Your symptoms of low back pain, leg numbness/tingling, and bladder problems require prompt evaluation, and MRI is the best investigation to assess the spinal nerves. If you have a fear of closed spaces, discuss this with your doctor. MRI can be safely performed under short general anaesthesia or sedation, which is usually a day-care procedure, allowing you to go home the same day in most cases.

Then you can take your mother to the doctors you visited or to some other doctor of her choice

Ask your mother the reason for refusing mri And take her to doctors so that they can explain her the importance of the same