Radiation Biology
This type of radiation effect has no threshold and occurs randomly.
What is a stochastic effect?
This agency regulates radioactive materials in the U.S.
What is the NRC?
Annual occupational whole-body dose limit.
What is 50 mSv?
This principle means keeping radiation “as low as reasonably achievable.”
What is ALARA?
Technique change that reduces patient dose.
What is higher kVp and lower mAs?
This type of effect increases in severity with dose and has a threshold.
What is a deterministic effect?
This organization provides radiation protection recommendations.
What is the NCRP?
Annual dose limit for the lens of the eye.
What is 15 mSv?
The three cardinal principles of radiation protection.
What are Time, Distance, and Shielding?
Most common challenge in pediatric imaging.
What is patient motion?
This is the gestational period with the highest fetal radiation sensitivity.
What is 8–15 weeks?
This global organization develops international radiation guidelines.
What is the ICRP?
Annual dose limit for minors.
What is 1 mSv/year?
This law explains why increasing distance reduces exposure.
What is the Inverse Square Law?
Why is routine gonadal shielding discouraged? (Give one reason)
What is it may obscure anatomy / interfere with AEC?
Dose above this level increases risk of severe intellectual disability in utero.
What is 0.4 Sv?
This agency enforces workplace safety and Right-to-Know laws.
What is OSHA?
Dose limit for a declared pregnant worker (total pregnancy).
What is 5 mSv?
Reducing exposure duration applies to which principle?
What is Time?
Name one nonessential radiologic procedure.
What is routine chest x-ray / lumbar spine for employment / whole-body CT screening?
Give one example of a deterministic effect.
What is skin erythema / cataracts / sterility?
This organization evaluates global radiation exposure and risks.
This organization evaluates global radiation exposure and risks.
Formula for cumulative effective dose.
What is Age × 10 mSv?
All organs share this characteristic regarding radiation exposure.
What is all organs are radiosensitive (susceptible to damage)?
Should necessary imaging be postponed due to pregnancy?
What is No?