Final answer:
Low-energy beams of radiation refer to External Beam Therapy (EBT), a precise technique using high-energy radiation like x-rays, gamma rays, or proton beams for treating surface tumors, with the radiation being delivered in a way that minimizes damage to surrounding healthy cells.
Step-by-step explanation:
The student's question pertains to the use of low-energy beams of radiation for the treatment of skin or surface tumors, the type of treatment that falls under the umbrella of External Beam Therapy (EBT). EBT is a highly precise cancer treatment that utilizes high-energy beams of radiation, such as x-rays, gamma rays, or proton beams, to target and destroy cancer cells while sparing the surrounding healthy tissue.
The process involves careful planning and imaging, such as CT scans and x-rays, to create a three-dimensional map of the tumor's location. Small tattoos and alignment lasers aid in the precise delivery of radiation, which is generated using a linear accelerator or other radiation sources like radioisotopes. Proton therapy, a form of EBT, is particularly useful for treating inoperable tumors located in sensitive areas, as it can deliver radiation directly to the tumor with minimal impact on adjacent tissues.