Which patient statement indicates an understanding of brachytherapy?

• A. This procedure involves implantation of radioactive materials directly into my tumor
• B. Radiation is delivered from outside the body using external beams
• C. Chemotherapy is given systemically
• D. Brachytherapy uses ultrasound guidance only

Answer: (A)

Brachytherapy delivers radiation with sources placed directly into or very near the tumor, so a high dose is delivered precisely where the cancer is and the effect falls off quickly in surrounding healthy tissue. That direct implantation is the hallmark of this approach, which is why the statement describing implantation of radioactive materials into the tumor reflects understanding of brachytherapy.

Think of it as placing the radiation source inside the treatment area, rather than sending beams from outside the body. External beam radiation therapy uses external beams, not implanted sources. Chemotherapy uses drugs that travel systemically through the body, not localized radiation. While imaging like ultrasound can help guide placement, brachytherapy isn’t defined as ultrasound-only; imaging supports accurate placement of the radioactive sources, but the key point is the implanted, localized radiation delivery.