Paramedical Sciences and Military Health

Introduction: The quality control of the SPECT system plays an important role in the interpretation and reporting of images. For this purpose, evaluation tests of quality control are performed to detect problems in the scanner, before the negative impact on medical images. Performing quality control tests and various simulations are vital and effective to determine the defects of the system.
Methods and Materials: In this study, first, the SYMBIA T scanner was simulated with SIMIND Monte Carlo code, and spatial resolution and sensitivity parameters were measured based on experimental conditions. Then, the acquired results were analyzed, compared, and validated with experimental results.
Results: The spatial resolution as experimental and simulation in field of view (FOV) were measured 4.73 mm and 4.4 mm, respectively. Furthermore, the sensitivity calculated by simulation and experiment for 126-154 keV energy windows was equal to 46.27 cps/MBq and 47.98 cps/MBq. The relative errors for spatial resolution and sensitivity were measured 7% and 3%, respectively.
Discussion and Conclusion: The error quantity indicates a good agreement between the experimental and the simulation data. Using this simulation, the quality control parameters can be predicted before performing the experimental quality-control tests. Thus, the cost, radiation safety, shielding requirements and error in the system images are significantly minimized.