成人盆腔血管多层螺旋CT三维重建初步研究

目的：探讨多层螺旋CT应用于正常人体盆腔血管形态学研究的可行性，重建盆腔血管，观察正常人体盆腔血管一般形态。方法：经肘正中静脉为16名正常受试者注射造影剂后，使用16排多层螺旋CT进行盆腔扫描，图像采集后经遮盖容积重建（SVR）和最大密度投影（MIP）技术重建盆腔动、静脉，鉴别显影血管及各血管分（属）支。结果：全部受试者中均显示出3-4级血管，平均显影时间为30s时可以清晰的显示动脉系统，90～130s之间为二者共同显示，并且在130s时静脉系统显影最为清晰，而230s后由于组织强化作用显著增强，静脉边缘显示不够清晰，但是相对独立。结论：多层螺旋CT可以作为解剖学手段，应用于正常人体盆腔血管形态学研究，并且随软件的升级可以更加清晰、准确地分离动静脉，对于今后临床盆腔血管疾病研究具有重要意义。

Three dimensional reconstruction of adult pelvic blood vessel by multi-slice spiral CT

Objective: To explore the feasibility of reconstructing the adult pelvic arteriovenous system by the use of multi-slice spiral CT(MSCT) and study the morphology of human pelvic blood vessels, and find out the general distribution of the above vessels. Methods: After contrast administration through median cubital vein at an injection of 3.5ml/s, sixteen adults underwent contrast-enhanced CT angiography of pelvic utilizing a 16-row multi-slice spiral CT. Images were collected and dealt with the technique of shaded volume reconstruction (SVR) and maximum intensity projection (MIP), and were reconstructed into 3D-graph in order to screen arteries and veins and their branches or tributaries. Results: All subjects showed the 3rd and 4th level vessels, and arteries showed clearly at the average visualization time of 30 s. Both arteries and veins were showed during the 90-130s, and the veins showed clearly at 130s. For the contrast entering in soft tissue, veins showed with a vague margin but relatively independent after 230s. Conclusions: Multi-slice spiral CT will be a useful method to perform the anatomic structures of pelvic blood vessel. With the upgrade of software, it will be possible to distinguish arteries and veins of pelvic cavity more clearly and exactly. This method is significant for treating pelvic blood vessel disease in future.