<prompt> A 40 year old male female patient on long term steroid therapy presents with recent onset of severe pain in the right hip. Imaginf modality of choice for this problem is:CT scanBone scanMRIPlain X-ray  <response>: C i.e., MRI A known complication of long term steroid uptake and chronic alcoholism is avascular necrosis of hip. MR scanning is the most sensitive and specific means of detecting changes in avascular necrosisQ. Sensitivity Specificity approach 100. 