<prompt> A 48 year old man known to you with a long history of low back pain, presents once again with similar symptoms. He has had a previous X - ray showing degenerative disc changes 6 years earlier. What is to be done next?Repeat X-ray should be doneX-Ray should not be repeatedIf any systemic disease suspected, MRI should be doneIf suspected neurological deficit CT should be done  <response>: In the absence of any red flag signs, there is no indication for fuher X - rays. Red flag signs: Thoracic pain Fever Weight loss Bladder or bowel dysfunction Carcinoma history Neurological deficit Onset 20 years or 55 years. For neurological symptoms, MRIa best to examine just the spine. If systemic disease was suspected, CT would be best 