You need a chest x-ray done and go from there.
Health tech? Is this a physician? I am assuming it is not. Please consult a physician about this and request a chest x-ray.
You should be concerned.
I wouldn't assume a problem with the lungs would show up on an MRI for your spine.
How long ago was this MRI done?
No imaging of lungs specifically... but assumed from the MRIs (from the bottom of my spine to my head - for back problem) I had done several years ago they would have noted anything abnormal
I would have this further investigated especially if you are certain you were exposed to asbestos.
Any imaging of your lungs taken? i.e. simple chest x-ray, CT?