Multiple sensor position locating system

Details Multiple sensor position locating system Multiple sensor position locating system

1986-06-20

1989-07-25

Lall, Parshotam S.

Boots, shoes, and leggings

364527, 364571, 364518, 250363R, 250369, G06F 1520, G01T 120

Patent

active

048520560

ABSTRACT:
A system for locating the position of a source of a detachable emittance is particularly adapted for locating the position of a scintillation event in a scintillation crystal which has arranged adjacent thereto a plurality of photomultiplier tubes arranged in a predetermined configuration for detecting the scintillation event. In a single photon emission computer tomography (SPECT) embodiment, a system which utilizes the present invention is initialized by storing weighting factors which are derived from placing a source of radiation in a plurality of known locations. The output values of the photomultiplier tubes are stored in a calibration file and subjected to a mathematical process to produce the weighting factors which are subsequently stored in a memory. During operation of the system, the signal values from the photomultiplier tubes are combined with the weighting factors to produce weighted signals which are then summed together to produce a composite weighted signal. The addresses of the weighting factors are correlated to position information; the correct position information being determined in response to the composite weighted signal assuming a predetermined value.

REFERENCES:
patent: 4593198 (1986-06-01), Pang et al.
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Burnham et al., "Application of a One Dimensional Scintillation Camera in a Positron Tomographic Ring Detector," IEEE Trans. on Nuclear Science, vol. NS-29, p. 461, 1982.
Milster et al., "Digital Position Estimation for the Modular Scintillation Camera," IEEE Trans. on Nuclear Science, vol. NS-32, No. 1, p. 748, Feb., 1985.
Kurz et al., "One- and Two-Dimensional Position Sensitive Scintillation Detectors for Thermal Neutrons," IEEE Trans. on Nuclear Science, vol. NS-32, No. 1, p. 453, Feb., 1985.
Gray et al., "Maximum A Posteriori Estimation of Position in Scintillation Cameras," IEEE Trans. on Nuclear Science, vol. NS-23, No. 1, p. 849, Feb., 1976.
Burnham et al., "One Dimensional Scintillation Cameras For Positron ECT Ring Detectors," IEEE Trans. on Nuclear Science, vol. NS-28, No. 1, Feb., 1981.

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