动态增强容积内插序列在肝脏占位性病变的临床应用价值

目的:评价MRI三维动态增强容积内插序列在肝脏局灶性病变的临床应用价值.方法:91例肝脏占位性病变患者进行常规MR T1WI和T2WI扫描后,采用三维扰相梯度序列行屏气全肝3期动态增强扫描并进行图像重组,观察病灶的增强特点,并对肝动脉的显示程度进行分级.结果:91例中原发性肝癌17例,肝血管瘤24例,肝转移性肿瘤16例,局灶性结节增生2例,肝脓肿11例,肝囊肿21例.肝动脉显示为2级86例94.5%,1级3例3.3%,0级2例2.2%.结论:MR 动态增强容积内插技术可以获得高质量的图像(尤其是动脉期),有利于肝脏局灶性病变的定性、定位诊断和指导临床治疗.

Contrast-enhanced Volumetric Interpolated Breathhold Dynamic MRI in the Diagnosis of Hepatic Focal Lesions

Objective:To evaluate the contrast enhanced 3D-volumetric interpolated breathhold (3D VIBE) MR imaging in the diagnosis of focal space occupying lesions of liver.Methods:Conventional 2D SE T2WI,GRE T1WI,3D VIBE multiphases (plain,artery,portal and equilibrium phase),2D GRE delayed T1WI MRI sequences were performed for all 91 patients with focal lesions of liver.Reformation of vascular images were obtained to observe the enhancing characteristics of focal lesions of liver and the degree of artery enhancement was graded.The conspicuity of hepatic artery for arterial phase in volumetric interpolated breathhold sequence was evaluated with a scale of 0~2,including no artery is identified (grade 0);artery showed mild enhancement (grade 1);conspicuous arterial enhancement (grade 2).Results:Of the 91 patients,there were primary hepatocellular carcinoma (17 cases),hemangioma of liver (24 cases),liver metastases (16 cases),focal nodular hyperplasia (2 cases),liver abscess (11 cases) and hepatic cyst (21 cases).The conspicuity of the hepatic arteries on arterial phase with 3D-VIBE was excellent (score=2) in 86 patients (94.5%),non-satisfied (score=0,1) in five patients (5.5%).Conclusion:3D VIBE MR imaging was useful in the diagnosis of focal lesions of liver.