SIR Foundation is a scientific foundation dedicated to fostering research and education in interventional radiology for the purposes of advancing scientific knowledge, increasing the number of skilled investigators in interventional radiology and developing innovative therapies that lead to improved patient care and quality of life. Interventional radiologists are vascular experts who invented angioplasty and the catheter-delivered stent, which were first used in the legs to treat peripheral arterial disease. They provide vascular disease management and specialize in minimally invasive treatments.