Interventional radiology provides minimally invasive image-guided diagnosis and treatment of diseases using catheters and medical imaging. Procedures include angioplasty to unblock arteries, biopsies, draining fluid collections, treating tumors and more. Interventional radiology was pioneered by Charles Dotter in the 1960s and uses imaging techniques like fluoroscopy and angiography to guide procedures. Common procedures include angiography, angioplasty, embolization, stent placement, drainage and biopsy to diagnose and treat conditions.