Partial Septa Design
Septa Configurations
Conventional PET cameras operate in 3D acquisition mode (no-septa) or 2D acquisition mode (all-septa-in). We used the MDAPET camera in brain configuration to search for partial-septa designs to minimize the scatter and accidental coincidences with acceptable sensitivity loss. The figure above shows the axial view of the MDAPET detector module for three septa configurations: (a) no-septa, (b) 7-septa-in, (and (c) 5-septa-in.
Comparison of Septa Configurations
Comparison of the measured (solid lines) and simulated (dots) NEC Rates for three septa configurations
Hoffman Brain Phantom Comparison
A reconstructed image slice of the Hoffman brain phantom for (a) no-septa and (b) 5-septa configurations. The total true coincidence events acquired were 74 million and 51 million in no-septa and 5-septa configurations (for the same acquisition time).