磁敏感成像技术在肝脏局灶性病变的初步应用

目的：探讨磁敏感加权成像（SWI）在肝脏局灶性病变内部结构的显示能力及其鉴别诊断中的应用价值。方法：搜集18例经临床及影像证实肝脏病变包括血管畸形、肝细胞癌、转移瘤、血管瘤以及肝囊肿患者共25个肝局灶性病变行常规T1WI、T2WI及SWI扫描，并将其SWI图像与常规MRI序列进行比较。18例均同时行增强扫描，1例动静脉畸形同时行MRA检查，1例血管瘤动态增强后再次行SWI检查。结果：1例血管畸形SWI能较常规平扫、增强及3D MRA更清楚显示其异常静脉血管形态；4例肝细胞癌、3例胆管细胞癌及2例转移瘤，SWI均能显示病灶内瘤静脉及血液降解产物；5例肝血管瘤及3例肝囊肿，SWI均显示病灶呈均匀稍高信号，病灶较大者邻近静脉受压。结论：SWI在显示肝脏静脉性血管畸形、肿瘤相关静脉结构等方面优于常规MR序列，对肝脏局灶性病变有一定鉴别诊断价值，是研究肝脏局灶性病变内部结构的一种新的方法。

Clinic application of susceptibility weighted imaging in the discovery and diagnosis of focal liver lesions

Objective: To investigate the value of susceptibility weighted imaging in the discovery and diagnosis of focal liver lesions.Methods: Eighteen patients with 25 focal liver lesions were collected,all of them were proved by clinic and imaging.It included liver vascular malformation(n=1),hepatocellular carcinoma(n=4),cholangiocellular carcinoma(n=3),metastatic tumor in liver(n=2),liver haemangioma(n=5),and liver cyst(n=3).MR imaging were performed with conventional T1WI,T2WI,SWI and dynamic Gd-DTPA contrast en...