I just cant beleive they dont have an MRI machine for her, perhaps not at that hospital, but other places do.
No physician is going to tell someone to go to a zoo - get real. They find a place or take care of the situation.
As for someone overweight, many times it is the fault of the person, but other times it is not.
As you grow older, your metabolism slows a lot faster than you realize.
And yes, you need to consider to eat less, or at least, think about things.