Gamma camera stabilizer

Details Gamma camera stabilizer Gamma camera stabilizer

1997-12-31

1999-12-28

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

2502521, 378207, G01T 1161

Patent

active

060084944

ABSTRACT:
An apparatus and method to be used with a gamma camera for identifying and compensating for photomultiplier tube gain drift wherein a photon source is used during a customer quality control flood procedure to direct photons toward the camera and wherein the source is known to generate approximately identical numbers of photons at energies within an acquisition range of energy levels, the acquisition range having a mid-value at energy level Z, the camera is used to generate an upper image using photons having energies above level Z and within the acquisition range and to generate a lower image using photons having energies below level Z and within the acquisition range, the upper and lower images are used to identify PMTs with incorrect gain, identify gain error and then compensate for the error.

REFERENCES:
patent: 4583187 (1986-04-01), Stoub
patent: 5449897 (1995-09-01), Bertelsen et al.
patent: 5550377 (1996-08-01), Petrillo et al.

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