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Radiation Safety Exam Questions with Verified Answers
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The technologist chooses to use a grid for an exam. What effect will this have on the patient exposure while ensuring proper image quality? - Answer-increase patient exposure Which of the following projections would result in a young female patient receiving a significantly lower dose to her bre...

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  • October 10, 2024
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  • 2024/2025
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  • radiation safety exam questions with verified answ
  • the technologist chooses to use a grid for an exam

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Radiation Safety Exam Questions with
Verified Answers
The technologist chooses to use a grid for an exam. What effect will this have on the
patient exposure while ensuring proper image quality? - Answer-increase patient
exposure

Which of the following projections would result in a young female patient receiving a
significantly lower dose to her breast tissue during a scoliosis x-ray? - Answer-
Posteroanterior (PA)

What is the most effective and often used material in protective barriers? - Answer-Lead

Which of the following should be avoided if possible when imaging morbidly obese
patients using direct radiography (DR) image receptors? - Answer-The use of full
17x17" radiation field

During fluoroscopy, the Bucky tray is moved to the end of the examination table, leaving
an opening in the side of the table approximately two inches wide at the gonadal level.
This opening must be automatically covered with at least: - Answer-0.25 mm lead
equivalent material

The main purpose of adding filtration to the x-ray tube is to - Answer-decrease patient
dose

Which of the following would provide fluoroscopic imaging personnel with the BEST
radiation protection opportunity? - Answer-Controlling the fluoroscopic system remotely

Federal law on radiation protection requires which two of the following? - Answer-
Signage for radiation areas, maintaining personnel dose records

A shallow dose refers to which of the following? - Answer-Surface dose

For a mobile or portable fluoroscopic equipment (C-arm), inherent provisions must be
made so that the machine cannot be operated at less than: - Answer-12 inches (30 cm)
source-to-skin distance (SSD)

Which of the following beam restriction devices is the most versatile for defining the size
and shape of the radiographic beam? - Answer-Collimator

What is the annual dose equivalent limit for the lens of the eye for occupational
workers? - Answer-150 millisieverts (mSv)

, The National Council for Radiatin Protection and Measurement (NCRP) requires that
leakage radiation from the fluoroscopic tube must be below: - Answer-1 milligray/hour at
1 meter from the tube

A patient in the emergency department requires a mobile chest x-ray. What effort would
BEST reduce radiation exposure to the technologist? - Answer-standing 6 feet from the
x-ray tube during the exposure

What effect will decreasing collimation (larger exposure field) have on the patient's
effective dose when using a fixed technique - Answer-increases patient effective dose

Radiation dose reduction that is a result of using protective shielding is based on which
two of the following? - Answer-Material of the shield, thickness of the shield

Which of the following is the most commonly used beam restricting device? - Answer-
collimator

Increasing diagnostic filtration results in which three of the following? - Answer-
decreased patient dose, decreased contrast, decreased image receptor exposure

Fluoroscopic units display the radiation quantity used for the procedure as: - Answer-air
kerma

According to National Council on Radiation Protection and Measurement (NCRP)
guidelines, a medical x-ray tube must include aluminum equivalent filtration equal to a
minimum of: - Answer-2.5mm

What effect does decreaseing the primary beam field size (increasing collimation) have
on the amount of scatter radiation reaching the image receptor (IR)? - Answer-
decreases amount of scatter radiation reaching the IR

What is the annual dose equivalent limit for a radiographer's hands? - Answer-500
millisieverts (mSv)

Which of the following may alert fluoroscopic x-ray production after a preset period of
time? - Answer-Cumulative timer

Expectant mothers who are technologists should wear a fetal dosimeter at what
location? - Answer-at the waist

What thickness of protective shielding is required in the Bucky slot cover of a
fluoroscopic imaging unit? - Answer-0.25 mm lead equivalent

According to the National Council on Radiation Protection and Measurements (NCRP),
total filtration that is permanently fixed in the useful beam for fluoroscopic equipment

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