Research Article

The Role of 99mTc-Annexin V Apoptosis Scintigraphy in Visualizing Early Stage Glucocorticoid-Induced Femoral Head Osteonecrosis in the Rabbit

Figure 5

Apoptotic frequency as a function of time after treatment by TUNEL assay. The frequency of apoptosis as assessed by TUNEL in rabbits sacrificed at 5, 6, and 8 weeks after methylprednisolone treatment. Control animals were treated with saline. Each treated point represents 4 femoral heads and 8 in the control group, .