文章基本信息

标题：Optimization Technique for a Prompt Gamma-ray SPECT Collimator System
其他标题：Optimization Technique for a Prompt Gamma-ray SPECT Collimator System
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作者：MASAYORI ISHIKAWA ; TOORU KOBAYASHI ; YOSHINORI SAKURAI 等
期刊名称：Journal of Radiation Research
印刷版ISSN：0449-3060
电子版ISSN：1349-9157
出版年度：2001
卷号：42
期号：4
页码：387-387
DOI：10.1269/jrr.42.387
摘要：Because background radiation in an irradiation room creates a problem with the PG-SPECT (Prompt Gamma-ray Single Photon Emission Computed Tomography) system, which evaluates the absorbed dose for the Boron Neutron Capture Therapy treatment, optimization of a collimator system was performed while taking the shielding of background gamma-rays into consideration. Assuming that a parallel-beam collimator is used, three parameters - the diameter of a hole, the length of the collimator, and the number of detectors (the number of holes of the collimator) - were selected for optimization. Because the combinations of these parameters are limitless, it is difficult to determine them simultaneously. Therefore, a statistically derived Optimization Criterion has been proposed to optimize these parameters. When the spatial resolution was 1 cm-FWHM (full width at half maximum), the optimal diameter of the collimator was 5.4 mm, the optimal length was 321 mm, and the optimal number of detectors was 31 × 31.
关键词：Prompt Gammra-ray SPECT (PG-SPECT);Dosimetry;Boron Neutron Capture Therapy;Collimator system;Optimization technique