Evaluated by VRT image, the image quality of 79.7% of the patients were first class, 10.1% second class, and 10.1% third class.

• 用VRT重建像评价图像质量 79 7%25 (5 5例 )为 1级 ,10 1%25 (7例 )为 2级 ,10 1%25为 3级。