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Ch. 11. Radiobiology and Radiation Safety Questions and Answers 2024
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Ch. 11. Radiobiology and Radiation Safety
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Ch. 11. Radiobiology and RadiationSafety
The unit of radiation exposure is the: - answer Roentgen ; Air Kerma (Gy-a)
The amount of x-rays absorbed by the irradiated tissue, or patient, is called the: -
answer Absorbed dose ; RAD (Gy-t)
The absorbed dose in the body based on the type and energy of matter is called the: -
answer Equivalent dose ; REM (Sv)
X-ray photons have a radiation weighting factor of: - answer1 W-r
The measurement units of exposure, absorbed dose, and equivalent dose are: -
answer1. Exposure: Roentgen ; Air Kerma (Gy-a)
2. Absorbed dose: RAD ; Gray(Gy-t)
3. Equivalent dose: REM ; Sievert (Sv)
Convert .10 Gy-a to mGy-a. - answer Multiply Gy x 1,000
(.10 x 1,000 = 100 mGy-a)
In our everyday work, the equivalent dose is used for: - answerTo clarify the absorbed
dose in the body based on the type and energy the person was exposed to.
Describe ESE. - answer Entrance Skin Exposure. Patient dose in radiography is usually
calculated according to the dose level at the skin.
The law of Bergonie-Tribondeau tells us what about radiation exposure? - answer
Name the 4 characteristics of the law of Bergonie-Tribondeau. - answer1. Age
2. Differentiation
3. Metabolic Rate
4. Mitotic Rate
Describe the radiation sensitivity difference between a younger patient's cells and an
older patient's cells. - answerSensitivity is greater in a younger cell.
Describe the radiation sensitivity difference between simple cells and highly complex
cells. - answerSensitivity is greater in a simple cell.
Name several cells in the body that would be sensitive to radiation. - answerBlood cells,
skin cells, thyroid gland, female breast and embryos.
Name several cells in the body that would not be sensitive to radiation. - answerNerve,
Muscle and bone cells.
Name four ways that radiation effects in the body are classified. - answer1. Short-term
2. Long-term
3. Somatic
4. Genetic
Which radiation effect would be seen in about 3 months? - answerShort-term, usually
erythema.
Long-term effects from radiation exposure are often referred to as: - answerRandom?
In diagnostic radiology, we are most concerned about which radiation effect? -
answerLong-term effects
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