Abstract：Objective To investigate the efficacy and advantage of axially loaded position MRI for the diagnosis of lumbar degenerative disease (LDD).Methods To review 84 patients of LDD in the Second Affiliated Hospital of Chongqing Medical University from November 2013 to October 2014, and all the patients were examined by routine psoas relaxed position (RPRP) MRI and axially loaded position (ALP) MRI. Meanwhile, the size of the dural sac cross-sectional area (DSCA) was recorded. According to whether the symptom was replicable in extension position with axial loaded, all patients were divided into two groups (the negative and the positive groups). The difference of DSCA changes between these two groups was statistically analysed.Results Compared with RPRP, there was a significant decrease (>15 mm2) of the DSCA during ALP in 49 patients (58.3%, 49/84) and 76 disc levels (30.2%, 76/252). Meanwhile, the differences of DSCA between these two postures in L3/4, L4/5 or L5/S1 were statistically significant (all P values<0.05). Of note, in L4/5 and L5/S1, the variations of DSCA in the negative and the positive groups during ALP were statistically different (all P values<0.05). However, in L3/4, there was no statistical difference (P>0.05).Conclusions For LDD, compared with RPRP, the variations of DSCA in the negative and the positive groups during ALP are statistically different in L4/5 and L5/S1, and ALP can further improve the correlation between symptoms and MRI. And thus, it can also improve the positive rate, especially occult slippage and intervertebral foramen stenosis. Meanwhile, for the patients with inconsistent clinical symptoms, physical signs and imaging examination, the diagnostic value is superior.
张东杰,楚磊,陈亮,邓忠良. 轴向负荷MR检查在腰椎退行性疾病中的诊断价值[J]. 中华解剖与临床杂志, 2015, 20(4): 293-297.
Zhang Dongjie, Chu Lei, Chen Liang, Deng Zhongliang.. The diagnosis value of axially loaded position MRI for lumbar degenerative disease. Chinese Journal of Anatomy and Clinics, 2015, 20(4): 293-297.
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