DANB Radiation Health and Safety (RHS) Exam 2025 – 400 Free Practice Questions to Pass the Test

The appropriate choice correctly identifies that a larger and more divergent beam increases exposure. This is based on the fundamental principle that beam size directly correlates with the area being irradiated. When the radiation beam is larger and more divergent, it spreads out over a broader area, leading to a higher dose being delivered to the patient. This wider dispersion increases the likelihood of irradiating not just the target area but also surrounding tissues, which ultimately results in a greater overall exposure to radiation.

In contrast, a smaller, more focused beam is designed to minimize exposure to only the necessary tissues, thereby potentially decreasing the dose delivered to unintended areas. Therefore, when considering radiation safety and patient protection, the size and shape of the beam play a crucial role in dose management. A narrow beam is utilized to target specific areas and reduces overall exposure to other tissues, affirming that conscientious use of beam geometry is foundational in radiographic practices.