Development of an optical fiber based MR compatible gamma camera for SPECT/MRI system

光纤是集成PET/MRI系统的一种有前途的材料。然而，尚不清楚这种材料是否可用于SPECT/MRI系统。我们研制了一种用于SPECT/MRI系统的基于光纤的块检测器，并对其性能进行了测试。1.2 X 1.2 X 6 mm Y2 SiO 5（YSO）像素组合以形成15 X 15块并耦合到光纤图像引导件。图像引导件具有22 mm X 22 mm矩形输入和输出。基于光纤的图像引导的输入被弯曲90度，并且输出被光学耦合到1平方英寸的高量子效率位置敏感光电倍增管（HQE-PSPMT）。平行孔准直器由钨塑料制成，安装在YSO块上。内在和系统性能进行了评价。系统在距准直器表面1.5mm处的分辨率为1.7mmFWHM，灵敏度为0.06%。我们的结论是，开发的光纤为基础的YSO块探测器是有前途的SPECT/MRI系统。

Optical fiber is a promising material for integrated PET/MRI systems. However, it is unclear this material can be used for a SPECT/MRI system. We developed and tested an optical fiber based block detector for SPECT/MRI system and tested its performance. 1.2 x 1.2 x 6mm Y2SiO5 (YSO) pixels were combined to form a 15 x 15 block and coupled to an optical fiber image guide. The image guide had a 22mm x 22mm rectangular input and an output. The input of the optical fiber based image guide was bent for 90 degree and the output was optically coupled to a 1-inch square high quantum efficiency position sensitive photomultiplier tube (HQE-PSPMT). Parallel hole collimator made of tungsten plastic was mounted on the YSO block. Intrinsic and system performance were evaluated. The system resolution was 1.7mm FWHM at 1.5mm from the collimator surface, and the sensitivity was 0.06%. We conclude that developed optical fiber based YSO block detector is promising for SPECT/MRI system.