Radiation Detectors — Flashcards

Flashcard 1: _____ is used to monitor radiation dose in India

Answer: TLD badge (Thermoluminescent dosimeter)

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: SI unit of absorbed radiation is _____ and the common unit is RAD.

Answer: Gray

Flashcard 4: What is the SI unit for radiation exposure?

Answer: Coulomb/kg

Flashcard 5: P32 is a pure _____ emitter

Answer: beta (radiation)

Flashcard 6: Optical Coherence Tomography uses the principle of _____

Answer: near-infrared light interferometry

Flashcard 7: <_____ rads/year is the permissible level of radiation

Answer: 5

Extra: 

Flashcard 8: wearing _____ decreases dose of x rays by >90%

Answer: lead aprons

Extra: 

Flashcard 9: 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.

Flashcard 10: _____ rays is the most harmful ionising radiation

Answer: alpha

Extra: