Which of the following are tools that the radiographer can use to limit scatter radiation? _____ Only radiographic grids None of the above Only beam-restricting devices Beam-restricting devices and radiographic grids

Beam-restricting devices and radiographic grids

What purpose does positive beam limitation serve? It is used to _____ reduce patient exposure by limiting the exposure field to the same size as the image receptor in the Bucky tray maintain constant exposure regardless of field size automatically adjust the exposure time increase patient exposure by enlarging the exposure field

reduce patient exposure by limiting the exposure field to the same size as the image receptor in the Bucky tray

Exposure chapter 7 Practice Questions

Flashcard

Learn Mode

Match

Library

Create

Flashcards

Library

Match (Coming Soon)

Medicine - Radiology

user_jevbwl Created by 9 mon ago

Cards in this deck(61)

Which of the following are tools that the radiographer can use to limit scatter radiation? _____

The larger the x-ray beam field size, the _____ the amount of scatter radiation produced.

What purpose does positive beam limitation serve? It is used to _____

Which of the following beam-restricting devices is best at limiting unsharpness surrounding the radiographic image? _____

The unrestricted primary beam produces a(n) _____ area of exposure.

Decreasing collimation results in _____

As beam restriction increases, field size and patient dose _____

As beam restriction increases, the quantity of scatter radiation _____ and radiographic contrast _____

Which beam restriction device can be cut to the size needed? _____

Which of the following beam-restricting devices is least effective at limiting unsharpness surrounding the radiographic image? _____

An aperture diaphragm with an attached elongated tube is a(n): _____

A beam-restricting device that has two or three sets of lead shutters is a _____

The purpose of the mirror inside the collimator is to _____

When using a digital flat-panel detector, the radiographer must _____

A device consisting of very thin lead strips with radiolucent interspaces intended to absorb scatter radiation emitted from the patient is a _____

Which of the following is NOT a way to reduce the production of scatter radiation? _____

Which of the following influences the amount of scatter radiation striking the IR but not the production of scatter radiation? _____

The height of the lead strips relative to the distance between the lead strips is the measure of _____

T/F: If the height of the lead strips increases and the space between the grid strips decreases, the grid will be more effective at scatter removal. _____

T/F: If the height of the lead strips decreases and the space between the grid strips increases, the grid will be more effective at scatter removal. _____

T/F: A high grid ratio removes little scatter. _____

T/F: A grid decreases scatter production. _____

The number of lead strips per inch in a grid is a measure of _____

Due to increased potential grid cutoff, which would be the most challenging grid to use? _____

What is the result of imaging a thicker part/patient? _____

If the height of the grid strip is 16mm, the distance between the strips is 2mm, and the strip is 0.3 mm thick, what is the grid ratio? _____

What are the applications of which in relation to grids and that? Common applications include _____

T/F: A low ratio grid is more effective at removing scatter than high. _____

T/F: As grid ratio increases, the removal of scatter increases. _____

T/F: High ratio grids are less effective at removing scatter than low ratio grids? _____

The amount of mAs required with a grid divided by the amount of mAs needed without a grid is the calculation that determines the _____

Which grid design is manufactured to match the divergence of the x-ray beam? _____

What is the grid conversion factor for a 12:1 ratio grid? _____

What occurs when the x-ray beam is not properly aligned with the grid strips? _____

In general, when should a grid be used? _____

When a grid is needed but not available, the _____ may be used for certain examinations.

What type of grid error results in appropriate exposure to the middle of the IR and marked underexposure along the sides of the IR? _____

What is found between the lead strips in a grid? _____

If an excellent knee radiograph is produced using 10 mAs and an 8:1 ratio grid, how much mAs will be needed if no grid is available? _____

An optimal AP abdomen radiograph can be produced using 40 mAs, 75 kVp, and a 12:1 grid. How much mAs would be needed if the only grid available is a 6:1 ratio grid? _____

Also called lateral decentering, the _____ grid error results when the central ray is not aligned to the middle of a focused grid.

Changing from an 8:1 grid to a 12:1 grid, along with making the appropriate adjustments, will result in _____

Grid frequencies can range from _____

Grid ratio can be expressed mathematically as _____

Grid ratios range from _____

Decreasing grid ratio (with no change in frequency) results in _____ scatter cleanup and _____ lead content.

The recommended SIDs that can be used with a focused grid describes the _____

Grids that move during the exposure are _____

A grid whose lead strips run perpendicular to the long axis of the grid is called a(n): _____

Patient dose increases when _____

The most common cause of grid cutoff is due to _____

The only type of grid cutoff that occurs with both focused and parallel grids is due to _____

The smaller the volume of tissue irradiated, the _____

Significant collimation requires an increase of _____ of the mAs.

Why does the air-gap technique work? _____

T/F: Digital IRs are less sensitive to scatter radiation than are film-screen IRs. _____

T/F: Grids do not reduce scatter production. _____

T/F: Increasing collimation results in reduced patient exposure, increased field size, and decreased scatter production. _____

T/F: As collimation decreases, exposure to the IR increases. _____

T/F: An adult's knee measuring 14 cm should be radiographed without a grid. _____

T/F: The only reason a grid should be used is to increase radiographic contrast. _____

Ask Our AI Tutor

Get Instant Help with Your Questions

Need help understanding a concept or solving a problem? Type your question below, and our AI tutor will provide a personalized answer in real-time!

How it works

Ask any academic question, and our AI tutor will respond instantly with explanations, solutions, or examples.

Get Started

Browse questions and discover topic-based flashcards
Practice with engaging flashcards designed for each subject
Strengthen memory with concise, effective learning tools

Discover By Topic

Exposure chapter 7 Practice Questions

Related Decks