Sources of secondary radiation include?
scattered radiation
leakage radiation.
The Correct Answer and Explanation is:
The correct answer is both leakage radiation and scattered radiation.
1. Leakage Radiation:
Leakage radiation refers to the radiation that escapes from the protective shielding of an x-ray machine. While the primary radiation beam is directed toward the patient, some radiation may leak out of the machine housing or other areas not covered by shielding. This can occur due to imperfections in the design or wear and tear of the equipment. Leakage radiation typically has a lower energy than the primary beam but can still pose a risk of exposure to the healthcare workers and the surrounding environment. For safety reasons, strict regulations are enforced to limit the amount of leakage radiation emitted by x-ray machines. In the United States, for example, the maximum permissible leakage is less than 100 milliroentgens (mR) per hour at a distance of 1 meter from the machine.
2. Scattered Radiation:
Scattered radiation occurs when the primary radiation beam interacts with matter, such as the patient or surrounding objects, causing the photons to be deflected or scattered in different directions. When the x-ray beam passes through the body, tissues or structures (like bones) can scatter the radiation in various directions, some of which may be directed toward the radiologic technologist or others in the room. Scattered radiation is of lower energy compared to the primary beam, but it still contributes to the overall exposure. The amount of scatter depends on factors such as the energy of the x-rays, the density and composition of the tissues, and the angle of the scatter.
Both leakage and scattered radiation are important sources of secondary radiation that pose potential risks for exposure. Therefore, it is essential to minimize secondary radiation exposure by using proper shielding, maintaining a safe distance from the x-ray beam, and adhering to safety protocols such as using lead aprons or barriers to protect both the patient and the healthcare providers.