Research of classification of magnetic resonance imaging of lumbar interspinous ligaments degeneration

Objective To study the reliability of magnetic resonance imaging(MRI) grading system for lumbar interspinous ligaments degeneration.Methods MRI grading system for lumbar interspinous ligaments degeneration was designed.One hundred lumbar interspinous ligaments degeneration were performed with MRI grade by the median sagittal T1-and T2-weighted images,and the reliability of the MRI grading system was evaluated.Results The MRI grade of one hundred lumbar interspinous ligaments degeneration were:43.0%-51.0% in grade A,38.0%-46.0% in grade B,3.0%-6.0% in grade C,5.0%-9.0% in grade D.In all the reader,the internal consistency was excellent,and the value of kappa was 0.865-0.931.But the inter-consistency was low slightly,and the value of kappa was 0.727-0.823.In all the reader,the difference of A,B grade was higher than that of B,C and C,D grade,the difference of A,C grade was higher than that of B,D grade.Conclusion The MRI grading system for lumbar interspinous ligaments degeneration is simple,reliable and repeatable.