多层CT后处理图像对主动脉缩窄的诊断价值

Clinical value of postprocessing images of multi-slice spiral CT in the diagnosis of aortic coarctation

目的探讨多层螺旋CT(MSCT)后处理图像对主动脉缩窄的诊断价值。方法对9例临床怀疑为主动脉缩窄的患者进行主动脉增强扫描。对所有扫描图像行冠、矢状面多平面重组(MPR)及容积再现(VR)、最大密度投影(MIP)、表面阴影成像(SSD)、薄层VR重组。结果9例患者经行主动脉CT成像检查,均确诊为主动脉缩窄,其中有2例合并动脉导管未闭。结果与手术及DSA检查结果相一致。主动脉靶重建全面整体显示9例患者缩窄情况,整体VR全面整体显示9例患者侧支循环情况。结论MSCT二维与三维图像相结合对主动脉缩窄诊断和治疗方案的制定以及术后随访是1种非常有用的无创的检查方法。

Objective To explore the clinical value of postprocessing images of multi-slice spiral CT （MSCT） in the diagnosis of aortic coarctation. Methods Enhanced MSCT scan of the aorta was performed in 9 patients with suspected aortic coarctation. Two-dimensional and three-dimensional reformation were performed in all cases by means of MPR （coronal, sgittal oblique）, MIP, SSD, VR, and clipped VR, respectively. Results 9 cases were diagnosed as aortic coarctation by MSCT enhanced scan. 2 cases had patent ductus. The results accorded with surgical and DSA findings. Three-dimensional reformation of aorta could show the stenosis in all cases, and VR images of the whole chest could show the collateral circulatory pathways in all cases. Conclusion Two-dimensional and three-dimensional MSCT angiography is a useful and noninvasive mean to identify aortic coarctation. MSCT is also useful for planning the therapeutic method and postoperative follow-up examinations.