Femoral diaphyseal fractures are the domain of intramedullary nailing.

　　股骨干股骨干骨折是髓內釘固定區域。

　　Objective:To study CT features of avascular necrosis of femoral heads.

　　目的：探討股骨頭缺血性壞死的CT表現。

　　Objective To study MRI diagnosis of avascular necrosis of femoral head.

　　目的探討MRI對股骨頭缺血性壞死的診斷。