Fig. 1From: Intraoperative evaluation using mobile computed tomography in anterior cervical decompression with floating method for massive ossification of the posterior longitudinal ligament a Preoperative (Pre-op) and postoperative (Post-op) CT (computed tomography) images in the axial plane showed complete floating of ossification of the posterior longitudinal ligament (OPLL). b Insufficient floating of OPLL due to the “impingement” between OPLL and medial aspect of the uncovertebral jointBack to article page