Accuracy: MRA V Transcranial Doppler (TCD)?
I have had an MRA which showed a 'complete' Circle of Willis, so docs won't authorize a TCD. I would like to have it done, for I believe it is more "specialized". I am not in the medical field, but doesn't this equipment show the % of blood getting-to the brain and the velocity?
Could you please explain what information can be obtained using a TCD?
Thanks so much for your time!