The aim of any treatment is to minimize the disability and minimize the pain caused from avascular necrosis. I start with diagnostic evaluation, which starts with an x-ray. In cases with a very high clinical suspicion, I do a bone scan or an MRI. As discussed, the bone scan may show a cold spot in Stage 0 of avascular necrosis and the x-rays are essentially normal. The MRI is more useful in the earlier stages of the disease.