The Anatomic Structure and Dimensions of Screw Pathways in the Pelvis
utilizing 100 normal male and 100 normal female bony pelvic CT scans, the anatomic pathways for the anterior column screw, posterior column screw, and iliosacral screw will be measured. The average dimensions of each pathway will be determined. utilizing these measurements, the optimal starting points for each of these screws will be determined.
200 normal pelvic CT scans (100 male, 100 female) in patients with age > 18 years will be collected from the PACS system. Normal bony pelvic CT scans with axial, coronal, and sagittal images will be utilized.