Radiation Physics and Protection — Flashcards

Flashcard 1: Optical Coherence Tomography uses the principle of _____

Answer: near-infrared light interferometry

Flashcard 2: <_____ rads/year is the permissible level of radiation

Answer: 5

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Flashcard 3: we receive _____ rad radiation from an x ray

Answer: 0.2-0.3

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Flashcard 4: wearing _____ decreases dose of x rays by >90%

Answer: lead aprons

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Flashcard 5: _____ rays is the most harmful ionising radiation

Answer: alpha

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Flashcard 6: flouroscopy gives _____ rad radiation

Answer: 4

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Flashcard 7: _____ imaging, is an inversion recovery technique that nulls fat from T2

Answer: STIR

Flashcard 8: SI unit of absorbed radiation is _____ and the common unit is RAD.

Answer: Gray

Flashcard 9: CT head has a radiation exposure of _____ to 150 chest X-ray

Answer: 100

Flashcard 10: The absorbed dose of ionizing radiation _____ very gradually with greater depth and lower speed, suddenly rising to a peak when the proton is ultimately stopped. This is known as Bragg peak.

Answer: increases