Q. Are radiology procedures safe?

A. Medical imaging is safe as long as it is done in a way that minimizes radiation exposure. Radiologists are keenly aware that exposure to ionizing radiation should be kept as low as reasonably achievable (the “ALARA” principle) while effectively addressing the clinical question at hand. Risks and benefits must be considered before proceeding with any diagnostic test involving ionizing radiation.

Remember, too, that we are constantly exposed to naturally occurring ionizing radiation on the ground and from the earth’s atmosphere, including radium, radon and cosmic rays. The average annual effective dose from background radiation is estimated at 3.6 millisieverts (mSv). In comparison, screening mammography uses a much smaller radiation dose, 0.6 mSv. Advances in technology continue to lowering the dose used in mammography. However, some diagnostic exams, such as computed tomography (CT) scans, may expose you to a greater amount of radiation.

Other frequently asked questions »