Chapter 18 1113 Review Grids

What is the difference between parallel and focused grids?

• Parallel grids have lead strips that are angled, while focused grids have lead strips that are parallel to each other

• Parallel grids have lead strips that are parallel to each other, while focused grids have lead strips that are angled to match the divergence of the x-ray beam

• Parallel grids are used in stationary radiography, while focused grids are used in fluoroscopy

• Parallel grids are used for high-resolution imaging, while focused grids are used for high-contrast imaging

Tags

NGSS.HS-PS4-5

What is one difference that may occur when using a stationary grid versus a moving grid?

• A stationary grid is used for dynamic imaging, while a moving grid is used for static imaging

• A stationary grid is used for portable radiography, while a moving grid is used for stationary radiography

• A stationary grid can cause grid lines on the image, while a moving grid blurs out these lines

• A stationary grid increases radiation dose, while a moving grid decreases it

Why is the process of grid selection important for specific radiographic procedures?

• It determines the color of the radiographic image

• It affects the patient's comfort during the procedure

• It influences the contrast and clarity of the radiographic image

• It changes the size of the area being imaged

What must be calculated to compensate for changes in grid selection?

• Changes in patient positioning

• Changes in room temperature

• Changes in technical factors

• Changes in the time of exposure

Of the following, which is a purpose of a grid?

• To decrease the radiographic contrast in the image

• To improve the radiographic contrast in the image

• To increase the amount of scatter radiation reaching the image receptor

• To serve as a primary source of scatter radiation

What does the grid do to scattered radiation?

• Amplifies scattered radiation

• Reflects scattered radiation back to the patient

• Absorbs scattered radiation before it reaches the image receptor

• Has no effect on scattered radiation

What is the primary source of scatter radiation?

• The radiographic equipment

• The grid

• The image receptor

• The patient

Does scatter radiation have any diagnostic value?

• Yes, it is essential for image quality

• Yes, but only in certain types of radiographic exams

• No, it can degrade image quality

• No, but it is harmless to the image quality

Which process is responsible for the dark areas on the image in radiography?

• Absorption

• Transmission

• Scatter

• Reflection

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

What is the effect of scatter on the quality of a radiographic image?

• Increases contrast

• Has no effect on contrast

• Lowers contrast

• Improves image resolution