Abstract: Sixty patients with lumbar spinal stenosis (LSS) were selected as the research group, and 60 healthy patients during the same period were selected as the control group. The diagnostic value of CT examination parameters in LSS and the correlation with the curative effect and the improvement of lumbar function were explored. The results showed that the spinal canal area, dural sac area, spinal sagittal diameter, spinal transverse diameter, lateral recess sagittal diameter, and lateral recess angle of the research group were smaller than those of the control group (P<0.05). The AUC value of CT parameters in the combined diagnosis of LSS was greater than that of any parameter alone. The spinal canal area, dural sac area, spinal sagittal diameter, lateral recess sagittal diameter and lateral recess angle of patients with excellent curative effect 3 months after the operation were larger than those before treatment and non-excellent patients (P<0.05). After partial correlation analysis, CT examination parameters were still significantly related to the efficacy (P<0.05). It shows that the efficacy of LSS and the improvement of lumbar spine function are closely related to the spinal canal area, dural sac area and spinal sagittal diameter. CT examination is of great significance in guiding the clinical improvement of the surgical plan.

Key words: CT, lumbar spinal stenosis, lumbar function, receiver operating characteristic curve, diagnostic value, curative effect