【摘要】 目的探讨增强ＭＲ血管造影的方法，评价快速梯度回波序列增强ＭＲ数字减影血管造影对腹主动脉、髂动脉及下肢动脉病变的诊断价值。方法３６例临床疑有腹主动脉、髂动脉或下肢动脉疾病的病人进行增强３Ｄ快速梯度回波扫描（重复时间１２或２０毫秒、回波时间４或５毫秒、反转角６０°）。对比剂用量０．２ｍｍｏｌ／ｋｇ。原始图像先进行减影处理，再进行最大信号强度投影（ＭＩＰ）重建。结果所有３６例患者（包括６例正常）均满意地显示了感兴趣区的血管。其中，腹主动脉夹层动脉瘤４例，肾动脉狭窄２例，人工血管移植术３例，腹主动脉瘤２例，髂动静脉瘘１例，髂动脉及下肢动脉狭窄１８例。结论三维磁共振数字减影血管造影是腹部及外周血管成像可靠的、充满活力的方法。更多还原

【Abstract】 Objective To study the method of 3D contrast enhanced MR digital subtraction angiography(MR DSA) and evaluate the diagnostic value in patients with abdominal aortic, iliac and lower extremity artery diseases. Methods 36 cases suspected of abdominal aortic, iliac and lower extremity artery diseases underwent dynamic 3D T 1 FFE(fast field echo)sequence (repetition time 12 or 20 ms, echo time 4 or 5 ms, flip angle 60°) after intravenous injection of Gd DTPA (0.2mmol/kg body weight). The source images were subtraction from mask images followed by maximum intensity projection(MIP)reconstruction. Results In 36 patients, all diseased arteries were well demonstrated including 6 normal cases. Among them, abdominal aortic dissection 4, abdominal aortic aneurysms 2, failing vascular grafts 3, iliac and lower extremity artery stenosis 18, renal artery stenosis 2 and iliac arteriovenous fistula 1. Conclusion 3D MR DSA is a reliable and robust technique for fast abdominal and peripheral vascular imaging.更多还原