DWI结合LAVA技术在肝脏占位性病变中的应用价值

目的：探讨联合运用DWI和LAVA技术在肝脏占位性病变的诊断价值。方法：回顾性分析经手术病理证实的60例肝脏占位性病变（小肝癌30例、肝血管瘤15例、肝囊肿15例）的MRI图像。扫描序列为常规自旋回波序列（T2WI、T1WI）、LAVA多期增强序列及DWI检查（b值分别为0和800 s/mm^2）。比较小肝癌、肝血管瘤、肝囊肿的ADC值是否有差异;对比分析LAVA多期增强序列（A组）、T1WI、T2WI和DWI（B组）及这2种方法联合应用（C组）在病变检出和定性诊断方面的价值。结果：在病变检出方面：A组检出67个病灶,B组检出67个,C组检出67个,A组与C组比较,对病变的检出率无差异。在结节的定性诊断方面：在取得临床或病理证实的67个病灶中,A组诊断正确57个（85.1%）,C组为65个（97%）,2组间差异有显著性意义（χ2=5.858,P〈0.05）;肝囊肿、肝血管瘤、小肝细胞癌的ADC值分别为（3.341±0.299）×10-3mm^2/s、（2.154±0.308）×10-3mm^2/s、（1.132±0.241）×10-3mm^2/s。结论：DWI结合LAVA技术对肝脏小病灶的定性诊断具有重要的临床应用价值。

Diagnostic value of combined DWI and LAVA for hepatic focal masses

Objective:To explore the value of combined LAVA and DWI in the diagnosis of hepatic focal masses.Methods:MRI images of 60 patients pathologically confirmed to have hepatic focal masses(hepatocellular carcinoma 30,liver hemangioma 15,liver cyst 15) were retrospectively analyzed.MRI sequences included T1WI,FS T2WI,enhanced multi-phasic LAVA scanning and DWI(b value as 0 and 800s/mm2 respectively).Images quality of all sequences was assessed.ADC values of the small hepatocellular carcinoma,liver hemangioma and...