CR artifacts that appear as random small black spots are typically due to what?

• A. Fog from environmental resources
• B. Delayed exposure
• C. Improper film processing
• D. Insufficient collimation

Answer: (A)

The presence of random small black spots in computed radiography (CR) images is often attributed to fog from environmental resources. This fog can arise due to various factors, including radiation exposure from background sources or incorrect handling of the imaging plates, leading to unintended exposure before the imaging process. When these unintentional exposures occur, they create a mottled, fuzzy appearance on the final images, manifesting as small black spots.

Understanding the environment where the CR plates are stored and used is crucial for reducing the risk of such artifacts. Proper storage—ensuring that plates are kept in a controlled, low-radiation environment—can minimize the likelihood of fogging, thereby maintaining the integrity of the images and helping in accurate diagnoses.