Which of these radiation interactions DO NOT result in ionization of an atom?
A. Coherent scattering
B. Photoelectric Absorption
C. Compton Scattering correct answers A. Coherent scattering
The energy of ions created in air from x-rays is called:
A. Exposure
B. Air Kerma
C. Absorbed dose
...
CT BOOT CAMP RADIATION SAFETY || QUESTIONS
AND ANSWERS 100% VERIFIED!!
Which of these radiation interactions DO NOT result in ionization of an atom?
A. Coherent scattering
B. Photoelectric Absorption
C. Compton Scattering correct answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers A. Skin erythema
B. Epilation
D. Miscarriage
During a CT procedure, attenuation of the x-ray beam may be caused by which three of the
following?
A. Coherent scattering
B. Bremsstrahlung radiation
C. Compton scattering
D. Photoelectric absorption
E. Characteristic radiation correct answers A. Coherent scattering
C. Compton scattering
, D. Photoelectric absorption
Concerning radiation-induced cancer, increasing the radiation does to a patient results in:
A. Increased severity of cancer
B. Decreased severity of cancer
C. Increase probability of cancer
D. Decreases probability of cancer correct answers C. Increase probability of cancer
Which of these radiation measurements describe the joules of energy deposited in the patient
from ionizing radiation?
A. Exposure
B. Air Kerma
C. Absorbed dose
D. Equivalent dose
E. Effective dose correct answers C. Absorbed dose
Which two of the following interactions may result in an x-ray photon being emitted out of
the patient in a different direction than the original path?
A. Coherent scattering
B. Photoelectric absorption
C. Compton Scattering correct answers A. Coherent scattering
C. Compton Scattering
What term describes radiation-induced hair loss?
A. Oligospermia
B. Urticaria
C. Erythema
D. Epilation correct answers D. Epilation
Radiation exposure is calculated with units of:
A. Joules/Kilogram (J/kg)
B. Coulombs/kilogram (C/kg)
C Milligray (mGy)
D. Millisievert (mSv) correct answers B. Coulombs/kilogram (C/kg)
Increasing the kilovoltage peak (kVp) for a CT procedure results in:
A. Increased attenuation
B. Decreased attenuation
C. No change in attenuation correct answers B. Decreased attenuation
Effective dose is measured with units of:
A. Coulombs/kilogram (C/kg)
B. Milligray (mGy)
C. Millisievert (mSv)
D. Becquerel (Bq) correct answers C. Millisievert (mSv)
Region of interest (ROI) measurements throughout a single CT image produced the following
CT number readings. Which area demonstrates the highest level of attenuation?
A. ROI= -67HU
B. ROI= -323HU
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