【摘要】 目的　计算肝细胞癌、肝转移瘤、肝脏海绵状血管瘤和肝囊肿的病灶 /肝脏磁共振信号强度比 (SIR) ,并评价其与病灶性质的关系。方法　随机选择经确诊的肝细胞癌、肝转移瘤、肝海绵状血管瘤和肝囊肿病例共 92例 ( 148个病灶 )行前瞻性磁共振成像 ( 0 .5T)研究。计算 4种病灶的SIR ,并进行统计学分析。结果　在T1W图像上 ,肝海绵状血管瘤与恶性肿瘤的SIR值间差异无显著性 (t=1.799,P =0 .0 75) ;质子加权像上 ,良恶性肿瘤的SIR之间无统计学意义 (t=0 .691,P =0 .4 91) ;T2 WI上 ,良性病变的SIR显著高于恶性肿瘤 (P <0 .0 1) ,且 4种病变的SIR值与回波时间 (TE)之间均存在线性正向相关关系。结论　在T2 WI上测得的SIR可用于区分肝脏占位性病灶的性质更多还原

【Abstract】 Objective To determine the value of lesion/liver signal intensity ratio (SIR) in characterizing the small focal hepatic lesions.Method Ninety two patients with 148 focal hepatic lesions were prospectively performed magnetic resonance imaging at 0.5T.Calculated lesion/liver signal intensity ratios (SIR) of hepatocellular carcinomas,metastases,hemangiomas and cysts.Result There was no significant difference between the values of SIR for hemangiomas and those for malignant lesions at T 1 weighted imaging(t=1.799,P=0.075),and there was no significant difference between the benign lesions and malignant lesions at proton density imaging(t=0.691,P=0.491).The values of the signal intensity ratios at T 2 weighted imaging for benign lesions were significantly higher than those for malignant lesions(P<0.01),linear positive correlation was found between the SIR values of the four typies liver lesions and echo time (TE).Conclusion In T 2 weighted imaging,the values of SIR can be used to characterize hepatic lesions.更多还原