摘要目的 探讨声触诊组织量化(virtual touch tissue quantification,VTQ)技术检测肝硬度的可行性,建立成年人正常肝剪切波速度参考值范围.方法 应用VTQ技术,对161例健康体检者肝内4个部位进行VTQ检测,获得肝剪切波速度正常值.前10例志愿者分别接受两名经过VTQ技术培训的超声主治医师进行肝内相同部位VTQ的检测.结果 ①161例成年人肝剪切波速度95％可信区间(confidence interval,CI)为1.089～1.105 m/s,肝内各受检部位剪切波速度差异无统计学意义(P＞0.05),肝内4个部位剪切波速度组内相关系数0.80(95％ CI:0.75-0.85)；②不同年龄组肝剪切波速度差异无统计学意义(P＞0.05),而不同性别组肝剪切波速度差异有统计学意义(P=0.001)；③不同操作者对同一组研究对象进行肝VTQ检测的测值差异无统计学意义(P=0.82).结论 成年人正常肝剪切波速度参考值范围为1.089～1.105 m/s;VTQ技术重复性及稳定性好,应用该技术进行肝硬度检测无创易行.

abstractsObjective To explore the feasibility of detecting liver stiffness by virtual touch tissue quantification (VTQ) technique and establish a reference range of shear-wave velocity in healthy liver of adults.Methods One hundred and sixty-one healthy adults underwent VTQ detection to obtain the shearwave velocities of livers.Each subject received VTQ measurement in four parts of liver.Ten subjects were performed twice by two sonographers,respectively.Results ① The liver shear-wave velocities of 161 healthy adults had a 95％ confidence interval from 1.089 to 1.105 m/s.Shear-wave speed values of intrahepatic different parts had no statistically significant.The ICC of measurement value of four parts in healthy liver was 0.80(95 ％ CI:0.75- 0.85).②The difference of shear-wave velocities in healthy livers in different age groups had no statistically significant,whereas the mean values in different gender had statistically significant (P =0.001).③No statistically significant was observed between the mean shear-wave velocity values obtained by different operators (P =0.82).Conclusions The liver shear-wave velocities of the healthy group have a reference range from 1.089 to 1.105 m/s.VTQ technique has a good reproduction and stability,therefore,using this technology to assess hepatic stiffness is noninvasive and feasible.