3DCTA成像技术在脑动脉瘤诊断中的应用价值
成像,,脑动脉瘤;三维CT血管造影术;数字减影血管造影,1资料与方法,2结果,3讨论,参考文献:
摘要:目的: 探讨三维CT血管造影术(3DCTA)的各种成像技术,包括多层平面重建(MPR)、最大密度投影(MIP)、表面遮盖显示(SSD)、容积再现(VR)、仿真内窥镜技术(VE)在脑动脉瘤诊断中的应用价值。方法:对临床怀疑脑动脉瘤的103例患者进行CT检查,然后采用3DCTA的5种成像技术分别进行成像。结果: (1)三维数字减影血管造影(3DDSA)与手术所见,95例患者共检出109个动脉瘤,8例未发现动脉瘤,3DCTA共检出106个动脉瘤,漏检2例共3个动脉瘤。(2)SSD、MIP及VR 3种成像技术对小动脉瘤的检出率分别为52.8%、72.0%、91.7%,呈逐渐升高趋势,其检出率差异有统计学意义(χ2=13.569, P<0.05)。(3)原始图像、MPR、SSD、MIP、VR检出脑动脉瘤的灵敏度分别为52.3%、56.9%、84.4%、90.8%、97.2%,以VR技术最优,其次是MIP技术。(4)原始图像、MPR、MIP、VE检出脑动脉瘤钙化的灵敏度分别为64.7%、76.5%、82.4%、88.2%,以VE技术最优,其次是MIP技术。(4)MIP技术清晰地显示了脑动脉瘤的自身形态和周边的关系。结论: 3DCTA 的MIP、VE及VR技术各有其优势并可相互补充。关键词: 脑动脉瘤;三维CT血管造影术;数字减影血管造影
Evaluation of the 3DCTA imaging techniques in the diagnosis of intracranial aneurysms
CHENG Xiaoyan, LIU Wenya, XING Yan
(Department of Image Center,First Affiliated Hospital, Xinjiang Medical University, Urumqi 830054,China)
Abstract:Objective: To evaluate the clinical value of five imaging techniques of 3DCTA, including multiplanar reformation(MPR),maximum intensity projection(MIP),shaded surface display(SSD), volume rendering(VR) and vitual endoscopy(VE) in the diagnosis of intracranial aneurysms. Methods: 103 cases who were suspected to be intracranial aneurysms were scanned by CT and then processed by the above five imaging techniques. Results: (1) Results of operation and 3DDSA showed that 95 patients were identified with 109 intracranial aneurysms. The other 8 patients were not detected any aneurysms. 93 patients were identified with 106 aneurysms by CTA, and 3 aneurysms in 2 patients were leaked out by CTA;(2)VR was found superior to SSD and MIP in the detection of small intracranial aneurysms.The detection rate had significantly difference among the three methods(χ2=13.569, P<0.005); (3) The sensitivity of detecting aneurysms in original image, MPR, SSD, MIP and VR was 52.3%, 56.9%, 84.4%, 90.8% and 97.2% respectively; (4) The sensitivity of detecting calcified aneurysms in Original image, MPR, MIP and VE was 64.7%, 76.5%, 82.4% and 88.2% respectively; (5) Application of MIP could display the morphological characteristics of aneurysm and its relationship with adjacent tissue clearly. Conclusion: 3DCTA techniques such as VR、MIP and VE have their own predominant role and could complement each other. ......
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