Fig. 7
From: A simple method for establishing an ostrich model of femoral head osteonecrosis and collapse
The radiographic imaging findings. a The X-ray imaging of normal ostrich femur head. b The X-ray imaging of ostrich femur head at postoperative week 6: no significant changes were observed in the femoral head contour or bone density. c The X-ray imaging of ostrich femur head at postoperative week 12: alterations in the femoral head contour (arrow) and decrease in the height of the femoral head. d The X-ray imaging of the collapsed ostrich femur head: the collapsed femoral head and high-density shadows at the center of the femoral head (arrow)