Artifacts

Question 1

A chemical fog artifact results in:

Answer 1

lower contrast

Question 2

Data for determining repeat rates should include at least ____ patients to obtain a statistical sample large enough for valid results.

Answer 2

250

Question 3

If residual thiosulfate is not properly removed during washing, the radiograph will

Answer 3

turn brown

Question 4

Patient motion during exposure results in _____ artifact.

Answer 4

an exposure

Question 5

Pi lines are so named because they

Answer 5

occur at regular intervals.

Question 6

Wet pressure sensitization would be classified as _____ artifact.

Answer 6

a processing

Question 7

Which of the following artifacts can occur in both CR and film/screen radiography?

Answer 7

Moiré pattern

Question 8

Which of the following can occur as a result of a double set of grid lines?

Answer 8

Moiré effect

Question 9

Which of the following will run in the same direction as that of film travel?

Answer 9

Guide shoe marks

Question 10

_______ can appear as dark bands at the interfaces of structures that differ widely in brightness level such as barium examinations or metal prosthesis.

Answer 10

Halo artifacts