<unk>  is a form of external beam radiotherapy using beams of energetic neutrons, protons, or other heavier positive ions for cancer treatment. The most common type of<unk>  as of 2012 is proton therapy. In contrast to X-rays (photon beams) used in older radiotherapy,<unk>  beams exhibit a Bragg peak in energy loss through the body, delivering their maximum radiation dose at or near the tumor and minimizing damage to surrounding normal tissues.<unk>  is also referred to more technically as hadron therapy, excluding photon and electron therapy. Neutron capture therapy, which depends on a secondary nuclear reaction, is also not considered here. Muon therapy, a rare type of<unk>  not within the categories above, has also been attempted.
Particle therapy
Asthma spacer
Ozone therapy
Negative air ionization therapy
Hyperinflation therapy
Aspiration therapy
Cytoluminescent therapy
Exposure therapy