Gamma camera stabilizer

摘要

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.