论文部分内容阅读
目的探讨64排螺旋CT血管减影成像技术显示头颈部血管的价值及优势。方法对56例患者进行头颈部64排CT血管减影成像检查。先行小剂量对比剂测试颈动脉时间-密度曲线,设定最佳延迟时间,要求第一序列平扫时间与第二序列增强扫描延迟时间之和是0.4的整倍数。平扫后参数不变行增强扫描,将增强前后数字化图像进行减影,去除骨结构,从减影图像中进行血管三维重建。结果56例中49例CT血管减影成像均能良好显示颈内动脉、椎动脉及其主要分支,无骨质干扰,余7例因头部轻微运动,颅底及颈椎骨质未能完全减去。21例蛛网膜下腔出血中,显示颅内动脉瘤及动静脉畸形15例,其中11例经数字减影血管成像检查证实。25例缺血性卒中和短暂性脑缺血发作中,显示动脉狭窄18例。结论使用64排CT血管减影成像技术,去除骨结构对血管的影响,提供高清晰的血管图像,对于诊断脑血管病变具有很好的临床应用价值。
Objective To investigate the value and advantage of 64-slice spiral CT angiography in the visualization of the head and neck blood vessels. Methods Sixty-six patients underwent head-and-neck 64-slice CT angiography. First small doses of contrast agent test carotid artery time-density curve, setting the optimal delay time, requiring the first sequence scan time and the second sequence enhanced scanning delay time is an integral multiple of 0.4. After the scan, the parameters were unchanged, and the contrast enhancement scan was performed. The digitized images were enhanced and subtracted, the bone structure was removed, and the three-dimensional reconstruction of the blood vessels was performed from the subtracted images. Results In all 56 cases, 49 cases of CT angiography showed the internal carotid artery, vertebral artery and its major branches without bone interference. The other 7 cases had slight head movement and the skull base and cervical vertebra were not completely reduced go with. In 21 cases of subarachnoid hemorrhage, 15 cases showed intracranial aneurysms and arteriovenous malformations, of which 11 cases were confirmed by digital subtraction angiography. 25 cases of ischemic stroke and transient ischemic attack, showing arterial stenosis in 18 cases. Conclusion Using 64-slice CT angiography, removing the influence of bone structure on the blood vessels and providing high-resolution images of blood vessels has a good clinical value for the diagnosis of cerebrovascular diseases.