Design and performance evaluation of a focused multi-pinhole collimator for myocardial perfusion imaging with SPECT
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عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
This study aims to design and evaluate the performance of a multi-pinhole collimator offering high sensitivity and high resolution for myocardial perfusion SPECT imaging. Monte Carlo simulation using GATE was performed to assess various configurations. The multi-pinhole collimator comprises 8 apertures focused towards the heart. The spatial resolution was compared for different diameters of lead, tungsten, and gold apertures for 99mTc point-source imaging. The findings demonstrated that the gold outperforms the conventional lead and tungsten as collimator material. The multi-pinhole collimator shows an inferior performance compared to the pinhole in terms of spatial resolution. It is concluded that for high-quality cardiac SPECT imaging with multi-pinhole collimator gold can be the material of choice.