摘要
目的:探讨流入反转恢复(IFIR)稳态自由进动(FIESTA)结合呼吸激发技术进行肾动脉成像的可行性。方法:采用GE1.5T和3.0TMR机,对疑诊上腹部病变的24例患者采用IFIR-FIESTA序列和基于薄层LAVA技术增强扫描进行肾动脉成像,采用MIP法进行图像重组,对2组肾动脉图像的总体质量、肾静脉伪影及肾动脉分支显示情况,由2位观察者采用5级评分法进行对照分析,并记录2组检出的副肾动脉以及肾动脉狭窄情况。结果:24例患者均成功完成IFIR-FIESTA和LAVA扫描。观察者1评价结果:IFIR-FIESTA组图像质量评分为4.0分、2例(2/24)未达诊断要求者均为腹水患者;LAVA组为3.8分,2组间差异无显著性意义(P>0.05)。观察者2对IFIR-FIESTA组图像质量评分为4.2分(仅1例未达到诊断要求),优于LAVA组(3.7分),2组间差异有显著性意义(P>0.05)。观察者1对IFIR-FIES-TA组图像上肾静脉伪影及肾动脉分支显示情况的评分分别为4.8分和2.5分,显著高于LAVA组的3.4分和1.6分;观察者2对IFIR-FIESTA组这2项的评分分别为4.9分和2.6分,也高于LAVA组的3.5分和1.7分(P<0.05)。结论:使用IFIR-FIESTA技术肾动脉成像无需对比剂且成功率高,在临床上是可行的。
Objective：To investigate the feasibility of Inflow Inversion Recovery （IFIR）-fast imaging employing steady-state acquisition （FIESTA） combined with respiratory triggering technique in MR angiograpby （MRA） of renal artery. Methods：Twenty-four patients with suspected abdominal disease were included in this study. MIP images of kidney arteries were reconstructed based on axial images acquired with IFIR-FIESTA and contrast enhanced MR angiography （CEMRA） from thin-slice LAVA. The image quality, assessment of renal vein artifact and renal artery branches were compared be- tween the two groups. Results were scored as 5 grades and analyzed by 2 observers,accessory renal arteries and stenosis of renal arteries were recorded as well. Results： All the 24 patients bad IFIR-FIESTA and LAVA successfully completed. 22/24 patients got score 4.0 for image quality on IFIR-FIESTA. By observer 1, （the two patients with low quality images were due to ascites）,the score for LAVA group was 3.8,no statistical difference was existed between these 2 groups （P〉0. 05）. The image score of IFIR-FIESTA group was 4.2 by observer 2 （only one patient didn＇t reach the requirement of diagnosis）, which was superior to the LAVA group （score 3.7）, significant statistical difference was existed （P〈0.05）. Scores for renal vein artifact and demonstrating renal artery branches in IFIR-FIESTA images group were 4.8 and 2.5 respectively by observer 1 ,which were significantly higher than that of LAVA group （3.4 and 1. 6 respectively）. As for observer 2, scores for renal vein artifact and renal artery branches in IFIR-FIESTA group were 4. 9 and 2.6 respectively, which also were higher than those in the LAVA group （3.5 and 1.7 respectively） （P〈0.05）. Conclusion： Non contrast enhanced magnetic resonance angiography of renal artery with IFIR FIESTA technique is feasible in clinical routine practice.
出处
《放射学实践》
北大核心
2009年第11期1265-1269,共5页
Radiologic Practice
关键词
肾动脉
对比剂
磁共振血管成像
Renal artery
Contrast material
Magnetic resonance angiography
