Radiation Protection and Safety Questions and Answers Flashcards
6 cards from real CAMRT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Radiation Protection and Safety Questions and Answers flashcards as text
What is the concept of justification in radiation protection?
Answer: Every examination benefit must outweigh radiation risk; shared responsibility among physician, radiologist, and technologist
Justification requires net benefit positive. It is a shared responsibility.
What special radiation protection considerations apply for paediatric patients?
Answer: Children are more radiosensitive; optimize technique for smaller body, careful collimation, dose optimization
Children are more radiosensitive with longer post-exposure lifespan, requiring enhanced protection.
What is a diagnostic reference level (DRL)?
Answer: A benchmark that when consistently exceeded triggers protocol optimization investigation
DRLs are investigation benchmarks, not dose limits, set at the 75th percentile of dose distributions.
What is the role of the Radiation Safety Officer in a medical imaging facility?
Answer: Oversees radiation protection program, ensures regulatory compliance, monitors doses, investigates incidents, provides education
The RSO implements and maintains the complete radiation protection program.
During prolonged fluoroscopy, cumulative air kerma reaches 3 Gy. What is the significance?
Answer: Exceeds threshold for deterministic skin effects; patient at risk for radiation skin injury
3 Gy exceeds the threshold for skin injury. The patient must be monitored.
What is the linear no-threshold (LNT) model?
Answer: Any radiation dose carries proportional stochastic risk with no safe threshold; basis of dose limits and ALARA
LNT assumes linear dose-risk relationship with no threshold, forming the basis of protection policy.