3D-CEMRA对肺动脉栓塞的诊断价值

材料写作网    时间: 2021-09-06 04:07:15     阅读:次

【中图分类号】R445.2【文献标识码】A【文章编号】1005-2720-(2010)04-0007-02【摘要】目的:探讨三维动态增强磁共振血管造影(3d contrast-enhancement magnetic resonance angiography, 3DCEMRA)在肺动脉栓塞中的诊断价值。方法:对15例临床怀疑的肺动脉栓塞患者行3DCEMRA。先行MR平扫,然后应用屏气快速梯度回波(FLASH)序列进行3D CE MRA。增强前例行一次动态扫描,作为减影用的蒙片。快速静脉注射对比剂Gd-DTPA ,扫描应用carebolus行动态扫描,以MIP(最大密度投影法)、MPR(多平面重建法)行二、三维重建。结果:被确诊为肺栓塞的12例患者,共发现栓塞31处,其中3例伴有肺动脉高压。肺栓塞的3D CEMRA的直接征象为肺动脉内充盈缺损(中心型、部分型、附壁型)和肺动脉截断(杵状、平直、锥形及鼠尾状截断);间接征象为栓塞所属肺野出现梗死灶,近心侧肺动脉增粗等肺动脉高压征象及少量胸腔积液。结论:3D CEMRA对中心、叶和段的肺动脉栓塞的诊断价值较大,3D CEMRA检查无创、无电离辐射损害、造影剂过敏率极低,可反复进行复查对照而较准确判断溶栓疗效。

【关键词】肺栓塞;磁共振成像;血管造影术

3D CEMRA to pulmonary artery embolism"s diagnosis value

Shi Baichun

【Abstract】Objective:Objective Explore the three-dimensional dynamic contrast-enhanced magnetic resonance angiography (3d contrast-enhancement magnetic resonance angiography, 3D CEMRA) in the diagnosis of pulmonary embolism. Methods:In 15 patients with suspected pulmonary embolism underwent 3D CEMRA. First MR scan, and then breath-hold fast-gradient echo (FLASH) sequences of 3D CE MRA. Enhanced dynamic scan before the regular time, as a subtraction mask used. Rapid intravenous injection of contrast agent Gd-DTPA, scanning applications care bolus dynamic scan lines in order to MIP (maximum intensity projection), MPR (multi-planar reconstruction method) line 2, three-dimensional reconstruction.Results: Was diagnosed with pulmonary embolism in 12 patients, 31 were found to embolism, of which three cases associated with pulmonary hypertension. Pulmo...

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