When using digital fluoroscopy systems, making use of the last image hold feature can

be an effective dose reduction technique.

What is the purpose of radiographic beam filtration?

To reduce exposure to the patient’s skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam

In the event that a pregnant patient is inadvertently irradiated

the radiation safety officer or the medical physicist should perform the calculations necessary to determine fetal dose.

Reducing the field size to the anatomic features of interest not only reduces patient exposure but also

increases completed image quality by decreasing scatter.

Because multiple bony areas span the entire body, the radiation dose absorbed by the organ called bone marrow

cannot be measured by a direct method; it can only be estimated.

Which of the following must always be the first step in protection of the reproductive organs?

Adequate and precise collimation of the radiographic beam to include only the anatomy of interest

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Question	Answer
Total filtration of _______________________ for fixed x-ray units operating above 70 kVp is the regulatory standard.	2.5-mm aluminum equivalent
In standard image intensification fluoroscopy, an x-ray beam half-value-layer (HVL) of 3 to 4.5 mm aluminum is considered acceptable when kVp ranges from	80 to 100.
When using digital fluoroscopy systems, making use of the last image hold feature can	be an effective dose reduction technique.
What is the purpose of radiographic beam filtration?	To reduce exposure to the patient’s skin and superficial tissues by absorbing most of the lower-energy photons from the heterogeneous beam
When generator settings are changed from one mA and time combination to another, the most that linearity can vary is	10%.
In the event that a pregnant patient is inadvertently irradiated	the radiation safety officer or the medical physicist should perform the calculations necessary to determine fetal dose.
Reducing the field size to the anatomic features of interest not only reduces patient exposure but also	increases completed image quality by decreasing scatter.
Because multiple bony areas span the entire body, the radiation dose absorbed by the organ called bone marrow	cannot be measured by a direct method; it can only be estimated.
Which of the following must always be the first step in protection of the reproductive organs?	Adequate and precise collimation of the radiographic beam to include only the anatomy of interest
A blotchy radiographic image that results when an insufficient quantity of x-ray photons reaches the image receptor is called	quantum noise, or mottle.
Scattered radiation to the lens of the eyes of diagnostic imaging personnel can be substantially reduced by the use of protective eyeglasses fitted with optically clear lenses that contain a minimal lead equivalent protection level of	0.35 mm.
For primary radiation, what is the term that represents a portion of beam-on time that the x-ray beam is directed at a primary barrier during the week?	Use factor
Who should determine the exact shielding requirements for a particular imaging facility?	Medical physicist
When the time spent in a higher radiation area is reduced or limited, occupational exposure	is also reduced.
The maximum weekly permitted equivalent dose for a controlled area must not exceed	1 mSv.

Created by: JacobNiccoli

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