Radiation Measurement Units — Flashcards

Flashcard 1: Alpha and beta rays are _____ type of ionizing radiation

Answer: particulate

Flashcard 2: Re-186 is a beta emitter that also emits _____ radiation.

Answer: Gamma radiation (in addition to beta)

Extra: Re-186 is used for bone pain palliation and radiosynovectomy. Unlike "pure" beta emitters like Strontium-89 or Phosphorus-32, Re-186 emits gamma rays (137 keV) which allow for scintigraphic imaging of the tracer distribution.

Flashcard 3: What is the SI unit for radiation exposure?

Answer: Coulomb/kg

Flashcard 4: Cobalt 60 emits _____ particles and gamma radiation.

Answer: beta

Flashcard 5: Gamma and X-rays are _____ type of ionizing radiation

Answer: electromagnetic

Flashcard 6: _____ rays have the maximum tissue penetrating ability.

Answer: Gamma

Flashcard 7: Optical Coherence Tomography uses the principle of _____

Answer: near-infrared light interferometry

Flashcard 8: <_____ rads/year is the permissible level of radiation

Answer: 5

Extra: 

Flashcard 9: wearing _____ decreases dose of x rays by >90%

Answer: lead aprons

Extra: 

Flashcard 10: The average annual radiation dose received by an individual from all sources (natural + medical) is _____ rad.

Answer: 0.2-0.3

Extra: Natural background radiation accounts for ~0.1-0.2 rad/year, while medical exposures (diagnostic X-rays, etc.) contribute additional dose, totaling an average of approximately 0.2-0.3 rad per year for an individual.