To study the depression of occipital arachnoid granulation by normal CT scans.
通过正常颅脑CT扫描图像，对枕骨蛛网膜颗粒压迹进行研究。
Conclusion Arachnoid granulation is a kind of normal structure. It has no correction with clinical manifestation. It has characteristics of imaging.
结论蛛网膜颗粒是一种正常解剖结构，通常与临床表现无关，有影像学特征表现。
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