Which type of radiation is typically considered harmful and non-useful?

Stray radiation is referred to as harmful and non-useful because it represents the radiation that is not directed toward the intended area of examination and can pose a risk to both radiation workers and the surrounding environment. This type of radiation can result from the scattering of primary radiation or can escape from the apparatus being used, often leading to unnecessary exposure for individuals who are not part of the diagnostic process.

In radiographic contexts, minimizing stray radiation is critical for ensuring safety, which is why understanding its characteristics is essential for those working in the field. Proper shielding and safety protocols are often implemented to reduce the effects of stray radiation, emphasizing the importance of controlling and limiting exposure. Familiarity with this distinction helps radiographic personnel maintain a safe working environment while optimizing the diagnostic use of radiation.