X-Ray Grids and Collimators Quiz

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Questions and Answers

Who invented the radiographic grid?

Dr. Alexander Scattering in 1905
Dr. William X-ray in 1920
Dr. Gustave Bucky in 1913 (correct)
Dr. Emily Radiography in 1915

What is the purpose of a radiographic grid?

To scatter radiation in multiple directions
To remove scattered radiation and increase image contrast (correct)
To create a background fog in the film image
To absorb primary radiation and decrease image contrast

Why are patient exposures higher with aluminum interspace grids?

Because aluminum absorbs more primary radiation (correct)
Because aluminum decreases image noise
Because aluminum scatters more radiation
Because aluminum increases image contrast

What material are the interspaces of the grid typically made of?

Aluminum or other organic compounds (B) Signup and view all the answers

What does scatter radiation contribute to the film image?

A constant background fog and increased noise (A) Signup and view all the answers

What are the two ways of obtaining a digital x-ray?

<ol> <li>Computed radiography 2. Direct/indirect digital radiography</li> </ol> Signup and view all the answers

What is the process of computed radiography?

Capturing radiographic data from a conventional x-ray machine and processing the data digitally to produce a crisp and high-quality image Signup and view all the answers

What is the imaging plate made of in computed radiography?

A screen using a photostimulabe phosphor Signup and view all the answers

What is the special property of photostimulable phosphor in computed radiography?

Storing X-ray energy in the latent form and releasing the same when stimulated by a laser energy in the CR reader/digitizer Signup and view all the answers

What is unique about storage phosphor in computed radiography?

They respond to a wide range of X-ray exposures regardless of the exposure, and the image can be displayed correctly Signup and view all the answers

Study Notes

Radiographic Grid

Invented by Dr. Gustave Bucky
Purpose: to absorb scattered radiation and improve image contrast and resolution

Radiographic Grid Characteristics

Patient exposures are higher with aluminum interspace grids due to increased absorption of radiation

Grid Interspaces

Typically made of aluminum or fiber materials

Scatter Radiation

Contributes to image degradation and loss of contrast on the film image

Digital X-ray

Two ways to obtain:
- Computed radiography (CR)
- Digital radiography (DR)

Computed Radiography (CR)

Process: x-ray exposed imaging plate is scanned by a laser, and the stored latent image is read out

Imaging Plate

Made of photostimulable phosphor (PSP)
Storage phosphor has the unique property of being able to store a latent image until stimulated by a laser

Photostimulable Phosphor (PSP)

Special property: emits light when stimulated by a laser, which is then measured to form a digital image

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Description

Test your knowledge about X-ray grids and collimators with this quiz. Learn about how grids are used to remove scattered radiation and increase image contrast in X-ray imaging.