ARRT Exam Prep Imaging Quiz

An exposed image plate will retain its original image quality for about how many hours?

• 2 hours

• 8 hours

• 24 hours

• 48 hours

Answer explanation

The PSP layer can store its latent image for several hours; however, after approximately 8 hours, significant image fading will occur as a result of “color center” electron signal loss.

Tags

NGSS.HS-PS4-5

In radiography of a large abdomen, which of the following is an effective way(s) to minimize the amount of scattered radiation reaching the image receptor (IR)?

1)  Use of optimal collimation

2)  Use of low mAs

3)  Use of low-ratio rather than high-ratio grid

• 1 only

• 1 and 2 only

• 1 and 3 only

• 1, 2 and 3

Tags

NGSS.HS-PS4-5

NGSS.HS-PS4-3

What are the three causes of scatter in radiography?

• kVp, field size, patient thickness

• mAs, grid ratio, collimation

• Exposure time, patient movement, beam energy

• Filter type, beam alignment, patient diet

Which of the following factors are considered geometric factors that affect radiographic image quality? (select all that apply)

• Kilovoltage

• Contrast resolution

• Magnification

• Distortion

• Focal-spot blur

What is the effect of increasing the Source-to-Image Distance (SID) on spatial resolution?

• It decreases spatial resolution.

• It has no effect on spatial resolution.

• It increases spatial resolution.

• It increases motion blur.

Tags

NGSS.HS-PS4-5

What happens to the spatial resolution when there is more Object-to-Image Distance (OID)?

• Spatial resolution increases.

• Spatial resolution decreases.

• Spatial resolution remains the same.

• Spatial resolution fluctuates.

How does patient thickness affect spatial resolution?

• Increasing patient thickness increases spatial resolution.

• Increasing patient thickness has no effect on spatial resolution.

• Increasing patient thickness decreases spatial resolution.

• Increasing patient thickness increases contrast resolution.

What is the relationship between focal spot size and spatial resolution?

• Larger focal spot size increases spatial resolution.

• Larger focal spot size decreases spatial resolution.

• Focal spot size has no effect on spatial resolution.

• Smaller focal spot size decreases spatial resolution.

What effect does motion have on spatial resolution?

• Motion increases spatial resolution.

• Motion decreases spatial resolution.

• Motion has no effect on spatial resolution.

• Motion increases contrast resolution.

Spatial resolution is inversely related to which of the following?

• SID

• OID

• Grid ratio

• Both SID & Grid Ratio