A Neuro Psych can do a Neuro Psych Assessment which is a battery of tests to measure your brains ability to function. Reaction time, memory, executive functioning, etc, can be quantified.

The MRI and CT Scans rarely show any abnormalities.

Did you mean the MRI was only a 3 Tesla ? That is more powerful than most. 1.5 is the norm. 6 Tesla MRI's are usually in research. Diffusion Tensored Imaging is a common MRI process for brain injuries.

Either way, other than dealing with a continuing bleed. imaging does not change much. It rarely provides a better treatment direction. It is used to rule out serious conditions, not diagnose any of the common concussion issues.

What are your current symptoms ?