复杂先心病3D血管成像的临床应用价值初探

Clinical Study of 3D CT angiography in complex congenital heart disease

目的:探讨多层螺旋CT血管成像(CTA)对复杂先心病的临床应用价值。方法:利用多层螺旋CT特定参数先行扫胸部定位像,再行主动脉处平扫胸部一层,确定感兴趣区靶血管,再确定增强扫描范围,然后进行扫描。采用扫描跟踪技术,靶血管的CT值设置为160 HU(阈值),当靶血管内的造影剂剂量达到设置的160 HU值时计算机自动曝光。结果:经静脉团注造影剂后,当靶血管内造影剂达到阈值时对其作连续多层扫描,将扫描数据进行三维图像处理,得到清晰的心脏血管的三维图像。结论:复杂先心病3D CTA的检查是一种安全、方便、图像清晰逼真、价格低廉且患者无痛苦的检查方法。

Objective To evaluate the application of MSCT angiography in complex congenital heart disease.Methods Images of patient with complex congenital heart disease were acquired by MSCT with dedicated parameters. Target vas in ROI was identified with plain scanning and then contrast scanning were followed. The preset CT value of the target vas was 160 Hu. The computer would expose automatically when the contrast agent reached the value. Results The target vas was scanned continuously when the contrast agent reached the preset value after ＂bonus injection＂ of the vain. Then the acquired data were processed into a clear 3D image of cardiac vas. Conclusion 3D CT angiography is a safe, effective and noninvasive imaging modality for complex congenital heart disease.