agree
agree - I also used the ASTRO Radbio Study Guide - the new one should come out in the next month or so. The prior 2 years (2011, 2012) have questions that will not be repeated in 2013.
CLICK HERE for the 2010-2012 study guides.
and agree - this is a certification exam, not a first semester organic chemistry midterm. The goal is to verify that you have a certain fundamental level of radbio and rad physics knowledge... not to weed you out of med school (you made it past that part).