T1ρ成像技术诊断青少年跳水运动员桡骨远端骺板损伤

T1ρ imaging in diagnosing distal radial epiphyseal plate injury of teenager divers

目的探讨定量T1ρ成像在青少年跳水运动员桡骨远端骺板损伤中的应用价值。方法对38例青少年跳水运动员和25名年龄、性别相匹配的健康志愿者(对照组)进行双侧腕关节MR扫描,包括常规序列和定量T1ρ序列。根据常规MRI将运动员桡骨远端骺板损伤腕关节归为骺板损伤亚组,未见桡骨远端骺板损伤腕关节归为无骺板损伤亚组。在T1ρ伪彩图上测量3组桡骨远端骺板舟骨相对面区、月骨相对面区、外侧区的T1ρ值,比较3组T1ρ值及同组内不同区域T1ρ值的差异。结果骺板损伤亚组、无骺板损伤亚组桡骨远端骺板的T1ρ值低于对照组(P均<0.001),但骺板损伤亚组、无骺板损伤亚组间差异无统计学意义(P=0.881)。3组桡骨远端骺板的舟骨相对面区、月骨相对面区、外侧区T1ρ值差异均无统计学意义(P均>0.05)。结论T1ρ序列有助于发现青年跳水运动员桡骨远端骺板损伤内部超微结构和细胞分子水平改变。

Objective To explore the application value of quantitative T1ρimaging in distal radial epiphyseal plate injury of teenager divers.Methods Totally 38 young diving athletes and 25 age-,sex-matched healthy volunteers(control group)underwent bilateral wrist conventional and quantitative T1ρsequence MR scanning.According to conventional MRI,the athletes were divided into epiphyseal plate injury subgroup and no epiphyseal plate injury subgroup.T1ρvalues of distal radial epiphyseal plate different of opposite the boat phrenology area,opposite the month phrenology area and the lateral area were separately measured on T1ρpseudo-color pictures.T1ρvalues of distal radial epiphyseal plate were analyzed among groups and different ROI in same groups.Results T1ρvalue of distal radial epiphyseal plate in epiphyseal plate injury subgroup and no epiphyseal plate injury subgroup were lower than that in control group(both P<0.001),while no significant difference was found between epiphyseal plate injury subgroup and no epiphyseal plate injury subgroup(P=0.881).T1ρvalue of distal radial epiphyseal plate at opposite the boat phrenology area,opposite the month phrenology area and the lateral area had no significant difference among groups(all P>0.05).Conclusion Quantitative T1ρimaging helps to discover changes of internal ultrastructure and cell molecular level in distal radial epiphyseal plate injury of the diver.