Final answer:
Pixel dropout artifact in radiographic images appears as small black or white dots or streaks caused by various factors such as malfunctioning detector elements or signal interruptions. Quality control measures can minimize these artifacts.
Step-by-step explanation:
The pixel dropout artifact in a normal radiographic image, produced by computed radiography or DR, appears as small black or white dots or streaks on the image. These artifacts occur when one or more pixels fail to record the correct level of radiation exposure. This can happen due to various reasons such as malfunctioning detector elements or signal interruptions during imaging.
For example, in computed radiography, pixel dropout artifacts can be caused by dust or debris on the imaging plate, improper handling, or damage to the phosphor layer. In digital radiography, these artifacts can be caused by issues with the image receptor or processing software.
To minimize the occurrence of pixel dropout artifacts, quality control measures should be implemented, including regular maintenance and calibration of the imaging equipment, proper handling of the imaging plates or detectors, and careful inspection of the images for any artifacts before diagnostic interpretation.