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目的探讨MR I透视触发造影剂团跟踪和动态增强磁共振血管成像(DCE-MRA)扫描技术在肺灌注和肺动脉血管造影中的应用价值。方法8例疑有肺栓塞的患者,应用MR I透视触发造影剂团跟踪和DCE-MRA扫描技术,行肺动脉血管造影和肺灌注成像。结果8例均成功进行肺动脉血管造影和肺灌注扫描,其中2例正常,6例发现肺动脉血栓形成,并有明确动态显示的局部肺叶灌注异常。结论MR I透视触发造影剂团跟踪和DCE-MRA扫描技术的应用,可1次注射造影剂既发现了肺动脉内血栓,又可显示肺内灌注缺损,是较好的肺栓塞诊断方法。
Objective To explore the value of MR I fluoroscopy-guided contrast agent bolus tracking and dynamic contrast-enhanced magnetic resonance angiography (DCE-MRA) in lung perfusion and pulmonary angiography. Methods Eight patients with suspected pulmonary embolism were enrolled in this study. The MR I fluoroscopy was used to detect the contrast group and DCE-MRA scan. Pulmonary arteriography and pulmonary perfusion imaging were performed. Results All the 8 cases were successfully performed pulmonary angiography and lung perfusion scan, 2 cases were normal, 6 cases were found pulmonary thrombosis, and there is a clear dynamic display of regional lobar perfusion abnormalities. Conclusion The application of MR I fluoroscopy to track the contrast agent bolus and DCE-MRA scan can detect pulmonary thrombus and perfusion defect in one injection of contrast agent, which is a good diagnostic method for pulmonary embolism.