doctor shows on ct mri scans place in spine between vertebrae, which is procedure of epidural anesthesia or spinal puncture conduc

act administration analgesia anesthesia bone canal cerebrospinal childbirth column computer concept conduct cord diagnosis diagnostic doctor during epidural fluid gynecology image injection lumbar mri neuroscience neurosurgeon neurosurgery neurosurgical obstetrics operation pain place pressure procedure puncture radiculopathy radiology ray relief sacral scans show spinal spine surgeon surgery tap technique tomography vertebrae