CRI Image Quality & Artifacts 3

Question 1

What is the effect of increasing kilovoltage (kV) on radiographic contrast?

Accepted Answer

Contrast decreases because higher kV produces more uniform beam penetration

Answer

Higher kV increases beam penetrating power and reduces differential absorption between materials, resulting in lower (flatter) radiographic contrast.

Question 2

A circular, dark spot with a light halo on a film radiograph is most characteristic of which artifact?

Accepted Answer

Water drop artifact during processing

Answer

Water drops on film before or during processing cause localized developer concentration changes, producing a dark center with a surrounding lighter halo pattern.

Question 3

In industrial radiography, what does the term 'equivalent penetrameter sensitivity' (EPS) measure?

Accepted Answer

The smallest detectable hole in an IQI expressed as a percentage of specimen thickness

Answer

EPS expresses the smallest visible IQI hole diameter as a percentage of specimen thickness, serving as a standard measure of radiographic technique sensitivity.

Question 4

Which processing artifact results from film being fed unevenly through an automatic processor, causing alternating light and dark bands perpendicular to the film transport direction?

Accepted Answer

Roller marks / hesitation marks

Answer

Roller marks or hesitation marks appear as periodic light or dark bands when film transport is intermittent or rollers are dirty, causing uneven developer contact.

Question 5

What is the primary advantage of using a higher film-to-source distance (FSD) in industrial radiography?

Accepted Answer

Reduced geometric unsharpness and improved image sharpness

Answer

Greater FSD reduces the geometric unsharpness by increasing the source-to-object distance relative to object-to-film distance, producing sharper images.

(CRI) Certified Radiographic Interpreter Practice Test

(CRI) Certified Radiographic Interpreter Practice Test

CRI Image Quality & Artifacts 3