The lesions of cervical spondylosis are mainly the herniated discs of the cervical spine and the corresponding manifestations such as compression of the spinal canal or nerve roots. In order to confirm the diagnosis, it is necessary to do an MRI, which can only show the curvature of the cervical spine and whether there is a swelling or other lesion in the vertebrae, but not the performance of the spinal canal, and only the size of the intervertebral foramen, which is not necessarily unique to cervical spondylosis. In addition, the MRI can reveal the specific stage of disc herniation and whether it is compressing the spinal cord or nerve roots. It is possible to see whether there is irritation of the vertebral artery and other lesions of the spinal cord based on the corresponding stage, which is superior to X-rays and CT in the diagnosis of cervical spondylosis.