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引用次数: 22
摘要
提出了一种球形正电子发射层析成像仪(S-PET)，并对其性能进行了分析。计算机模拟和仿真研究表明，在可接受的成像时间和灵敏度下，可以实现空间分辨率为2 ~ 3 mm / whm的高分辨率、高灵敏度正电子发射层析成像。对16-24层的多层S-PET进行了具体分析，并与相应的圆柱形S-PET进行了比较。结果表明，在真散射比和随机比相同的情况下，球形系统的灵敏度增益是圆柱形系统的3倍。
Spherical positron emission tomograph (S-PET) I - performance analysis
A spherical positron emission tomograph (S-PET) is proposed and its performance analyzed. Computer modelling and simulation studies indicate that a high resolution and high sensitivity positron emission tomograph having a spatial resolution of 2–3 mm fwhm can be realized with acceptable imaging time and sensitivity.
Multilayer S-PET having 16–24 layers is specifically analyzed and compared with its corresponding cylindrical counterpart. The result shows that the sensitivity gain of the spherical system is a factor 3 over the cylindrical system with identical true to scatter and random ratios.
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