Siemens Medical Solutions USA, Inc.

Cti Pet Systems, Inc.

Timothy G Gremillion

Michael E Casey

Vladimir Y Panin

James J Hamill

Mu Chen

Mark W Lenox

Wing K Luk

Charles H Hayden, Jr

Stephen Miller

A representative positron emission tomography (PET) calibration system includes a PET scanner having a ring detector, a phantom that is placed at approximately the center of the ring detector, and a time alignment calibration manager that is coupled to the PET scanner. The time alignment calibration manager detects coincidence events from the phantom, calculates position of time of flight events from the ring detector based on the detected coincidence events, and calculates time offsets for the ring detector using a mean value calculation based on the calculated position of the time of flight events.

Systems and methods for calibrating time alignment for a positron emission tomography (PET) system

Apparatus and methods for simulating a sheet source with a line source for determining normalization coefficients for the detectors in positron emission tomography (PET) scanners and single photon emission computed tomography (SPECT) scanners. A line source, oriented perpendicular to the axis of a scanner gantry, is moved along the axis while the detectors are stationary and positioned substantially parallel to the plane in which the source moves. In another embodiment, an axially mounted line source moves parallel to a diameter of the gantry while the stationary detectors are positioned substantially parallel to the plane in which the source moves. In still another embodiment, the line source is stationary and positioned parallel to the gantry axis and off center while the detectors move relative to the line source. A shaped attenuator is placed around the source in this last embodiment.

Normalization apparatus for PET and SPECT scanners and method for using same

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Knoxville, TN, United States of America

Timothy G Gremillion