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目的探讨多层螺旋CT(MSCT)静脉血管造影技术对颈椎静脉丛成像的可行性,为颅底及颈椎区域手术前静脉丛的评估提供依据。方法搜集152例行颈部CTA检查、无静脉性疾病患者的静脉期原始数据,在AW4.3工作站上分别采用最大密度投影(MIP)及容积再现(VR)两种后处理方式进行颈椎静脉丛的重组,对颈椎内、外静脉丛的分布及走行以及与周围结构的空间位置关系进行观察,然后参照动脉评价方法由3名主管技师对两种图像上对椎静脉丛的显示能力分别进行评价,并进行χ2检验。结果 MIP、VR图像上都能够很好地显示颈椎内、外静脉丛的分布及走行,以及与周围结构的空间位置关系,MIP显示Ⅰ级颈椎静脉丛121例,Ⅱ级28例,Ⅲ级3例;VR显示Ⅰ级118例,Ⅱ级31例,Ⅲ级3例;两种后处理方式对颈椎静脉丛的显示能力无明显差异(χ2=0.02,P﹥0.05)。结论 CTV能清晰显示颈椎静脉丛,对颈椎术前静脉丛的评估、研究颈椎静脉丛的临床意义等具有重要的价值。
Objective To investigate the feasibility of multi-slice spiral CT (MSCT) venography for cervical venous plexus imaging and to provide evidence for the evaluation of preoperative venous plexus in skull base and cervical region. Methods We collected 152 patients with cervical venous CTA during the venous phase without venous disease. We collected the venous plexus of the cervical spine by using the maximum density projection (MIP) and volume rendering (VR) on the AW4.3 workstation. Of the cervical spine, the distribution of outer and outer venous plexus and its spatial relationship with the surrounding structure was observed, and then with reference to the method of arterial evaluation by the three competent technicians on the two images on the performance of the vertebral venous plexus were evaluated , And χ2 test. Results Both MIP and VR images showed the distribution and movement of the internal and external cervical plexuses and their spatial relationship with the surrounding structures. MIP showed 121 cases of grade Ⅰ cervical spine plexus, 28 cases of grade Ⅱ, Ⅲ grade 3 In VR, 118 cases were grade Ⅰ, 31 cases were grade Ⅱ and 3 cases were grade Ⅲ. There was no significant difference in the display ability of cervical spine plexus between the two treatments (χ2 = 0.02, P> 0.05). Conclusion CTV can clearly show the cervical venous plexus, the evaluation of cervical preoperative venous plexus, the clinical significance of cervical spine plexus is of great value.