What term describes a nonrelevant indication that appears on a radiograph?

What term describes a nonrelevant indication that appears on a radiograph?

• A. Defect
• B. Noise
• C. Artifact
• D. Anomaly

Answer: (C)

Nonrelevant indications on a radiograph are called artifacts. In weld radiography, you want to spot real flaws like cracks or porosity, but sometimes the image shows something that doesn’t come from the weld itself. Artifacts come from the imaging process or handling—dust on the film, dust specks, processing marks, improper exposure, motion, or equipment issues. They appear on the image but do not indicate a true weld defect, so recognizing them helps avoid misreading the radiograph and chasing false flaws.

Nonrelevant indications on a radiograph are called artifacts. In weld radiography, you want to spot real flaws like cracks or porosity, but sometimes the image shows something that doesn’t come from the weld itself. Artifacts come from the imaging process or handling—dust on the film, dust specks, processing marks, improper exposure, motion, or equipment issues. They appear on the image but do not indicate a true weld defect, so recognizing them helps avoid misreading the radiograph and chasing false flaws.