Answer to Question #11455 Submitted to "Ask the Experts"
The following question was answered by an expert in the appropriate field:
Can you be exposed to radiation if you walk by an x-ray machine or computed tomography (CT) scanner that is not in use? Sometimes the doors are open when the test isn't being performed, and people walk by the open doors. Does that pose any danger at all? Shouldn't the doors be closed at all times so that people walking by are not exposed to radiation?
X-ray machines and CT scanners do not produce radiation except when they are being used to take images.
Although you did not ask about magnetic resonance imaging (MRI) machines, the MRI magnet is always on even if a scan is not being performed. This is why no ferromagnetic material (material attracted by magnetic fields) is allowed in the MRI room at any time.
Kent Lambert, CHP