Methods: 18 cases with CT angiography were analyzed with several post-processing techniques including thin slab volume rendering (VR) and thin slab maximum intensity projection (MIP).

• 方法：对18例CT脑血管造影病例进行多种后处理重建，包括选择性容积再现成像(VR)，选择性最大密度投影成像(MIP)。