Fig. 4
From: Ultrasonic bone scalpel for thoracic spinal decompression: case series and technical note
Illustrative case presentation (case 18). a–c Preoperative X-ray, sagittal MRI, and CT images reveal multiple segment OPLL and isolated OLF in the thoracic spine. d Axial CT image indicates decompression segment OPLL. e Axial CT image shows complete resection of OPLL. f–g Postoperative X-ray and CT images show OPLL resection and stable internal fixation. OPLL, ossification of posterior longitudinal ligament; OLF, ossification of the ligamentum flavum