Comparison Thigh Skeletal Muscles between Snowboarding Halfpipe Athletes and Healthy Volunteers Using Quantitative Multi-Parameter Magnetic Resonance Imaging at Rest  

作　　者：He Sun Meng-Tao Xu Xiao-Qi Wang Meng-Hu Wang Bao-Heng Wang Feng-Zhe Wang Shi-Nong Pan 

机构地区：[1]Department of Radiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, China [2]Department of Radiology, The fourth Affiliated Hospital of China Medical University, Shenyang, Liaoning 110032, China [3]Chinese Freestyle Skiing Aerials team, General Administration of Sport, Beijing 100050, China [4]Affiliated Sports School, Shenyang Sport University, Shenyang, Liaoning 110102, China [5]Philips Healthcare, Beijing 100600, China [6]Snow Sports Center, Shenyang Sport University, Shenyang, Liaoning 110102, China

出　　处：《Chinese Medical Journal》2018年第9期1045-1050,共6页中华医学杂志（英文版）

基　　金：This work was supported by grants from the National Key Research and Development Program of China （No. 2016YFC0107102） and the National Natural Science Foundation of China （No. 30871211 and No. 81271538）.

摘　　要：Background：Magnetic resonance （MR） imaging provides a unique,noninvasive diagnostic platform to quantify the physiological and biochemical variables of skeletal muscle at rest.This study was to investigate the difference in thigh skeletal muscles between snowboarding halfpipe athletes and healthy volunteers via multiparametric MR imaging.Methods：A comparative study was conducted between 12 healthy volunteers and 14 snowboarding halfpipe athletes.MR scanning targeted the left leg at the level of the proximal thigh on a 3.0T MR system.The measured parameters compared between the two groups included T1,T2,T2＊ relaxation times,fat fraction （FF）,and cross-sectional area （CSA） of the quadriceps femoris and the hamstring muscles.Statistical analysis was carried out using independent sample t-test.Interrater reliability was also assessed with intraclass correlation coefficients （ICCs）.Results：It was statistically equivalent between two groups in age,body mass index,thigh circumference,calf circumference,systolic blood pressure,and resting heart rate （all P ＞ 0.05）.However,the T1 and T2 values of the hamstring muscles in the athlete group were found to be significantly shorter than those in control group （T1：1063.3 ± 24.1 ms vs.1112.0 ± 38.2 ms in biceps femoris,1050.4 ± 31.2 ms vs.1095.0 ± 39.5 ms in semitendinosus,1053.1 ± 31.7 ms vs.1118.4 ± 40.0 ms in semimembranosus,respectively;T2：33.4 ± 0.7 ms vs.36.1 ± 1.9 ms in biceps femoris,34.6 ± 2.0 ms vs.37.0 ± 1.9 ms in semitendinosus,36.9 ± 1.5 ms vs.38.9 ± 2.4 ms in semimembranosus,respectively;all P ＜ 0.05） although T2＊ relaxation time was detected with no significant difference.The FF of the hamstring muscles was obviously less than the control group （5.5 ± 1.9％ vs.10.7 ± 4.7％,P ＜ 0.001）.In addition,the quadriceps＇ CSA in the athlete group was substantially larger than the control group （8039.0 ± 1072.3 vs.6258.2 ± 852.0 mm2,P ＜ 0.001）.Interrater reliability was excellent （ICC：0.758-0.994）Background：Magnetic resonance （MR） imaging provides a unique,noninvasive diagnostic platform to quantify the physiological and biochemical variables of skeletal muscle at rest.This study was to investigate the difference in thigh skeletal muscles between snowboarding halfpipe athletes and healthy volunteers via multiparametric MR imaging.Methods：A comparative study was conducted between 12 healthy volunteers and 14 snowboarding halfpipe athletes.MR scanning targeted the left leg at the level of the proximal thigh on a 3.0T MR system.The measured parameters compared between the two groups included T1,T2,T2＊ relaxation times,fat fraction （FF）,and cross-sectional area （CSA） of the quadriceps femoris and the hamstring muscles.Statistical analysis was carried out using independent sample t-test.Interrater reliability was also assessed with intraclass correlation coefficients （ICCs）.Results：It was statistically equivalent between two groups in age,body mass index,thigh circumference,calf circumference,systolic blood pressure,and resting heart rate （all P ＞ 0.05）.However,the T1 and T2 values of the hamstring muscles in the athlete group were found to be significantly shorter than those in control group （T1：1063.3 ± 24.1 ms vs.1112.0 ± 38.2 ms in biceps femoris,1050.4 ± 31.2 ms vs.1095.0 ± 39.5 ms in semitendinosus,1053.1 ± 31.7 ms vs.1118.4 ± 40.0 ms in semimembranosus,respectively;T2：33.4 ± 0.7 ms vs.36.1 ± 1.9 ms in biceps femoris,34.6 ± 2.0 ms vs.37.0 ± 1.9 ms in semitendinosus,36.9 ± 1.5 ms vs.38.9 ± 2.4 ms in semimembranosus,respectively;all P ＜ 0.05） although T2＊ relaxation time was detected with no significant difference.The FF of the hamstring muscles was obviously less than the control group （5.5 ± 1.9％ vs.10.7 ± 4.7％,P ＜ 0.001）.In addition,the quadriceps＇ CSA in the athlete group was substantially larger than the control group （8039.0 ± 1072.3 vs.6258.2 ± 852.0 mm2,P ＜ 0.001）.Interrater reliability was excellent （ICC：0.758-0.994）

关 键 词：Cross-sectional Area Fat Fraction Quantitative Magnetic Resonance Imaging Relaxation Time 

分 类 号：U666.7[交通运输工程—船舶及航道工程] G846[交通运输工程—船舶与海洋工程]