CA Fluoroscopy MCQ – asrt –
102 Questions and Answers
Which unit of measure is the International System of Units (SI) term for dose
equivalent? - -sievert (Sv)
- According to the article, effective dose is probably the most useful way to
express and compare the dose delivered by different imaging procedure
because it: - -takes into account the distribution of dose to the radiosensitive
organs in the body.
- Which of the following conditions is an example of a stochastic radiation
effect? - -leukemia
- Which of the following is not one of the three fundamental principles of
radiation protection? - -15% rule
- X-rays are subject to the inverse square law. What implication does this
law have for radiation protection? - -The amount of radiation a person
receives depends on the distance he or she is from the source.
- The National Council on Radiation Protection and Measurements (NCRP)
requires certain workers to be monitored for occupational radiation
exposure. Which of the following people are included in this requirement?
1. A person who potentially could receive 10% of the maximum annual dose
limit.
2. Operators of mobile x-ray equipment.
3. Any person who occasionally works in a building with a designated "high
radiation area." - -1. & 2.
- According to NRCP Report No. 116, the annual effective dose limit for
occupationally exposed individuals is _____ mSv ( _____ rem). - -50 (5)
- Which of the following fluoroscopy techniques are consistent with the as
low as reasonably achievable (ALARA) principle in lowering radiation doses to
patients?
1. using magnification mode.
2. using the last image-hold feature.
3. using intermittent fluoroscopy. - -2 and 3
- According to the article, in a court of law, "care not documented is care not
done." Which of the following items should be documented to maintain legal
standards of care?
, 1. radiation dose
2. contrast media and IV medication administration
3. fluoroscopy time - -1. 2. 3.
- What is the most commonly used shielding material found in x-ray rooms?
- -lead
- What is the half-value layer? - -a term that describes the efficiency of a
radiation-absorbing material
- In additon to reducing patient dose, what is another benefit of collimators?
- -decreased image noise from scatter radiation
- Tube current (mA) controls the quantity of the x-rays produced per unit of
time. If the mA is doubled, then dose to the patient and staff is ___. - -
doubled
- Which of the following is the most commonly used beam-limiting device? -
-collimator
- Which of the following radiation protection methods limits unnecessary
exposure by reducing the number of photons in the x-ray beam? - -filtration
- Although lead aprons do not prevent all x-rays from reaching the wearer,
they reduce radiation exposure by_____ %. - -80
- Which of the following positioning methods may reduce patient radiation
dose?
1. Rotate the patient so the gonads are away from the primary beam.
2. Place the patient on the table, slightly off center.
3. Position the patient so that radiosensitive areas receive the exit dose. - -
1. & 3.
- During fluoroscopy, the tableside operator receives the highest
occupational radiation dose, with the highest levels directed at the waist. - -
True
- The Joint Commission requires a medical physicist to establish patient
doses for commonly performed examinations by each radiographic unit. The
dose delivered during fluoroscopy should be limited to _____ Gy ( _____ rad)
per minute under normal circumstances. - -0.1 (10)
- In fluoroscopy, high kilovolt peak (kVp) and low mA technical factors are
preferred techniques to lower patient and radiology staff dose. The 15% rule
states that increasing the kVp by 15% decreases the mAs by _____ %. - -50
102 Questions and Answers
Which unit of measure is the International System of Units (SI) term for dose
equivalent? - -sievert (Sv)
- According to the article, effective dose is probably the most useful way to
express and compare the dose delivered by different imaging procedure
because it: - -takes into account the distribution of dose to the radiosensitive
organs in the body.
- Which of the following conditions is an example of a stochastic radiation
effect? - -leukemia
- Which of the following is not one of the three fundamental principles of
radiation protection? - -15% rule
- X-rays are subject to the inverse square law. What implication does this
law have for radiation protection? - -The amount of radiation a person
receives depends on the distance he or she is from the source.
- The National Council on Radiation Protection and Measurements (NCRP)
requires certain workers to be monitored for occupational radiation
exposure. Which of the following people are included in this requirement?
1. A person who potentially could receive 10% of the maximum annual dose
limit.
2. Operators of mobile x-ray equipment.
3. Any person who occasionally works in a building with a designated "high
radiation area." - -1. & 2.
- According to NRCP Report No. 116, the annual effective dose limit for
occupationally exposed individuals is _____ mSv ( _____ rem). - -50 (5)
- Which of the following fluoroscopy techniques are consistent with the as
low as reasonably achievable (ALARA) principle in lowering radiation doses to
patients?
1. using magnification mode.
2. using the last image-hold feature.
3. using intermittent fluoroscopy. - -2 and 3
- According to the article, in a court of law, "care not documented is care not
done." Which of the following items should be documented to maintain legal
standards of care?
, 1. radiation dose
2. contrast media and IV medication administration
3. fluoroscopy time - -1. 2. 3.
- What is the most commonly used shielding material found in x-ray rooms?
- -lead
- What is the half-value layer? - -a term that describes the efficiency of a
radiation-absorbing material
- In additon to reducing patient dose, what is another benefit of collimators?
- -decreased image noise from scatter radiation
- Tube current (mA) controls the quantity of the x-rays produced per unit of
time. If the mA is doubled, then dose to the patient and staff is ___. - -
doubled
- Which of the following is the most commonly used beam-limiting device? -
-collimator
- Which of the following radiation protection methods limits unnecessary
exposure by reducing the number of photons in the x-ray beam? - -filtration
- Although lead aprons do not prevent all x-rays from reaching the wearer,
they reduce radiation exposure by_____ %. - -80
- Which of the following positioning methods may reduce patient radiation
dose?
1. Rotate the patient so the gonads are away from the primary beam.
2. Place the patient on the table, slightly off center.
3. Position the patient so that radiosensitive areas receive the exit dose. - -
1. & 3.
- During fluoroscopy, the tableside operator receives the highest
occupational radiation dose, with the highest levels directed at the waist. - -
True
- The Joint Commission requires a medical physicist to establish patient
doses for commonly performed examinations by each radiographic unit. The
dose delivered during fluoroscopy should be limited to _____ Gy ( _____ rad)
per minute under normal circumstances. - -0.1 (10)
- In fluoroscopy, high kilovolt peak (kVp) and low mA technical factors are
preferred techniques to lower patient and radiology staff dose. The 15% rule
states that increasing the kVp by 15% decreases the mAs by _____ %. - -50
