利用PET图像研究脑功能常用感兴趣区法，但随机误差大；
The region of interesting method(ROI) is commonly used to analyze brain function by PET image, but which may cause random errors.
利用PET图像研究脑功能常用感兴趣区法，但随机误差大；
The region of interesting method(ROI) is commonly used to analyze brain function by PET image, but which may cause random errors.
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