三维CT血管造影诊断脑血管病变的临床应用

目的：研究螺旋CT血管造影诊断脑血管病变的临床应用价值。材料和方法：选择临床上经DSA证实的12例（共15个病灶）脑血管病变的患者行三维CTA检查。采用表面遮盖显示法（SSD）、最大密度投影法（MIP）和伪彩技术观察脑血管病变的立体形态和空间毗邻关系；采用仿真内镜技术和透明化技术相结合观察病变血管的内部情况；并应用电影功能快速回放以动态观察。结果：三维CTA对15个病灶中除1个动脉狭窄未能显示外，其余病变能清晰辨认，包括6个动脉瘤，6个动静脉畸形，1个动脉狭窄，1个颈内动脉海绵窦瘘。结论：三维CT血管造影作为一种血管病变的诊断，并有其临床应用价值。

Clinical Application of Three Dimensional CT Angiography in Cerebral Vascular Diseases

To assess the clinical value of three dimensional CT angiography (CTA) in cerebral vascular diseases. Materials and Methods: Spiral CT was used in 12 cases with 15 lesions of cerebral vascular diseases. Three dimensional (3D) images were reconstructed with several reconstruction techniques, such as shaded surface display (SSD), maximum intensity projection (MIP) and virtual endoscopy. Results: Among 15 lesions, except 1 arterstenosis was missed, other 14 lesions were revealed by 3D CTA including 6 aneurysms,6 arteriovenous malformation(AVM),1 arterial stenosis and 1 CCF. Conclusion: As a non-invasive angiographic technique, with multiple 3D post-processing reconstruction technique, 3D spiral CTA can clearly demonstrate the shape of lesions, and the spatial relationship between lesions and the cerebral blood vessels. Therefore, CTA is of great value in the diagnosis of cerebral vascular diseases.