Treatment accessories used in radiation therapy include:

Treatment accessories in radiation therapy play a crucial role in optimizing the delivery of radiation to the target area while minimizing exposure to surrounding healthy tissues. The correct choice includes wedges, compensators, and bolus materials, as these elements are specifically designed to modify the radiation beam's shape and distribution.

Wedges are devices that are placed in the radiation beam to create a gradual dose fall-off in certain areas, accommodating for variations in tumor depth and shape. They help in achieving a more uniform dose distribution across the treatment volume. Compensators serve a similar purpose, as they are individually shaped to compensate for irregularities in patient anatomy and allow for more precise dose delivery to the tumor while protecting adjacent healthy tissues. Bolus materials are used to bring the dose to a desired depth or to ensure that the prescribed dose is delivered to the skin surface. They can be particularly useful for superficial tumors.

In contrast, the other options focus on more specialized or less comprehensive treatments. For instance, collimators and gauges, while important for beam shaping and placement accuracy, are not classified as treatment accessories in the same context as wedges, compensators, and bolus materials. Field shaping blocks can also be useful, but they are more limited in application compared to the broader range of