Imaging & Interventional Radiology is a medical sub-specialty of radiology which utilizes minimally-invasive image-guided procedures to diagnose and treat diseases in nearly every organ system. The concept behind interventional radiology is to diagnose and treat patients using the least invasive techniques currently available in order to minimize risk to the patient and improve health outcomes. Using X-rays, CT, MRI, Ultrasound, and other imaging modalities, interventional radiologists obtain images which are then used to direct interventional instruments throughout the body.