New MRI study aims to sharpen heart imaging and check for gadolinium traces

This study aims to develop better MRI methods for imaging the heart and brain, and to describe heart diseases using these new techniques. It will also investigate whether gadolinium, a common MRI contrast agent, stays in the body long after use. Up to 5,000 healthy volunteers and people with known or suspected heart disease, ages 7 and older, will participate. The study involves MRI scans, possible blood draws, and heart monitoring, but does not test a new treatment.