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CT BOOT CAMP RADIATION SAFETY questions well answered
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CT BOOT CAMP RADIATION SAFETYWhich of these radiation interactions DO NOT result in ionization of an atom?
A. Coherent scattering
B. Photoelectric Absorption
C. Compton Scattering - correct answer ✔✔A. Coherent scattering
The energy of ions created in air from x-rays is called:
A. Exposure
B. Air Kerma
C. Absorbed dose
D. Equivalent dose
E. Effective dose - correct answer ✔✔B. Air Kerma
For deterministic effects of radiation, increasing dose results in:
A. increased severity of the effect
B. Decreased severity of the effect
C. Increase probability of the effect
D. Decrease probability of the effect - correct answer ✔✔A. increased severity of the effect
Consider this scenario: A medical physicist is scanning a CT phantom with several materials, each having
a different atomic number. Which material will cause the least amount of attenuation?
A. Atomic number = 6
B. Atomic number = 19
C. Atomic number = 53
D. Atomic number = 56 - correct answer ✔✔A. Atomic number = 6
Scanning an area of increased tissue density will result in:
,A. increased x-ray attenuation
B. Decreased x-ray attenuation
C. No change in x-ray attenuation - correct answer ✔✔A. increased x-ray attenuation
Which of the following dose quantities is most useful for projecting the risk of radiation-induced cancer?
A. Exposure
B. Air Kerma
C. Absorbed dose
D. Equivalent dose
E. Effective dose - correct answer ✔✔E. Effective dose
Which of the following materials results in the highest number of photon interactions?
A. Air
B. Fat
C. Muscle
D. Metal - correct answer ✔✔D. Metal
The number of ionization events in air is described as:
A. Exposure
B. Air Kerma
C. Absorbed dose
D. Equivalent dose
E. Effective dose - correct answer ✔✔A. Exposure
An increased patient size has what of the following effects on x-ray attenuation?
A. Increased attenuation
B. Decreased attenuation
C. No change in attenuation - correct answer ✔✔A. Increased attenuation
, Consider this scenario: During a CT scan of the chest, the technologist administers a radiation dose of
approximately 3,000 milligray (mGy). Which two of the following effects may occur?
A. Cataracts
B. Epilation
C. Cancer
D. Decreased fertility - correct answer ✔✔B. Epilation
C. Cancer
Air Kerma is measured in units of:
A. Coulombs/kilogram (C/kg)
B. Milligray (mGy)
C. Millisievert (mSv)
D. Becquerel (Bq) - correct answer ✔✔B. Milligray (mGy)
Which tow of the following radiation effects only occur at a specific dose threshold?
A. Cataracts
B. Bronchogenic carcinoma
C. Leukemia
D. Skin Erythema - correct answer ✔✔A. Cataracts
D. Skin Erythema
Deterministic effects of radiation exposure include which three of the following?
A. Skin erythema
B. Epilation
C. Cancer
D. Miscarriage
E. Heritable (gen - correct answer ✔✔A. Skin erythema
B. Epilation
D. Miscarriage
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