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| Research on MRI Disc Localization and Degeneration Classification Based on Gabor Feature |
1 College of Information Science and Engineering, Huaqiao University, Xiamen 361021，Fujian, China
2Department of Orthopaedics, 113th Hospital of PLA, Ningbo 315040, Zhejiang, China
3 Fifth Laboratory, Research Institute of Field Surgery, Daping Hospital, Third Military Medical University of Chinese PLA, State Key Laboratory for Trauma, Burn and Combined Injury, Chongqing 400042, China
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Abstract An unsupervised method based on Gabor feature for localizing intervertebral discs (IVDs) automatically and classifying disc degeneration was proposed in this paper. At first, a series of Gaborfiltered spine images were obtained in order to extract the information of spine edges and disc edges based on which the areas of spines could be determined. After that, on the basis of the prior knowledge,the exact location of IVDs in the spines were calculated. Finally, associating localization results with Gabor coefficients, the classification of IVD degeneration was realized based on gray information of nucleus pulposus and annulus fibrosis which were obtained by ellipse fitting. Experiments were performed in a dataset of 37 patients, the results showed that our method was simpler than the existing methods while with a similar accuracy of 966%, and it increased the precision to 1.46 mm. Besides, the degeneration classification of level 1-5 could be realized by our classification algorithm.
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