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Computed Radiography Concepts and Techniques

Computed Radiography Concepts and Techniques

Assessment

Interactive Video

Physics

11th - 12th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explores the transition from screen film radiography to digital radiography, focusing on computed radiography. It explains the process of creating a digital radiograph, the role of cassettes, and the formation of latent images. The tutorial details the conversion of analog signals to digital, the use of europium-doped barium fluoro bromide crystals, and the readout process using red laser light. It highlights the differences between fluorescence and phosphorescence and concludes with a comparison of computed and digital radiography systems.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary distinction between computed radiography and digital radiography systems?

Computed radiography uses a cassette, while digital radiography does not.

Digital radiography uses film, while computed radiography does not.

Computed radiography is faster than digital radiography.

Digital radiography requires manual processing, while computed radiography does not.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What material is used in the computed radiography cassette to create a latent image?

Calcium tungstate crystals

Barium fluoro bromide crystals

Lead oxide crystals

Silver halide crystals

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of europium in the computed radiography process?

It enhances the brightness of the image.

It acts as a catalyst for image processing.

It stabilizes the cassette structure.

It disrupts the crystal structure to form F centers.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the latent image in computed radiography converted into a digital image?

By exposing the cassette to ultraviolet light

By applying heat to the cassette

By using a blue laser light

By shining red laser light onto the cassette

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for the delayed conversion of x-ray energy to light in computed radiography?

Bioluminescence

Fluorescence

Incandescence

Phosphorescence

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of the photo multiplier in the computed radiography readout process?

It converts x-rays directly into digital signals.

It multiplies the blue light signal for conversion.

It filters out unwanted red light.

It stores the digital image temporarily.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to clear the cassette before taking another radiograph?

To enhance the image quality

To avoid a superimposed image

To prevent damage to the cassette

To reduce the exposure time

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