In a first-of-its-kind procedure, Boston doctors used X-ray imaging with GPS-like technology to repair a damaged heart.

WBZ-TV in Boston reported that doctors at Mass General Hospital used a new system called Mediguide to guide a catheter up through the leg and into the heart to repair the damaged tissue.

Typically, surgery to treat Atrial Fibrillation, an irregular heartbeat that can cause fatigue, shortness of breath, and decreased stamina, would involve exposing patients to constant X-rays, allowing for radiation exposure and that can lead to cancer.

The new technology has cut the use of X-rays by as much as 90 percent, said Dr. Moussa Mansour. “The hope is, with this new system, we will be able to get the benefit of imaging with minimum risk of radiation exposure,” Mansour told the station.