Fig. 1

A patient (age between 40 and 50) sustained a fracture of his left acetabulum after a fall. Due to thoracic and head trauma, the surgery was performed 67 days later when the patient was in stable general condition. a Preoperative anteroposterior radiographs and (b) computed tomography scans of the pelvis were performed. Ruptured and rotated fragments of the sciatic notch were suspected to be causing injury to the superior gluteal artery. c To obtain a clear diagnosis, the patient was examined with computed tomography angiography. d No obvious arterial damage was found on computed tomography angiography; however, geometric information regarding fractures and arteries cannot be obtained from two-dimensional images