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Transmission Imaging in Radiography

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Questions and Answers

What is the primary function of the grid in grid radiography?

To absorb primary radiation
To reduce the transmission of scattered x-rays (correct)
To scatter x-ray photons in all directions
To amplify the intensity of x-ray photons

Why do obliquely angled photons have a higher probability of striking the grid septa?

Because they have a higher energy than primary radiation
Because they have a shorter path length through the patient
Because they are scattered in multiple directions (correct)
Because they have a lower intensity than primary radiation

What is the result of reducing the transmission of scattered x-rays in grid radiography?

Increased radiation dose penalty
Improved image contrast (correct)
Increased primary transmission
Reduced x-ray intensity at the detector

What is the benefit of high primary transmission in grid radiography?

Reduced radiation dose to the patient (C) Signup and view all the answers

What is the purpose of aligning the grid with the x-ray beam in grid radiography?

To align the grid septa with the x-ray beam direction (B) Signup and view all the answers

What is the maximum primary transmission of the grid?

73% (D) Signup and view all the answers

What is the effect of the interspace material on the primary transmission of the grid?

It decreases the transmission (C) Signup and view all the answers

What is the consequence of a lower primary transmission in grid radiography?

A higher radiation dose penalty (C) Signup and view all the answers

What is the relationship between scatter transmission and primary transmission in grid radiography?

Scatter transmission is inversely proportional to primary transmission (D) Signup and view all the answers

What is the purpose of the grid in radiography?

To reduce the scatter transmission and increase the primary transmission (C) Signup and view all the answers

What is the primary result of x-rays passing through each point in the patient in transmission imaging?

Combination of absorption of all structures along each ray path (A) Signup and view all the answers

What is the main purpose of transmission imaging in grid radiography?

To reduce scatter radiation and increase contrast (C) Signup and view all the answers

What happens to the x-rays as they pass through each point in the patient in transmission imaging?

They are absorbed by all structures along each ray path (C) Signup and view all the answers

What is the result of the absorption of all structures along each ray path in transmission imaging?

Primary beam intensity at that location on the image receptor (B) Signup and view all the answers

What is the primary beam intensity affected by in transmission imaging?

Absorption of all structures along each ray path (B) Signup and view all the answers

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