Abstract:

Objective　To study the difference in the detection of facet joint effusion in lumbar spine between supine natural and supine anterior flexion positions by magnetic resonance imaging (MRI). Methods　Forty-three patients with intervertebral facet joint effusion found by MRI at Laiyang Center Hospital of Yantai City because of lumber spine diseases (lumber pain and numb loser limbs) from December 2021 to May 2022 were selected for the prospective study, including 22 males and 21 females who were (43.2±13.6) years old. The 1.5T superconducting dual gradient MRI scanner was used to perform the paired examination in supine natural position and supine anterior flexion position, and to measure the bilateral facet joint effusion at L3/4 to L5/S1 levels in both positions. The Wilcoxon signed rank test was used to compare the detection amounts of vertebral joint effusion in supine natural position and supine anterior flexion position. Results　The amounts of facet joint effusion in the L3/4 and L4/5 in the supine flexion position (L3/4 right: 1.09 mm, left: 1.12 mm; L4/5 right: 1.05 mm, left: 1.10 mm) were higher than those in the supine natural position (L3/4 right: 0.77 mm, left: 0.84 mm; L4/5 right: 0.85 mm, left: 0.70 mm), with statistical differences (Z=4.114, 4.313, 3.350, and 3.616; all P<0.05). There were no statistical difference in the amounts at the L5/S1 level between the two positions (Z=1.368 and 2.085; both P>0.05). Conclusion　MRI examination of the lumbar intervertebral disc in supine flexion position plays a more important role in detecting effusion in vertebral facet joints.

Key words:

Magnetic resonance imaging, Lumbar facet joint effusion, Supine flexion position, Supine natural position

摘要：

目的　研究腰椎磁共振成像（MRI）检查下仰卧自然位及仰卧前屈位对椎间小关节积液检出的差异。方法　前瞻性研究，选取2021年12月至2022年5月因腰椎疾患（包括腰痛及下肢疼痛麻木）在烟台市莱阳中心医院就诊行MRI检查发现椎小关节积液患者共43例作为研究对象，其中男22例、女21例，年龄（43.2±13.6）岁。应用1.5T超导型双梯度MRI扫描仪行仰卧自然位及仰卧前屈位配对检查，测量两种体位中L3/4～L5/S1层面双侧椎小关节积液情况。仰卧自然位及仰卧前屈位椎小关节积液检出量比较采用Wilcoxon符号秩检验。结果　L3/4、L4/5层面仰卧前屈位（L3/4右侧：1.09 mm，左侧：1.12 mm；L4/5右侧：1.05 mm，左侧：1.10 mm）对椎小关节积液的检出量均高于仰卧自然位（L3/4右侧：0.77 mm，左侧：0.84 mm；L4/5右侧：0.85 mm，左侧：0.70 mm），差异均有统计学意义（Z=4.114、4.313、3.350、3.616，均P<0.05）；L5/S1层面两种体位之间比较，差异均无统计学意义（Z=1.368、2.085，均P>0.05）。结论　采用仰卧前屈位腰椎间盘MRI检查对椎小关节积液检出具有更加重要的作用。

关键词:

磁共振成像, 腰椎小关节积液, 仰卧前屈位, 仰卧自然位