SSD-CTA与VCTDSA对脑动静脉畸形诊断价值的对照研究

Control study on skull to boneless head CTA by surface shaded display technique and volume computed tomographic digital subtraction angiography in diagnosing AVM

目的探讨表面遮盖重建进行头部CTA去骨成像技术(简称SSD-CTA)对脑动静脉畸形(AVM)的诊断价值。方法收集重庆医科大学附属第一医院提供的27例利用容积CT数字减影血管造影技术(VCTDSA)确诊为AVM的患者资料,将其数据导入本院CT工作站,进行SSD-CTA去骨重建,并将两组数据进行比较。另收集成都市第一人民院5例经SSD-CTA检查确诊为AVM的患者资料,将其结果与DSA进行对比。结果 SSD-CTA重建图像质量不及VCTDSA,但两种技术的诊断结果差异无统计学意义(P>0.05)。受限于本院技术条件,收集AVM患者数量不足以进行统计分析;对图像的观察体会,SSD-CTA细节分辨不及DSA,但所收集病例与DSA诊断一致。结论 SSD-CTA具有临床实用价值,可作为颅内动静脉畸形的检查、诊断方法。

Objective To investigate the diagnostic value of technologies for arteriovenous malformation（AVM）,which are skull to boneless head CTA by surface shaded display technique（hereinafter referred to as the SSD-CTA technology）.MethodsTotally 27 patients of the First Affiliated Hospital of Chongqing Medical University were selected,which were diagnosed with AVM by VCTDSA.The original data to our hospital CT workstation were imported,SSD-CTA technology to bone reconstruction were performed,and the data of the two groups were compared.Another 5patients in our hospital which were diagnosed with AVM by SSD-CTA examination were selected,and compared the results with DSA.Results The quality score of SSD-CTA reconstructed image was less than that of VCTDSA,but the diagnosis of the two technologies for AVM had no significant statistical difference（P〉0.05）.The number of AVM patients from our hospital wsa too less to do the statistical analysis.The detail resolution of SSDCTA was less than DSA,but the diagnosis of SSD-CTA was consistent with DSA.Conclusion SSD-CTA has clinical practical value,can be used as a check,intracranial venous malformation diagnosis.