If you’ve received an X-ray for a foot injury, or had a CT scan to check the cause of repeated headaches, you may wonder if the radiation given off by these tests is harmful to you. Some types of imaging tests, such as ultrasound and MRI exams, do not expose you to damaging radiation. Other tests, such as X-rays, CT (or CAT) scans and nuclear scans, do expose you to ionizing radiation. Although the risk of getting cancer from this radiation is extremely low, you still want to have these tests only when they are medically necessary.
As part of the radiology management initiative within the Physician Group Incentive Program, we are working to promote awareness of radiation exposure and appropriate imaging. Leading organizations, such as the American College of Radiology, create guidelines to help physicians decide when and when not to perform radiology exams. Doctors weigh the benefits and the risks when they are ordering these tests for their patients.
Radiation exposure amounts vary by the type of exam and the body part being scanned. Exposure can even be different for the same test done on different machines.
Helpful sites with additional information include http://radiologyinfo.org/ for patients and imagewisely.org for health care professionals.


