I have done a full contrast-enhanced MRI scan of the brain with a high-res scanner the clinic just purchased a year ago, a brand new Siemens. I was sick as a dog and they found absolutely nothing...
However as a side note, my blood was full of spirochetes that were visible under DFM.
/en.wikipedia.org/wiki/Dark_field_microscopyThat was my first positive test, then i've done lots of other non-imagistic tests that came back positive (WB, bartonella immunofluorescence, LTTs, CD57, etc...)