Savy L E, Moseley I F
Lysholm Department of Radiology, National Hospital for Neurology and Neurosurgery, London, UK.
Br J Radiol. 1996 May;69(821):394-401. doi: 10.1259/0007-1285-69-821-394.
Calcification of the major intracranial arteries is frequently observed on computed tomography (CT), particularly in the carotid siphon, and has been implicated as a causative factor in low tension glaucoma. Ectasia of the carotid siphon has also been postulated as a possible cause of compressive optic neuropathy. 153 patients, in whom high resolution CT of the orbits and parasellar region had been performed for suspected anterior visual pathway pathology, were retrospectively reviewed. The presence and severity of calcification and ectasia of the major intracranial arteries was recorded. There was a high occurrence of carotid siphon calcification, increasing with age, and independent of sex or race. Calcification was very rare in anterior cerebral, middle cerebral and basilar arteries in all age groups. The amount and degree of ectasia also increased with advancing age, and was more frequently observed in carotid and basilar than anterior and middle cerebral arteries. There was no correlation between the degree of calcification or ectasia and ophthalmological or neurological deficit.
在计算机断层扫描（CT）上经常观察到颅内主要动脉钙化，尤其是在颈内动脉虹吸部，并且被认为是低眼压性青光眼的一个致病因素。颈内动脉虹吸部扩张也被假定为压迫性视神经病变的一个可能原因。对153例因疑似前视觉通路病变而进行眼眶和鞍旁区域高分辨率CT检查的患者进行了回顾性研究。记录了颅内主要动脉钙化和扩张的存在情况及严重程度。颈内动脉虹吸部钙化发生率很高，随年龄增长而增加，且与性别或种族无关。在所有年龄组中，大脑前动脉、大脑中动脉和基底动脉钙化非常罕见。扩张的数量和程度也随年龄增长而增加，在颈内动脉和基底动脉中比在大脑前动脉和大脑中动脉中更常观察到。钙化或扩张程度与眼科或神经功能缺损之间没有相关性。
