Ruscalleda J, Guardia E, dos Santos F M, Carvajal A
Neuroradiology. 1980 Dec;20(4):185-9. doi: 10.1007/BF00336680.
Intracranial arachnoid cyst do not usually present diagnostic problems when studied by CT, since they appear as low density images similar to those produced by CSF, do not change on intravenous contrast perfusion, and are located extraparenchymatously. Sometimes, however, their diagnosis can become difficult or doubtful mainly in cases of deep, basal or paramedian cysts [12, 18, 22, 24]. On the other hand, the functional or dynamic aspects of these structures remain unknown when the study is limited to simple CT. Computed cisternography with metrizamide (CCM) and time control will not only show the relationship between these structures and the arachnoid space but also their dynamic aspect, which may determine the surgical treatment.
颅内蛛网膜囊肿在进行CT检查时通常不会出现诊断问题，因为它们表现为低密度影像，类似于脑脊液产生的影像，静脉注射造影剂后无变化，且位于脑实质外。然而，有时其诊断可能会变得困难或存疑，主要见于深部、基底或旁正中囊肿的情况[12, 18, 22, 24]。另一方面，当研究仅限于简单的CT时，这些结构的功能或动态方面仍不为人知。使用甲泛葡胺的脑池造影CT（CCM）及时间控制不仅能显示这些结构与蛛网膜下腔的关系，还能显示其动态方面，这可能决定手术治疗方案。
