T2-mapping成像评估腰部背伸肌群运动前后功能状态

摘要

Objective To explore the value of T2-mapping imaging in assessment of lumbar dorsal extensors group (multifidus,longissimus and iliocostalis) function before and after exercises in healthy volunteers.Methods Totally 50 healthy young volunteers underwent T2-mapping imaging before and after exercises.T2 value and cross-section area (CSA) of multifidus,longissimus and iliocostalis were measured at the level of L3 and 14 superior border.Differences of CSA and T2 value were compared between left and right side muscles before and after exercises.The correlation between CSA difference and T2 difference before and after exercises was analyzed.Results At the level of L3 and L4 superior border,CSA and T2 value of bilateral multifidus,longissimus and iliocostalis increased after exercises (all P＜0.05).At the level of L3 superior border,CSA after exercises and CSA difference of left multifidus were higher than those of right side (all P＜0.05).Before exercises,there were statistical differences of T2 values on left and right side of longissimus and iliocostalis at the level of L3 superior border and the longissimus at the level of L4 superior border (all P＜0.05).Positive correlations were found between CSA difference and T2 difference on bilateral iliocostalis at the level of L3 and L4 superior border,as well as on bilateral multifidus at the level of L4 superior border (all P ＜0.05).Conclusion T2-mapping imaging can be used to assess the activity state of lumbar dorsal extensors group before and after exercises.%目的 探讨T2-mapping评估健康志愿者运动前后腰部背伸肌群(多裂肌、最长肌、髂肋肌)的价值.方法 对50名健康志愿者运动前后行T2-mapping序列扫描,于L3、L4上缘层面测量运动前后多裂肌、最长肌、髂肋肌的横截面积(CSA)及T2值,比较运动前后及左右侧上述肌肉CSA、T2值的差异,并分析运动前后各肌肉的CSA差值与T2值差值的相关性.结果 L3、L4椎体上缘水平双侧多裂肌、最长肌、髂肋肌运动后CSA、T2值均大于运动前(P均＜0.05).L3椎体上缘水平左侧多裂肌的运动后CSA及运动前后CSA差值均大于右侧(P均＜0.05).运动前L3椎体上缘水平左右侧最长肌、髂肋肌及L4椎体上缘水平左右侧最长肌的T2值差异均有统计学意义(P均＜0.05).L3、L4椎体上缘水平双侧髂肋肌及L4椎体上缘水平双侧多裂肌运动前后CSA差值与T2值差值呈正相关(P均＜0.05).结论 T2-mapping可用于评估腰部背伸肌群运动前后功能变化.