My cat is dying and I can't afford her vet fees.

[Barkingturtle]

Honestly, anything they find on an MRI that didn't show up in bloodwork is going to require an equal if not larger sum to provide any treatment -- if treatment is at all possible.

I've had a lot of animals. I used to own a boarding kennel. I once spent two grand to have a rod inserted in my cat's leg after it suffered a nasty break. I've never had a vet tell me we needed an MRI. Bloodwork and x-rays are enough. If they can't make a diagnosis with that information, it's simply time to make a quality of life determination and proceed with compassion.