Eddie, I can hardly wait to see your results. I thought the chest didn't show up well on Doppler and needed the MRV with dye. They said the breast bone is in the way to see the Azygous vein in the spine/chest.
I am sure the color Doppler should be great for the 4 jugulars, did they do the sigmoid sinus in the head?
Was this using Dr. Zamboni's protocol? Good luck.