Method of calibrating a gamma camera, and a gamma camera includi

Details Method of calibrating a gamma camera, and a gamma camera includi Method of calibrating a gamma camera, and a gamma camera includi

1982-06-18

1985-05-14

Howell, Janice A.

Radiant energy

Calibration or standardization methods

378207, G01D 1800

Patent

active

045174601

ABSTRACT:
A gamma camera is provided with a calibration device which samples the output signal of a photomultiplier tube/amplifier combination. After sampling, the calibration device determines a mean amplitude from the amplitudes of the samples with the mean amplitude being compared with a reference value, and the gain factor of the amplifier is corrected in order to eliminate a relative discrepancy occurring between the mean value and the reference value. To achieve this, the calibration device comprises a point source, a diaphragm with holes which are situated exactly in front of the centers of the photomultipliers, and a circuit which is controlled by a microprocessor for the sequential calibration of the amplifiers.

REFERENCES:
patent: 3515878 (1970-06-01), Ried, Jr. et al.
patent: 3903417 (1975-09-01), Peter
patent: 4179607 (1979-12-01), Lange et al.
patent: 4223388 (1980-09-01), Nishikawa et al.
patent: 4228515 (1980-10-01), Genna et al.

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