成像__

3DCTA成像技术在脑动脉瘤诊断中的应用价值

http://www.100md.com 《新疆医科大学学报》 2005年第6期

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(3DCTA)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3DCTA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(3DDSA)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，3DCTA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: 3DCTA 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 3DCTA imaging techniques in the diagnosis of intracranial aneurysms

    CHENG Xiaoyan， LIU Wenya， 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 3DCTA, 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 3DDSA 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: 3DCTA techniques such as VR、MIP and VE have their own predominant role and could complement each other. ......

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