Information for patients about radiation doses:

https://www.radiologyinfo.org/en/info.cfm?pg=safety-xray

X-ray Risk Calculator:

http://www.xrayrisk.com/calculator/calculator.php

RADAR Patient Exposure Radiation Dose Calculator:

http://www.doseinfo-radar.com/ExposureCalculator.html

RADAR Medical Procedure Radiation Dose Calculator and Consent Language Generator:

http://www.doseinfo-radar.com/RADARDoseRiskCalc.html

Image Gently/Image Wisely:

https://www.imagewisely.org/

Health Physics Society (public information about radiation risks):

http://hps.org/publicinformation/