“It still gets people surprised,” Milstein says. “Everybody asks, what about the head? But we’re actually able to reduce the effective dose by 60 percent without protecting the head, the arms, or even the legs.”

Whilst I understand the maths here, I can see why someone would be nervous!

You need to protect anything with relatively fast dividing cells best because this is where the cancer risk is highest. The brain with its slow dividing cells and fast killing tumors is the last thing to protect.

It's ok, everything except your brain will be protected from radiation!