Final answer:
Brachytherapy is a form of therapy that involves the use of radioactive material implanted into the tissue to be treated.
Step-by-step explanation:
Brachytherapy involves placing ionizing pellets (seeds) or rods directly at the tumor. Photons (in the form of x-ray or gamma ray) are produced inside the body and will penetrate throughout this particular area localizing the radiation. Pellets are surgically implanted while rods can be temporarily inserted to produce radiation internally.
Brachytherapy is a form of therapy that involves the use of radioactive material implanted into the tissue to be treated.