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首页> 外文期刊>Radiology >Fat content of lumbar paraspinal muscles in patients with chronic low back pain and in asymptomatic volunteers: quantification with MR spectroscopy.
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Fat content of lumbar paraspinal muscles in patients with chronic low back pain and in asymptomatic volunteers: quantification with MR spectroscopy.

机译：慢性下腰痛患者和无症状志愿者腰椎旁肌肉的脂肪含量：MR光谱法定量。

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PURPOSE: To prospectively evaluate the fat content of paraspinal muscles by using proton magnetic resonance (MR) spectroscopy in patients with chronic low back pain (LBP) and in asymptomatic volunteers matched with regard to age, sex, and body mass index. MATERIALS AND METHODS: The study was approved by the responsible institutional review board. Informed consent was obtained from each patient and each volunteer. Single-voxel proton MR spectroscopy was used to measure the fat content of the lumbar multifidus and longissimus muscles in 25 patients (13 women, 12 men; mean age, 40.5 years) with chronic LBP and in 25 matched asymptomatic volunteers (13 women, 12 men; mean age, 39.8 years). The fat content was also graded semiquantitatively (grades 0-4). The relationship between fat content and LBP duration, LBP intensity, and self-rated disability was assessed (Pearson correlation). RESULTS: The mean percentage fat content of the multifidus muscle was 23.6% (95% confidence interval [CI]: 17.5%, 29.7%) in patients with chronic LBP and 14.5% (95% CI: 10.8%, 18.3%) in the volunteers (P = .014). The corresponding values for the longissimus muscle were 29.3% (95% CI: 23.4%, 35.3%) in patients with LBP and 26.0% (95% CI: 21.9%, 30.0%) in the volunteers (P = .66). The semiquantitative grading of the fat content of the multifidus muscle was 0 in 12 (48%) of 25 patients and in 14 (56%) of 25 volunteers, 1 in 11 (44%) patients and in eight (32%) volunteers, and 2 in two (8%) patients and three (12%) volunteers. The semiquantitative grading of the fat content of the longissimus muscle was 0 in nine (36%) of 25 patients and 15 (60%) of 25 volunteers, 1 in 13 (52%) patients and nine (36%) volunteers, and 2 in three (12%) patients and one (4%) volunteer. Neither grade 3 nor grade 4 was assigned to any muscle. The grading differences were not significant between patients and volunteers. No significant correlation was found between fat content and pain intensity, pain duration, or self-rated disability. CONCLUSION: Proton MRspectroscopy demonstrates a significantly higher fat content in the multifidus muscle in patients with chronic LBP than in asymptomatic volunteers. No difference was detected with a semiquantitative grading system.
机译：目的：通过质子磁共振（MR）光谱技术对患有慢性下背痛（LBP）的患者以及无症状志愿者（年龄，性别和体重指数相匹配）进行前瞻性评估，以评估椎旁肌肉的脂肪含量。材料与方法：该研究得到负责任的机构审查委员会的批准。从每个患者和每个志愿者获得知情同意。单体素质子MR光谱法用于测量25名慢性LBP患者（13名女性，12名男性;平均年龄，40.5岁）和25名匹配的无症状志愿者（13名女性，12名）的腰部多裂肌和最长肌的脂肪含量男性;平均年龄39.8岁。脂肪含量也被半定量分级（0-4级）。评估了脂肪含量与LBP持续时间，LBP强度和自我评估的残疾之间的关系（Pearson相关性）。结果：慢性LBP患者多指肌平均脂肪含量百分比为23.6％（95％置信区间[CI]：17.5％，29.7％），而在慢性LBP患者中为14.5％（95％CI：10.8％，18.3％）。志愿者（P = 0.014）。在LBP患者中，最长肌的相应值为29.3％（95％CI：23.4％，35.3％），在志愿者中为26.0％（95％CI：21.9％，30.0％）（P = .66）。多裂肌脂肪含量的半定量分级为25名患者中的12名（48％）为0，25名志愿者中的14名（56％），11名患者中的1名（44％）和8名患者（32％），以及每2名（8％）患者和2名（12％）志愿者中的2名。在25名患者中有9名（36％），在25名志愿者中有15名（60％），1名（13％（52％）患者和9名（36％）自愿者）中的Longsimsimus脂肪含量的半定量等级为0三（12％）名患者和一名（4％）志愿者。 3级和4级均未分配给任何肌肉。患者和志愿者之间的等级差异不显着。脂肪含量与疼痛强度，疼痛持续时间或自我评估的残疾之间无显着相关性。结论：质子核磁共振波谱显示，慢性腰痛的患者多裂肌中的脂肪含量明显高于无症状志愿者。半定量分级系统未检测到差异。

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