【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 /脾脏信号强度比 (SIR) ,研究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、肝血管瘤和肝囊肿病例共 77例 (10 8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　于T1WI上 ,肝囊肿的SIR值显著低于肝细胞癌、肝转移瘤和肝血管瘤的SIR值 (t =14 .42 5 ,Ρ <0 .0 0 1) ,以 0 .76为界 ,诊断正确率为 94%。T2 WI上 ,血管瘤的SIR值均显著高于恶性肿瘤 (Ρ <0 .0 5 ) ,TE =60ms、90ms、12 0ms时 ,分别以 1.2、1.5、1.4为界 ,区分血管瘤与HCC ,诊断正确率分别为 98%、89%、98%。结论　病灶 /脾脏信号强度比在肝脏占位病变定性诊断方面有肯定的价值更多还原

【Abstract】 Objective To determine the value of lesion/spleen signal intensity ratio(SIR) in characterizing the small focal hepatic lesions.Methods Seventy-seven patients with 108 focal hepatic lesions were prospectively perfromed magnetic resonance imaging at 0.5T.Calculated lesion/spleen signal intensity ratios(SIR) of hepatocellular carcinomas,metastases,hemangiomas and cysts.Results The values of the signal intensity ratios for cysts were significantly lower than those for the other three lesions at T 1-weighted imaging(t=14.425,Ρ<0.001).A cutoff of 0.76 was 94% accurate.At T 2-weighted imaging(TR=2500 ms)the values of the signal intensity ratios for hemangiomas were significantly higher than those for malignant lesions(Ρ<0.05).The cutoff of 1.2?1.5?1.4 were 98%?89%?98% accurate to distinguish hemangiomas from hepatocellular carcinomas at 60 ms?90 ms?120 ms TE respectively.Conclusion Lesion/spleen signal intensity ratio has the postive value for characterizing hepatic lesions.更多还原