Hello and welcome to HCM. As an Urologist,i can understand her anxiety. To diagnose a stone,a plain CT scan is enough. MRI isn t done routinely. If no stone s seen,there s no stone present.An ultrasound-KUB is done first. Urine routine may show blood cells.Mostly the pain is likely due to disc changes. She s advised to have regular physiotherapy for the back pain. It would be good to write,if she s taking any other medication. If you ve any other doubts,send them to me,as a direct question. Dr.Matthew J. Mangat.