Jo Mar I would be glad to tell you if I could remember it. I just remember Dr. Tintner called it an MRI and that it was new and definitive. I also do not remember them injecting dye as was stated in the DAT SCAN. But we have had a very rocky year; I am exhausted and my memory is not best right now. Since we no longer go to Dr Tintner I cannot ask him. We have found an 83 year old Neurologist who still practices and is the gentlest doctor I have ever known. He offices both in Houston but also one morning a week in our small town about 75 miles away because he weekends at his ranch here. I enjoy how he combines todays ideas with ones he used 50 years ago in problem solving. I wish I could answer your question.