Congenital heart disease is the most common birth defect, affecting an estimated one million children living in the U.S. Children with CAHD often have complex diseases and many require life-long medical care. As part of their care, they often require cardiac imaging procedures that use ionizing radiation. While these imaging procedures are critical for accurate diagnosis and intervention, ionizing radiation in high doses can be harmful. Newly released recommendations for pediatric radiation safety have now been released by experts.