Damilakis.
Frequency of exposure clearly increases the total amount of ionizing radiation received, he added, so flight attendants and pilots could receive as much as a 300 millisievert (or 300,000 microsievert) of ionizing radiation from airport security scans each year.
Frequent flyers who average more than 200 flights a year may also be exposed to as much as 200 microsievert of radiation.
Dr. Damilakis discussed the safety of airport security scans here at the European Congress of Radiology (ECR) 2013.