Lichen is the symbiotic association of a fungus (the mycobiont, which provides shelter and structure for the partnership or symbiosis), with an alga or cyanobacterium (the phoâ¦tobiont, also known as the phycobiont, which provides the food for the partnership from photosynthesis).
Some radiation therapy delivery methods include: 1  External beam radiation therapy â radiation is directed from a machine outside the body onto cancerous cells within the body.  Internal radiation therapy â radioactive material is placed (via a catheter or other carrier) directly into or near a tumor.
Radiation therapists might be employed in hospital radiation treatment departments. Radiation therapy may cause some cancer patients to experience nausea and vomiting. Some therapists may offer radiosurgery, which focuses beams of radiation directly at the tumor site.adiation therapists might be employed in hospital radiation treatment departments. Radiation therapy may cause some cancer patients to experience nausea and vomiting. Some therapists may offer radiosurgery, which focuses beams of radiation directly at the tumor site.