplier generating an output signal in response to the scintillation event, wherein a plurality of comparative signal sets are generated from output signals of the photomultiplier corresponding to respective scintillation events of known location, a location-dependent probability function is formed based on a comparison of the outputs of the photomultipliers for a scintillation event of unknown location with the comparative signal sets, and the location of the scintillation event of unknown location is defined as the location corresponding to the maximum of the probability function, the speed with which the localization is accomplished is increased by initially defining a portion of the total gamma camera surface in which there is a high probability that the location of the scintillation event of unknown origin lies, and limiting the investigation for the location of the scintillation event of unknown location to that portion of the camera surface, with increasing precision.

REFERENCES:
patent: 4228515 (1980-10-01), Genna et al.
patent: 4437160 (1984-03-01), Blum
patent: 4654795 (1987-03-01), Shimoni
patent: 4881171 (1989-11-01), Jatteau et al.
Seeger, "A Fast Parallel Encoding Scheme for the Anger Camera", IEEE Transaction on Nuclear Science, vol. NS-31, No. 1, Feb. 1984, pp. 274-280.
"A Full-Field Modular Gamma Camera," Milster et al., J. Nucl. Med., vol. 31, No. 4, Apr. 1990, pp. 632-638.

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