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CT BOOT CAMP RADIATION SAFETY questions well answered

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  • Course
  • Computered Tomography
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  • Computered Tomography

CT BOOT CAMP RADIATION SAFETY questions well answered

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  • August 9, 2024
  • 30
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Computered Tomography
  • Computered Tomography
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BravelRadon
CT BOOT CAMP RADIATION SAFETY

Which 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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