Position Overview: An Interventional Radiology Technologist (IR Tech) is a specialized radiologic technologist who assists in minimally invasive procedures that use imaging guidance, such as X-rays, CT scans, MRI, or ultrasound, to perform diagnostic and therapeutic interventions. States with voluntary or less restrictive requirements: Some states, such as Arizona and Michigan, may not have strict licensure requirements for radiologic technologists, but professional certification (e.g., ARRT) is often preferred or required by employers.