tatianne:
I've had numerous follow-up MRI scans and every single one was with contrast. The pre-scan blood test is now mandatory but I can have it done locally and the results faxed to the MRI center a few days before the MRI, making it easy. Once the blood test results didn't get sent to the MRI center so they just called the hospital for the results and had them within minutes via fax. While I wouldn't lose sleep over a non-contrast MRI, as Phyl mentioned, I would have questioned the order and insisted your doctor be contacted for verification.
If this is a major concern for you - and it appears to be - I would strongly suggest you contact your doctor and confirm his original order and the explanation the MRI tech gave you. You can always have another MRI. Unlike some tests, multiple MRI scans have no deleterious effect. I should know. I've had 8 in the past 20 months. Fortunately, all is well; the AN is shrinking and in necrosis. I wish the same results for you.
Jim