Quantitative SUV measurement from early and delayed parathyroid SPECT-CT imaging is feasible, with the best result achieved by experienced operators using delayed CT in manual registration.
Positron Emission Tracking (PeTrack) is a new real-time 3D tracking technique. The project studied the sensitivity and distortion of the PeTrack system with four different detector field of view (FOV) configurations using Monte-Carlo simulation software (GATE). The simulation studies demonstrated the clear boundaries for FOV and also revealed a local distortion up to 1 mm for PeTrack. The simulation also showed that the detector misalignment could introduce the distortion to the system. The amplitude of the distortion is approximately the half of the misalignment at the center of the FOV. The results of simulations lead us to calibrate the PeTrack system to obtain the global scaling factors. However, since PeTrack has a nonuniform distortion across FOV, the global scaling factors were helpful to only some extent. The xi xi List of Tables 4.1: Part of the calibration data on x-z and x-y planes………………………………………..….53 4.2: The results of the fitting for x-y and x-z planes …………………………………...….…….55 4.3: Comparison of applying scaled factor on deviation between experimental and grid data ………………………………………………………………………………..….…….57
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