a) Post-operative CT scan of lumbosacral spine, axial view, demonstrating the trajectory of the iliac screws placed through the ilium. b) anterior-posterior post-operative x-ray illustrating a spinopelvic fixation construct. a) Post-operative CT scan of lumbosacral spine, axial view, demonstrating the trajectory of the iliac screws placed through the ilium. b) anterior-posterior post-operative x-ray illustrating a spinopelvic fixation construct. Jared Fridley et al. Int J Spine Surg 2014;8:3 Copyright © 2014 ISASS - International Society for the Advancement of Spine Surgery