12 reviewers will be given the different imaging of each case and will be divided in 4 groups: novice (junior ER and ortho residents), intermediate (non-experimented orthopedic surgeons), intermediate with a formation on classifying acetabular fractures and finally experts (acetabular fracture expert surgeons) . For each patient, representative CT scans are provided for each assessment. The study will be divided into 3 phases separated by 4-6 weeks of time. In the first phase, for each patient, representative CT scans are provided for each assessment with 2D and multiplanar reconstruction (MPR) without 3D views. In the second phase, 3D views are added. In the third phase, the cases are evaluated using the "Acetabular Diagnosis Tool" To note, the evaluation of the cases is done twice in each phase separated by 4-6 weeks and the order of the cases is changed, both in order to minimize recall bias