Aaron D. Sodickson
Brigham & Womens Hospital,
The objective of this talk is to convey some understanding about the approximate levels of risk imparted by CT, and the factors influencing these risks. I will review common radiation terminology, typical dose values for common CT exam types, and technology and patient factors that influence dose. I will demonstrate how to make order of magnitude cancer risk estimates using the most common Linear-No-Threshold risk model. Finally, we will explore practical opportunities to reduce radiation exposure, including potential opportunity areas where MRI may play a role if the common challenges of access, exam duration, and technical complexity can be overcome.