When I got my first mri I took 2 vicoden and they put a towel over my eyes. I had to have them take me out and then went back in and finished. The second one the tech put me in backwards when I told him I was somewhat claustrophobic.
I understand your work problem. I am a farmer and I have to do my work. I have had to modify how I do most jobs.
Many of us do understand the pain.