You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 40 year old male female patient on long term steroid therapy presents with recent onset of severe pain in the right hip. Imaging modality of choice for this problem is - and explain in detail?
Recent onset of severe hip pain with given history of long term use of steroid suggests the diagnosis of Avascular necrosis. The investigation of choice for Avascular necrosis is MRI Hence the answer here is MRI