用螺旋CT血管造影多轴向投照容积重建检查颅内动脉瘤

目的；探讨螺旋CT血管造(SCTA)多轴向投照容积重建（MPVR）在颅内动脉瘤检查中的合理应用。方法：11例临床拟诊颅内动脉瘤的患者行SCTA检查，每例均用MPVR法成像。结果：MPVR正确检同前交通动脉瘤5例，右后交通动脉瘤1例，基底动脉瘤1例，4例阴性。结论：针对颅内动脉瘤的好发部位，用MPVR法合理选择薄片厚度、中心线和旋转角度、窗中心，能完整地显示脑底动脉环（Willis环）和颈内、基底动脉主干及其主要分支，提高脑动脉瘤检出率。

Detection of intracranial aneurysms with spiral CT angiography and MPVR

Objectives:To explore the optimal method of spiral CT angiography and MPVR in the detection of intracranial aneurysms. Methods:Eleven patients with clinical suspicion of intracranial aneurysms underwent spiral CT angiography, then postprocessed with MPVR. Results:,Five anterior communicating aneurysms,1 posterior communicating aneurysm and 1 base aneurysm were found with MPVR. Conclusions: Lesions at the circle of Willis, the main trunk of the carotid and the vertebrobasilar arteries, including their branches could be visualized perfectly with MPVR by optimizing the thickness, center, angle of rotation and window level, by which more intracranial aneurysms could be found.