X-rays are a form of ionising radiation, to which we are also exposed in everyday life through natural sources such as the environment, soil, rock and food. Our bodies therefore have their own protective and repair mechanisms to rectify any potential cell damage.
Before every examination, we carefully weigh up whether the medical benefit outweighs the potential radiation exposure. Modern equipment automatically adjusts the radiation dose to suit the specific examination and uses only as much radiation as is necessary for a safe and accurate diagnosis.
Our aim is to achieve optimal image quality whilst minimising radiation exposure as much as possible. To put this into perspective, consider the following comparison: a chest X-ray results in a radiation dose of approximately 0.02 mSv¹. A scheduled flight from Zurich to New York results in additional exposure of approximately 0.03 to 0.05 mSv² due to increased cosmic radiation at high altitudes.
Sources:
¹ US Environmental Protection Agency – Frequently Asked Questions: Radiation in Medicine: https://www.epa.gov/radiation/frequent-questions-radiation-medicine
² US Environmental Protection Agency – Cosmic Radiation: https://www.epa.gov/radtown/cosmic-radiation