Saturation artifact on a radiograph is caused by which exposure condition?

• A. Inadequate receptor exposure
• B. Excessive receptor exposure
• C. Incorrect post-processing
• D. Small matrix size

Answer: (B)

When the receptor receives too much radiation, the detector’s signal can’t register any higher values because its range is limited. This overloading clips the pixel values at their maximum, so regions become uniformly dense and lose detail—a saturation artifact. In other words, excessive receptor exposure pushes the image beyond what the detector can record, washing out fine structures in the overexposed areas. Underexposure would cause overall poor darkness and image noise, post-processing issues arise from software adjustments rather than the detector’s capacity, and a small matrix size affects sharpness, not saturation.