Volume 30, Issue 2, 2021
DOI: 10.24205/03276716.2020.4057
Exploration on evaluation effects of CT and low-field MR on the outcomes of patients undergoing microendoscopic discectomy via posterior interlaminar approach
Abstract
To observe and compare the advantages and values of CT and low-field MR in the evaluation of the outcomes of patients, undergoing microendoscopic discectomy via posterior interlaminar approach. A total 160 examinees screened by inclusion and exclusion criteria were enrolled, and a total of 800 intervertebral disks were involved. The first-echo image was collected by low-field MR; the effect of microendoscopic discectomy via posterior interlaminar approach was evaluated by CT, and the structural integrity distribution statuses of osseous endplate , cartilage endplate and fibrous ring were evaluated ; different degrees of intervertebral disc degeneration were analyzed by T2WI sequence, and the structural integrities of cartilage endplate, fibrous ring and osseous endplate were evaluated using low field double echo MR. The correlation among various indexes was analyzed, and the correlation analysis of the two categorical variables was conducted using rank correlation analysis. Low field MR sequence showed no significant differences in the structural integrities of osseous endplate and cartilage endplate among patients without low back pain symptoms (p > 0.05), the proportion of partial structure disappearance was the highest, and the proportion of complete structure disappearance was the lowest; while there was a significant difference in the structural integrity of fibrous ring, of which, the proportion of complete structure disappearance in low back pain group was higher , and the proportion of partial structure disappearance in non-low back pain group was higher, and there was a significant difference between the two groups (p > 0.05).The proportions of intact structure indicated no significant difference between the two groups (p >0.05). CT revealed no significant differences in the degree of postoperative intervertebral disc degeneration between the patients with or without low back pain (p > 0.05). There was no correlation between low back pain and intervertebral disc degeneration. Low field MR showed that the presence or absence of low back pain had correlation with the structural integrity, distribution, T2WI sequence and different degeneration degrees (p < 0.05). The presence or absence of low back pain has little correlation with the degree of postoperative intervertebral disc degeneration on T2WI. Low field MR showed that the structural integrities of fibrous ring and cartilage endplate are positively correlated with different degrees of intervertebral disc degeneration.
Keywords
CT; low field MR; lumbar transverse section; postoperative intervertebral disc degeneration