A team of researchers from the US National Cancer Institute and Columbia University found that the average range of radiation exposure from getting a coronary calcium scan after every five years would cause 42% additional cases of cancer among 100,000 men and 62 additional cases among 100,000 women. The US Preventive Services Task Force recommends against using CT scans in screening programs, and the American Heart Association says they should be used for “selected individuals” at intermediate risk.