171

Question 1

What is a possible cause of an underexposed image?

Answer 1

Insufficient mAs

Other causes include kVp set too low for the body part, SID out of range, and using a grid without adjusting technique.

Question 2

How can you correct an underexposed image?

Answer 2

Double mAs or set kVp to correct level or readjust SID

Example: Move SID from 72” to 40” if it was set incorrectly.

Question 3

What happens if an image is grossly overexposed?

Answer 3

The image is very low contrast

This may be due to too much mAs or kVp set too high for the body part.

Question 4

What is a recommended action for an overexposed image?

Answer 4

Reduce mAs or set kVp to correct level or readjust SID

Example: Move SID from 40” to 72” if it was set incorrectly.

Question 5

What can cause unwanted motion during imaging?

Answer 5

Poor patient instructions or not watching patient during exposure

Patient condition and uncooperativeness can also contribute.

Question 6

What should you do if artifacts appear in the anatomy of interest?

Answer 6

Repeat image if artifacts are seen

Remove jewelry, clothing, and report equipment issues to immediate supervisor.

Question 7

Fill in the blank: An image may appear grainy due to _______.

Answer 7

Insufficient mAs

Question 8

What is a common cause of image graininess?

Answer 8

Insufficient mAs

Other causes include kVp set too low for the body part or SID out of range.

Question 9

True or False: Using a grid technique without using the grid can lead to overexposure.

Answer 9

True

Question 10

What can help improve patient cooperation during imaging?

Answer 10

Better instructions, using immobilization, having a family member in the room

These methods can help reduce unwanted motion.

Question 11

What should be done if equipment malfunctions?

Answer 11

Report equipment issues to immediate supervisor

Also consider repeating the image using different equipment.