Optimization of the Compton camera for measuring prompt gamma rays in boron neutron capture therapy

Optimization of the Compton camera for measuring prompt gamma rays (0.478 MeV) emitted during boron neutron capture therapy (BNCT) was performed with Geant4. The parameters of the Compton camera were determined as follows: 3 cm thick - 10 cm wide scatter detector (Silicon), 10 cm thick - 10 cm wide absorber detector (Germanium), and 1 cm distance between the scatter and absorber detectors. For a typical brain tumor treatment, the overall detection efficiency of the optimized Compton camera was approximately 0.1425% using the Snyder's head phantom with a sphere tumor (4 cm diameter and ~1 cm depth).