MRI is for best for seeing soft tissue, CT is best for bone, so MRI is the best at imaging the soft tissue areas that will show signs. I have to say that these signs are often dismissed on the radiology report. Here’s my MRI annotated with some of the things the radiologist should be looking for, it might be worth taking this in and asking them to specifically look for it.
These are signs, some quite subtle and easily missed, that show there’s a hinderence to cerebro spinal fluid (CSF) flow, both around the brain and, between the brain and the spinal column. This hinderence of the CSF flow leads to a build up of intracranial pressure, which could be what’s producing some of the symptoms you describe.