We have them, but not enough. The ones we do have are rationed. It's actually faster to get an MRI for your dog than for yourself because humans aren't allowed to pay for their own; several hospitals run the MRIs for human patients during the day and top up the budget by doing scans for veterinarians at night. BTW there's a clinic in Buffalo that advertises only in Southern Ontario; they make a bundle from patients who would prefer to shell out a grand or so instead of waiting six months.