MRI技术在腰椎间盘突出症中对脊柱多裂肌的定量分析

Quantitative analysis of spine multifidus muscle in MRI technique in lumbar disc herniation

目的探讨腰椎间盘突出症伴神经压迫患者腰椎多裂肌的组成,通过采用磁共振成像(MRI)的定性和定量测量方法进行磁图分析。方法共纳入50例符合标准患者。由两位放射科医师回顾性测量所有患者多裂肌在MRI上的信号强度,并对单侧关节下腰椎间盘突出症患者的脂肪含量采用5点分级系统进行视觉分级。比较疝侧和对侧的表现,并评估了脂肪含量与神经压迫严重程度和症状持续时间的关系。结果在定量测量和定性评分方面,受影响一侧的多裂肌肉的信号强度明显高于对侧肌肉。在受影响的多裂肌肉中,神经受压程度与症状持续时间、脂肪含量呈显著相关(P<0.05)。结论与对侧相比,腰椎间盘突出症同侧多裂肌脂肪含量较高。关于脂肪浸润的肌肉成分的直观分级似乎和定量测量一样有用。

Objective To investigate the composition of lumbar spine muscles in patients with lum⁃bar disc herniation and neurological compression.Magnetic resonance imaging was performed by magnet⁃ic resonance imaging(MRI)qualitative and quantitative methods.Methods A total of 50 eligible pa⁃tients were included.The signal intensity of the multifidus muscles on MRI was retrospectively measured by two radiologists,and the fat content of patients with unilateral articular lumbar disc herniation was vi⁃sually graded using a 5⁃point grading system.The temporal and contralateral performance was compared and the relationship between fat content and the severity of nerve compression and duration of symptoms was assessed.Results In terms of quantitative measurements and qualitative scores,the signal intensity of the multi⁃cracked muscle on the affected side was significantly higher than that of the contralateral muscle.In the affected multi⁃cleft muscles,the degree of nerve compression was significantly correlated with duration of symptoms and fat content(P<0.05).Conclusion Compared with the contralateral side,lumbar disc herniation has a higher content of ipsilateral multifidus muscle fat.Visual grading of muscle components for fat infiltration seems to be as useful as quantitative measurements.