Technologist will also practice radiation safety techniques with the ALARA principle in mind, using beam restrictive devices, patient shielding skills, and knowledge of applicable exposure factors, to maximize radiation protection to patient and staff. CERTIFICATE/LICENSES • Registered with the American Registry of Radiologic Technologists • Current State licensure • Current BCLS Certification Texas Requirements: ARRT (R) (CT) and TDH/TMB Colorado and Rhode Island Requirements: ARRT (R) (CT).