Initial Investigation of Geometric Sensitivity by Gate for Oscillation Motion Correction in 3D Pet

The positron emission tomography (PET) image quality can be degraded due to motion. In this paper, we present a new data-driven method for oscillation motion compensation that utilizes the geometric sensitivity feature of a 3D-PET scanner system operating in list event acquisition mode. The count rate from a given organ will depend on the axial location of the organ due to the geometric sensitivity. As a result the oscillation motion transforms to the reference frame can be determined from count rate changes which are determined to suitable temporal resolution from the list-mode data stream. This method only uses LOR events and is noninvasive, no additional hardware device systems are required. Simulation result demonstrates that the geometric sensitivity correction (GSC) method is able to reduce oscillation motion degradation.