Multiple scattering imager for photon therapy

摘要: During radiation therapy, it is necessary to monitor the irradiated position and energy deposited in patient. In general, calculations before photon exposure or 2D measurement of transmitted photons have been widely used for dose estimation. this research, we propose real-time 3D using Compton imaging technology. On basis Monte-Carlo method, designed a multiple scattering camera system (MSCC) with semiconductor scintillation detectors. The MSCC was constructed two detectors as scatter CWO scintillator detector an absorber detector. planar arrays consisted 40 × pixels, each size 1 1× thickness mm3, other array mm3. design parameters such types semiconductors, thicknesses distances between were optimized on detection efficiency angular resolution reconstructed images point source. Under conditions, uncertainty factors geometry estimated various inter-detector distances. We source corresponding scattered from water phantom exposed 6-MeV peak X-ray. According our simulation results, figure merit (FOM) reached its maximum value when distance 3 cm. order achieve high FOM, chose cm optimum caused by pixelization effect major factor degrade degradation broadening less than expected. uncertainties Doppler incorrect sequencing minimal compared that pixelization. Our showed feasibility based therapy.