I sustained a severe ankle sprain on October 10, and after a trip to the ER on the 14th, and a trip to an ortho on the 16th, no MRI was ordered. I am a bit confused by this. There were xrays taken on the 10th, 14th, and on the16th, but no MRI. The ortho stated that he did not believe the MRI would show anything additional above and beyond what the xrays and their examination had shown. Can someone shed a bit more light on the decision not ro MRI?