模块化miniPET: 10和12个检测器模块之间的比较

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC) Pub Date : 2012-10-01 DOI:10.1109/NSSMIC.2012.6551594

A. Turco, I. Valastyán, M. Colarieti-Tosti

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引用次数: 0

摘要

通过计算机模拟，分析了两种10个检测器模块的小动物PET (r77-miniPET和r106-miniPET)的散射分数、空间分辨率和灵敏度，并与12个检测器模块的PET扫描仪miniPET II的性能进行了比较[1]。所有的模拟都是用经过验证的Geant4发射断层扫描应用程序(GATE)进行的[2]。灵敏度和散射分数有利于10模块扫描仪:计数率和散射分数明显改善。此外，低活动水平下的噪声等效计数率曲线斜率更陡。相反，在12模块扫描仪中发现空间分辨率更好。这里给出的令人鼓舞的结果特别涉及r77-miniPET:考虑到所有因素，如果检测器模块之间没有间隙，10检测器设计的性能优于miniPET II。在一个环中使用8个检测器模块进行的初步试验更加令人鼓舞，需要进一步评估。

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Modular miniPET: A comparison between 10 and 12 detector modules

By means of computer simulations, scatter fraction, spatial resolution and sensitivity of two 10-detector-module small-animal PET (r77-miniPET and r106-miniPET), are analyzed and compared to the performance of the 12-detector-module PET scanner miniPET II [1]. All simulations have been performed with the well validated Geant4 Application for Emission Tomography (GATE) [2]. Sensitivity and scatter fraction speak in favor of the 10-module scanner: a clear improvement in count rate and scatter fraction was found. Moreover, steeper slopes of noise equivalent count rate curves at low levels of activity was found. Spatial resolution instead was found to be better in the 12-module scanner. The encouraging results here presented particularly refer to r77-miniPET: all things considered, the 10-detector design behaves better than miniPET II if there are no gaps between detector modules. Preliminary trials performed with 8 detector modules in a ring are even more encouraging and need further assessment.

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2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)

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