兔肝动脉碘分数与肝动脉指数的相关性

Correlation between hepatic arterial iodine fraction and hepatic arterial index of rabbits

目的探讨能谱CT多期扫描计算的肝动脉碘分数(AIF)与肝CT灌注的肝动脉指数(HAI)的相关性及一致性。方法选取日本大耳白兔15只,行肝CT灌注扫描获得HAI后,以能谱CT多期扫描获取AIF,以相关性分析观察两者之间的相关性,以Bland-Altman图观察两者之间的一致性。结果肝CT灌注扫描的HAI为0.26±0.02,能谱CT扫描计算的AIF为0.25±0.02,两者之间的相关系数为0.979(P<0.05),两者的一致性较好。结论 AIF与HAI相关性、一致性较好,能谱CT扫描可观察肝血流动力学。

Objective To compare the correlation and consistency between hepatic arterial fraction（AIF） calculated from gemstone spectral imaging scan and hepatic arterial index（HAI） measured with perfusion CT.Methods Totally 15 Japanese white rabbits were enrolled.HAI was obtained from perfusion CT,then AIF was got from spectral CT.AIF and HAI were compared with correlation test and Bland-Altman Plot.Results The mean HAI was 0.26±0.02,and the AIF was 0.25±0.02.There was strong positive correlation between HAI and AIF（r=0.979,P0.05）,and measurement consistency between the two parameters was high.Conclusion AIF obtained from spectral CT examination correlates strongly with HAI obtained from liver perfusion CT,which can be regarded as a new parameter for evaluating liver hemodynamics.