低剂量肺部CT与腹部MRI测量腹部脂肪结果的相关性分析

Objective To investigate the correlation and consistency between abdominal fat quantified from abdominal data of low-dose chest computed tomography(CT) and magnetic resonance imaging(MRI) measurements. Methods A total of 120 healthy volunteers who underwent low-dose chest CT scanning during physical examination were recruited for abdominal MRI examination. The areas of subcutaneous abdominal fat and visceral fat, as well as liver fat fraction, were measured respectively. The correlation and consistency of the measurement results between the two examination methods were compared. Results The measurement results of fat ratio and liver fat fraction by both CT and MRI showed nonnormal distribution. Wilcoxon test revealed significant differences in fat ratio and liver fat fraction measured by CT and MRI. Spearman correlation analysis demonstrated a high correlation between the fat ratio and liver fat fraction measured by the two methods. Bland-Altman analysis indicated a systematic bias in the measurement results of fat ratio and liver fat fraction, but good consistency in liver fat content. Conclusion Abdominal fat quantified from abdominal data of low-dose chest CT is significantly correlated with and has good consistency with MRI measurements.