In the field of medical treatment,<unk> , or<unk>  radiotherapy, is a type of particle therapy that uses a beam of<unk> s to irradiate diseased tissue, most often to treat cancer. The chief advantage of<unk>  over other types of external beam radiotherapy (e.g.,<unk>  radiation therapy) is that the dose of<unk> s is deposited over a narrow range of depth, which results in minimal entry, exit, or scattered radiation dose to healthy nearby tissues. When evaluating whether to treat a tumor with<unk>  or<unk> , physicians may choose<unk>  if it is important to deliver a higher radiation dose to targeted tissues while significantly decreasing radiation to nearby organs at risk. The American Society for Radiation Oncology Model Policy for<unk>  Beam therapy states that<unk>  is considered reasonable in instances where sparing the surrounding normal tissue "cannot be adequately achieved with<unk> -based radiotherapy" and can benefit the patient. Like<unk>  radiation therapy,<unk>  is often used in conjunction with surgery and/or chemotherapy to most effectively treat cancer.
Proton therapy
Gestalt therapy
Hormone therapy
Vasectomy reversal
Masculinizing hormone therapy
Estrogen deprivation therapy
Antihormone therapy
Carboxytherapy