I've only ever been in an MRI scanner twice, the first time being claustrophobic I panicked as I wasn't given any sedation and nearly fell out of the scanner in my haste to get out of the scanning room, this was a couple of minutes into the scan. Because of this experience I managed to find an open scanner which was a much less traumatic experience, but was disappointed when the consultant neurologist on reviewing the images said that they weren't as clear as they would have been if taken in a closed scanner.
This was a few years ago and although I'm not planning to have any more MRI scans at the moment I was wondering if the situation cropped up again whether scanner technology has evolved to close that gap now?