Specific absorbtion rate, or SAR is a measure of the energy deposited into the body by an MRI
. This desposited energy results in tissue
heating. Everybody needs their brain
cells warmed up a few degrees, right? A 3T MRI has a shorter scan time and there is less heating of the brain tissue.
So ask which scanner they are going to put you on.
CAT scans are yesterdays technology.
The nausea you experienced is a hallmark of a concusion.