Which radiation type is classified as non-primary radiation?

Non-primary radiation refers to the radiation that does not come directly from the primary radiation source or the useful beam. In this context, both leakage and scatter radiation qualify as non-primary radiation.

Leakage radiation is the radiation that escapes from the x-ray tube housing and can be a safety concern for anyone near the x-ray machine. It results from imperfections in the tube design or construction, allowing some radiation to leak out.

Scatter radiation occurs when the primary beam interacts with matter, such as a patient or an object, resulting in radiation being deflected in various directions. This scattered radiation contributes to the overall exposure to individuals nearby and is not part of the intended useful beam.

Since both types of radiation, leakage and scatter, do not originate from the source of the useful beam, they are classified as non-primary. This understanding is crucial in radiation safety, as controlling exposure from these types is essential to protect patients and healthcare workers in radiological environments.