Patent ID: 7375338

Claim:
A method of adjusting performance of an imaging system, comprising: removing a slit aperture collimator from the imaging system, the imaging system comprising the slit aperture collimator, at least one of a crossed-slit collimator disposed circumferentially about the slit aperture collimator or a septa assembly having one or more septa spaced circumferentially about the slit aperture collimator, and a detector assembly configured to detect collimated gamma rays emanating from a subject in a field of view of the imaging system, wherein the slit aperture collimator is coupled to a collimator support base disposed on a side of the detector assembly, wherein the collimator support base is coupled to a motor to enable rotation of the slit aperture collimator, and wherein the collimator support base is adapted to be moved axially from a region of the imaging system surrounded by the detector assembly; removing either the crossed-slit collimator or the septa assembly from the imaging system; and inserting a pinhole aperture collimator into the imaging system.