Quantitative measurement of supraclavicular adipose tissue in healthy young women with IDEAL-IQ technique / 中国医学影像技术

ABSTRACT

Objective To assess the feasibility of quantitative measurement of subcutaneous and supraclavicular adipose tissue with iterative decomposition of water and fat with echo asymmetry and least square estimation-iron quantification sequence (IDEAL-IQ).Methods Totally 87 normal young female volunteers (20-35 years old) were recruited and divided into body mass index (BMI)＜24 kg/m2 group (n=72) and BMI≥24 kg/m2 group (n=15).Fat fraction (FF) and T2* relaxation rate (R2*) of supraclavicular adipose tissue,chest wall adipose tissue,abdominal wall adipose tissue and liver were measured,respectively.The differences of FF and R2* value of chest wall,subcutaneous and supraclavicular adipose tissue were compared between two groups,and the correlation between FF,R2* value of supraclavicular adipose tissue and BMI was respectively analyzed.Results FF of supraclavicular adipose tissue ([80.99 ± 7.73]％) was lower than that of chest wall subcutaneous adipose tissue ([93.04 ± 1.55] ％,P＜0.001).R2* of supraclavicular adipose tissue ([65.52±23.59]Hz) was higher than that of chest wall subcutaneous adipose tissue ([38.82±7.11]Hz,P＜0.001).The differences of FF and R2* values of supraclavicular adipose tissue,chest wall,abdominal wall subcutaneous adipose tissue and liver were significant between BMI＜24 kg/m2 group and BMI≥24 kg/m2 group (all P＜0.05).There was positive correlation (r=0.601,P＜0.001) between FF of supraclavicular adipose tissue and BMI and negative correlation (r=-0.409,P =0.001) between R2* of supraclavicular adipose tissue and BMI.Conclusion IDEAL-IQ technique can quantitatively assess the difference between subcutaneous and supraclavicular adipose tissue in healthy young women.FF and R2 * value has significant difference between the above mentioned positions.