@jeff_w wow, that is scary! did you ever have a brain MRI lying flat? i'm guessing you did? that would be weird that it wouldn't show anything considering you were feeling so bad even when lying flat
@Rlman -
The problem is with neurosurgeons. They aren't trained to evaluate MRIs for craniocervical instability/settling *unless* it results from an acute trauma. In those trauma cases, it presents differently on imaging, and they'll find it. There are literally only a handful of neurosurgeons in the world who are capable of diagnosing this problem when it does not occur from an injury.
To answer your questions: I had MRIs while flat. I was told by Cedars-Sinai neurosurgeons that the flat MRIs were "fine," "not even equivocal." But, flat imaging still showed problems. It's just way more subtle and very likely to be missed, so flat imaging is not recommended. It leads to missed diagnoses, which leads to being dismissed by doctors.
I also had a
flat flexion-extension CT scan. This scan was useful, because it was dynamic imaging (flexion-extension) rather than taken with me lying still. This scan confirmed ligamentous laxity, cranial settling, occipiticervical dissociation, and brain stem compression. My upper spinal column was protruding into my skull, crushing my brain stem.
However! The neurosurgeon who ordered that flexion-extension CT and interpreted it was already looking for those problems. He is also the very top neurosurgeon at Cedars-Sinai in Los Angeles, CA.
All of the neurosurgeons working under him missed my problem completely.