目的 CT评估应用于常规的手工绘制感兴趣区(ROI)法和半自动容积分析方法对肝脏肿瘤密度衰减值测量的可重复性。材料与方法该项回顾性研究符合HIPAA并得到机构审查委员会的批准,免除病人知情同意。在多层螺旋CT门静脉期相上,采用单一ROI、同一层面3个ROI的平均值,以及半自动勾划整个肿瘤容积(容积的密度衰减值)的方 Objective CT assessment is used to measure the repeatability of liver tumor density attenuation values ​​using conventional hand-drawn ROI and semi-automatic volumetric methods. Materials and Methods The retrospective study was HIPAA approved by the Institutional Review Board and informed consent was waived. On the MSCT portal phase, a single ROI, mean of three ROIs on the same level, and a semi-automatic delineation of the entire tumor volume (volume density attenuation)