Which of the following is not a type of radiation mentioned?

Absorbed radiation refers to a concept rather than a distinct type of radiation. It describes the amount of radiation that is absorbed by a medium, such as tissue, rather than a category that is commonly defined like remnant radiation, scatter radiation, or radiation fog.

Remnant radiation is the radiation that exits the patient and is captured on the film or detector to create an image. Scatter radiation occurs when the primary beam of radiation interacts with matter and changes direction, contributing to image noise and potentially affecting image quality. Radiation fog pertains to unwanted density on the radiograph caused by scatter radiation or other factors that can obscure the diagnostic information. Thus, absorbed radiation does not fit the standard classifications of types of radiation in radiographic practice.