ADAA Intro to Basic Concepts in Dental Radiology Practice Test 2026 – The Comprehensive All-in-One Guide to Exam Mastery!

An artifact is any distortion on a radiograph that does not represent the true anatomy. When the receptor or processing steps become contaminated by water, blood, saliva, or chemicals, those substances leave marks on the image. These marks arise from external factors and thus are described as artifacts. Fog refers to a general loss of contrast from scatter or processing issues, not a localized mark; noise is random variation in brightness, not a specific contaminant-caused mark. Contamination describes the offending material itself, not the image feature, so the image with contamination-caused marks is best described as containing an artifact.