Abstract：
STUDY DESIGN:Prospective study. OBJECTIVES:To investigate whether preoperative and postoperative changes of signal intensity (SI) and transverse area (TA) of the spinal cord reflect the surgical outcome in patients with cervical spondylotic myelopathy (CSM). SETTING:The Second Hospital of Tangshan, Tangshan, Hebei, China. METHODS:In 45 consecutive prospective patients, magnetic resonance imaging (MRI) was performed preoperatively and 3 months postoperatively. The Japanese Orthopedic Association (JOA) scale was used to quantify the neurological status at admission and of at least 12-month follow-up. Preoperative and postoperative TA of the spinal cord at the site of maximal compression and grayscale of signal intensity (GSI) were measured using the image analysis software. Ratio of transverse area (RTA) and ratio of grayscale of signal intensity (RGSI) were used to assess the extent of spinal cord re-expansion and extent of SI regression. Preoperative status and postoperative recovery were assessed in relation to MRI parameters preoperatively and postoperatively using univariate and multivariate analysis. RESULTS:Higher baseline JOA scores were associated with larger TA. Greater recovery rate was associated with larger preoperative and postoperative TA, along with greater RTA. Recovery rate negatively correlated with RGSI and age. Higher baseline JOA score was associated with greater recovery rate. RGSI negatively correlated with RTA. Multivariate stepwise regression analysis showed that the optimal combination of surgical outcome predictors included age, postoperative TA and RGSI. CONCLUSION:Quantitative MRI analysis in CSM may provide reliable information for the prediction of the postoperative outcome of CSM patients. MRI indicators of good outcome include the larger postoperative TA and greater RGSI.
journal_name
Spinal Cordjournal_title
Spinal cordauthors
Sun LQ,Li YM,Wang X,Cao HCdoi
10.1038/sc.2014.204subject
Has Abstractpub_date
2015-06-01 00:00:00pages
488-93issue
6eissn
1362-4393issn
1476-5624pii
sc2014204journal_volume
53pub_type
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