心电触发非对比增强磁共振下肢静脉成像可行性研究

Feasibility study of ECG-triggered non-contrast.enhanced magnetic resonance venography of lower extremities

应用1．5T磁共振对12名健康志愿者下肢静脉行心电触发非对比增强磁共振成像（NCE-MRV），根据下肢静脉17段分段标准对图像质量进行定量和定性评价。均成功完成检查，下肢静脉系统的平均信噪比、对比噪声比分别为66±23和53±22；图像质量优、良率分别为62％和31％；未出现不可诊断血管节段。因此下肢NCE—MRV切实可行，可获得良好的图像质量。

Twelve healthy volunteers underwent ECG-triggered non-contrast-enhanced magnetic resonance venography（NCE-MRV） of lower extremities on a 1.5T MR scanner. Image quality was assessed quantitatively and qualitatively with a 17-segment model. ECG-triggered （NCE-MRV） was successfully performed in all patients. Mean signal to noise ratio and contrast to noise ratio of lower extremities were 66 ± 23 and 53 ± 22 respectively. Excellent and good image qualities were achieved in 62% and 31% of all segments respectively without non-evaluable segment. Thus ECG-triggered NCE-MRV of lower extremities is feasible with reliable image quality.