新鲜血液成像技术对下肢动脉成像及其应用价值  

Peripheral MR Angiography without Contrast Agent using Fresh Blood Imaging(FBI) with ECG-trigger: Initial Experience

作　　者：夏春潮[1] 李真林[1] 陈宪[1] 孙家瑜[1] 李昌宪[1] 唐鹤菡[1] 袁元[1] 宋彬[1] 

机构地区：[1]四川大学华西医院放射科,成都610041

出　　处：《四川大学学报（医学版）》2012年第4期605-608,共4页Journal of Sichuan University(Medical Sciences)

摘　　要：目的探讨新鲜血液成像(fresh blood imagine,FBI)技术无需对比剂结合心电门控技术对下肢动脉血管成像的可行性及其临床应用价值。方法使用1.5T磁共振成像仪(TOSHIBA EXCELART Vantage)对36例怀疑下肢病变的患者分别进行FBI和对比增强磁共振血管成像(CEMRA)下肢动脉血管成像,进行最大密度投影(MIP)重建。由两位有丰富经验的医生单独评价两组图像的整体图像质量、动脉解剖显示、静脉污染、运动伪影的情况,并对结果进行统计学分析。结果所有患者都成功完成了FBI和CEMRA动脉血管成像,显示了所有动脉节段,显示率均为100%。FBI组和CEMRA组的信噪比(SNR)分别为108.39±9.76和87.46±14.77(t=-6.782,P=0.001)。FBI的整体图像质量、解剖显示、静脉污染与CEMRA差异无统计学意义(χ2=0.004,P=0.947;χ2=0.000,P=1.000;χ2=0.681,P=0.409),CEMRA的运动伪影影响较FBI轻(χ2=8.744,P=0.03)。结论 FBI技术进行下肢动脉血管成像,无需用对比剂即能得到较高SNR的下肢血管图像,为临床提供一种新的影像学检查方法。Objective To examine the efficacy of fresh blood imaging（FBI） in detecting vascular diseases in lower extremity.Methods Thirty-six patients suspected of having lower extremity vascular diseases were imaged with a 1.5-T MRI system（Toshiba Excelart Vantage）.Contrast-enhanced MRA（CEMRA） and FBI technology,with maximum intensity projection（MIP） reconstruction were adopted to visualize lower extremity vascular.Signal to noise ratios（SNR） were measured on the FBI and CEMRA images.Two experienced radiologists assessed the imaging quality of peripheral artery MRA on MIP reconstructed images.Results All patients successfully underwent both FBI and CEMRA.All arterial segments were obtained in the 36 patients.The SNR values on FBI and CEMRA were 108.39±9.76 and 87.46±14.77（t=-6.782,P=0.001）,respectively.There were no significant differences in the overall image quality,arterial anatomy and venous overlap（χ2=0.004,P=0.947;χ2=0.000,P=1;χ2=0.681,P=0.409）.The CEMRA motion artifacts were less than FBI（χ2=8.744,P=0.03）.Conclusion The FBI technique,which shows the vascular disease in lower extremity without contrast medium with ECG gating,is considered clinically useful.

关 键 词：新鲜血液成像技术 磁共振血管成像 下肢血管 

分 类 号：R445.2[医药卫生—影像医学与核医学] R543[医药卫生—诊断学]