双源CT在头颈部血管造影中的应用

Application of Dual-source CT in Head and Neck Angiography

目的:探讨双源CT(DSCT)在头颈部血管造影中的临床应用价值。方法:搜集126例疑为头颈部血管病变的患者,行双源CT头颈部血管造影,应用MIP、VR及双能量(DE)去骨等后处理技术进行重建。其中32例经DSA或手术证实。结果:126例均获得高质量图像,除11例阴性及15例正常变异之外,发现血管异常100例(动脉狭窄71例,动脉闭塞17例,动脉瘤9例,Sturge-Weber综合症2例,左颈内动脉缺如、发育性静脉异常、大动脉炎及Moyamoya病各1例)。检查结果与DSA基本一致。所有病例均可清晰显示脑血管主干及其Ⅰ～Ⅱ级分支,其中119例可显示大脑中动脉Ⅳ～Ⅴ级分支。结论:DSCT头颈部血管造影作为无创性检查技术,对于头颈部血管病变的诊断具有较高的临床价值。

Objective：To explore the clinical application of dual-source CT （DSCT） angiography in head and neck. Methods：One hundred and twenty-six cases suspected with cervical/cerebral vascular disease undertook dual-source CT scanning. The raw data of all cases were post-processed and reconstructed with maximal intensity projection （MIP）, volume rendering （VR） techniques and dual energy （DE） bone removal reconstruction. Thirty-two cases had digital subtraction an giography （DSA） or surgery. Results： High quality images were acquired in all of the 326 cases apart from 11 cases with no abnormalities and 15 cases showed normal variants of blood vessels, abnormalities of blood vessels were detected in 100 pa tients,including arterial stenosis in 71 patients,arterial occlusion in 17 patients, aneurysm in 9 patients, Sturge-Weber syndrome in 2 patients and absence of left internal carotid artery,Moyamoya disease,developmental venous anomalies （DVAs） and arteritis for 1 patient each. The findings were basically in accordance with that of DSA. The major trunk and 1st to 2nd grade branches of cerebral arteries were clearly demonstrated in all cases, the 4th- 5th grade branches of middle cerebral arteries were showed in 119 cases. Conclusion：Dual-source CT angiography is a state-of-the-art non-invasive diagnostic modality for the vascular diseases of head and neck,which has a rather significant value for clinical application.