4This is the ultimate tool to use to study for the Radiation Therapy Registry and for those studying for CQR testing. It outlines and explains important components for the test. Provides useful math equations. Two mock exams with a total of 400 example test questions.Former students who have used this guide explained it as: "Thorough, concise, and organized.""The perfect registry prep!""It was my go-to study tool and played a big role in my exam success.""The best source I can use for the registry."This version has been updated as of 12/2/20 to fix any errors