I had an MRI scan yesterday in one of the newer T3 scanners.
My neuro (or rather the registrar, who was way better than the neuro) requested an MRI of my brain and spine, with contrast. Yesterday I had an MRI of my brain and my neck region, without contrast.
I did ask the radiologist why I he hadn’t given me contrast, as he was loading me into the machine. His reply was that he’d probably be able to see everything clearly without it. When I got home I checked this out, and these T3 scanners are as good if not better than the T1.5 scanners with contrast, and that as the contrast dye can have adverse short term and longer effects, it makes sense to not use them if not needed. Seems a lot of hospitals don’t have T3 scanners yet.
My other question, which I did not ask the radiologist, was why as well as my brain, just my neck bit of the spinal chord was done, and not more of my spine. We had a general chat afterwards as part of the corridor got screened off so I couldn’t leave, and his next patient couldn’t get through, so we were both twiddling our thumbs. He said that the human body can only take so much time being scanned - the MRI scanner subjects the body to a big amount of energy, and what you can take is dependent on body size. I was in the scanner 30 minutes, which was, according to him, quick because I was able to keep really still so he didn’t have to redo any scans. He said with some people who keep moving around, he has to stop scanning, despite not scanning all that was needed, as they’ve had the full time time under the scanner that can be permitted for their body size. Children, who are the wriggliest, can only be there for a short time … so can be quite difficult!
So I’m thinking that perhaps the reason that more of my spine wasn’t done was because of the potential time in the scanner often makes it not possible, so they don’t plan to do it. I’ve noticed that people do seem to have more than one scan session. Just wondering if anyone knows the answer to this? Whether this is a correct surmise?
Also as part of our chat, he said these newer scanners can produce amazingly detailed pictures of the brain, showing all the nerves, blood vessels, and can build up incredible 3D pictures. (He might have been referring to the 7T scanners here.) He said that computers need to catch up - they are limiting factors, as well as the human body’s time limits under the scanner.