What is the term for the undesirable alteration of an image caused by scatter radiation?

The term that describes the undesirable alteration of an image caused by scatter radiation is scatter radiation fog. This phenomenon occurs when scattered x-rays interact with the film or digital sensor, creating a layer of fog on the image that can obscure details and reduce contrast. Scatter radiation is less focused and typically results from interactions of x-rays with surrounding materials, including the patient’s tissue, which leads to a reduction in image quality.

In a radiographic image, the presence of scatter radiation fog can make it difficult to discern important anatomical structures, as the unwanted exposure can produce a non-specific background radiation that blurs the clarity of the primary image. Understanding scatter radiation fog is crucial for radiologic technicians and radiologists to enhance image quality, as strategies can be employed to minimize its effects, such as the use of grids and appropriate positioning techniques.