The Tuffest Stuff CT Registry Prep Solution is an online, on-demand test preparation service that helps Radiologic Technologists (RTs) prepare to achieve their Computed Tomography (CT) designation. Our approach focuses on the most difficult aspects of the ARRT CT Registry exam. RT’s are given access to our award winning 16 Hour Course which includes mock exams, study material, and quizzes and worksheets so they are confident then they sit for the exam.