磁共振TRICKS技术在下肢血管成像的临床应用价值

Clinical Application of MR TRICKS Technique in the Lower Extremity Angiography

目的:探讨3.0T磁共振的时间分辨对比剂动态显像技术(TRICKS)在下肢血管成像中的应用价值。方法:对21例下肢血管疾病患者(肿瘤病变10例,血管性病变11例)行常规MRI平扫,注入对比剂后应用TRICKS技术行动态血管造影,最后行常规增强扫描,分析全部病例的图像质量和病变显示情况并与手术病理或DSA对照。结果:所有病例均顺利完成TRICKS检查,TRICKS图像动态显示了动静脉的充盈情况和动脉结构,肿瘤性病变可以清晰显示肿瘤的供血血管,血管性病变可以直观显示出畸形或迂曲的血管,所有诊断与DSA和病理诊断相符。结论:TRICKS技术是一种新的、有效的腹部至下肢血管成像方法,能够在不影响常规增强扫描的情况下动态观察血管情况,对下肢血管病变的诊断具有重要价值。

Objective：To investigate the clinical value of TRICKS technique with 3.0T MR scanner in the lower extremity angiography. Methods：Twenty-one patients with vascular diseases of lower extremity including tumors （n=10） and vascular diseases （n= 11） were evaluated with MRI,including routine plain MRI and dynamic angiography with TRICKS technique after contrast administration,then,routine contrast enhanced MRI was performed by using a 3.0T MR scanner. The image quality of all patients and the ability of illustrating vascular lesions were analyzed and correlated with surgery, pathology or digital subtraction angiography （DSA）. Results： All of the 21 patients had TRICKS successfully accomplished. Filling status and structures of arteries and veins could be showed dynamically as well as the feeding arteries could be clearly displayed by TRICKS techniques. The deformed and tortuous blood vessels of vascular lesions could also be assessed. The diagnosis of vascular disease acquired by TRICKS were in accordance with that of pathology or DSA. Conclusion： TRICKS is a new and effective technique of MR angiography for abdomen and lower extremity, blood vessels could be dynamically demonstrated without any influence of routine contrast enhance scanning, which is significant in the diagnosis of vascular diseases of lower extremities.