Grid Frequencies in Radiography Quiz & Flashcards

What is the purpose of a grid in radiography?

What is a grid ratio?

What is the range of grid frequency?

What is the term used to describe grids with lead strips aligned in the direction of the diverging primary x-ray beam?

What is the term used to describe the range of distances within which the grid will not absorb an undue amount of useful radiation?

What is the purpose of interspacing material in a grid?

What is the most commonly used SID in radiography?

What is the range of focal range for grids with extra-long focal ranges?

Grids in Radiography

A grid is a device placed under the table between the patient and the IR to absorb scatter radiation.
Grids are constructed of tiny lead strips held in place by a radiolucent interspacing material.
The effectiveness of a grid is determined by the grid ratio, which ranges from 5:1 to 16:1.
The grid ratio determines how much variation in the direction of the incoming photon is allowed without the photon being absorbed by the grid.
Grids with the same ratio may have many strips close together or fewer strips farther apart, which is called the grid frequency.
Grid frequencies range from 60 to 196 lines/inch.
Grids for general-purpose use are called focused grids because the lead strips are aligned in the direction of the diverging primary x-ray beam.
The lead strips of a focused grid are precisely aligned with the x-ray beam at a specific source-image receptor distance (SID), which is called the grid radius.
The range of distances within which the grid will not absorb an undue amount of useful radiation is referred to as the focal range of the grid.
The SID used with a grid should always be within the grid’s focal range.
The most commonly used SIDs are 40, 48, and 72 inches, and each usually requires a different grid with a suitable focal range.
Grids with extra-long focal ranges are now available, some of which have a focal range of 40 to 72 inches.

Test your knowledge on grids in radiography with this informative quiz! Learn about the construction and effectiveness of grids, the importance of grid ratio and frequency, and the concept of focal range. Find out about the different types of grids and the suitable source-image receptor distances for each, as well as the latest advancements in grid technology. Don't miss this opportunity to enhance your understanding of grids in radiography and improve your professional skills!