According to some Columbia University researchers, doctors are overusing CT scans in diagnosing patients. The overuse can lead to a higher incidence of cancer due to the radiation exposure. The study, published in the New England Journal of Medicine, states that the risk is greatest for children. According to the report 2% of all cancers can be linked to exposure to CT scan radiation. The study notes that in most cases, old fashioned x-rays and ultrasound technology work just as well without adding the risk of radiation from a tomography CT scan. One has to wonder why doctors are pushing the CT scans in favor of the older, less dangerous methods. Hopefully, doctors are not succumbing to slick, aggressive sales pitches from those hawking the CT scans.