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Correlation between quantitative computed tomography (QCT) and MR mDixon-quant for quantification of hepatic fat content
Pages: 456-461
Year: Issue:  5
Journal: Radiologic Practice

Abstract: Objective:To compare the consistency and correlation of quantitative computed tomography (QCT) method with MR mDixon-quant method for quantification of hepatic fat content in healthy people.Methods:Twenty-one men (aged 57 ~ 83 years) and thirty-two women (aged 54~80 years) underwent abdomen QCT and MR mDixon-quant examinations,and hepatic fat content was determined by two kinds of QCT calculation equations(Fat% QCT(ICRU),Fat% QcT(revised)) and MR mDixon-quant fat fraction (Fat%mDixon-quant).The results were compared between the male and female groups.The results by QCT were compared to MR mDixon-quant,and the correlation coefficients between QCT and MR mDixon-quant were calculated.Results:There was no significant difference in hepatic fat content between men and women in the study group.The mean(± standard deviation,SD) of Fat % QCT(IcRU) and Fat%QCT(revised) was (-0.09 % ± 4.88 %) and (8.66 % ±4.41%,respectively.Fat%QCT(ICRU) was significantly lower than Fat%mDixon-quant(P<0.01),and the mean (± SD) of difference was (-6.42 % ± 2.44 %).Fat % QCT(revised) was significantly higher than Fat % mDixon-quant (P<0.01),and the mean (± SD)of difference was (2.33 % ± 2.36 %).The correlation between Fat% QCT(revised) and Fat%mDixon-quant (r=0.708,P<0.01) was similar to that between Fat % QCT(ICRU) and Fat % mDixon-quant (r =0.7 0 7,P< 0.01).Conclusion:Compared to MR mDixon-quant,QCT using the revised calculation equations can measure hepatic fat content accurately in healthy Chinese population.
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