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 Therapist. Radiation therapists use ionizing-radiation producing equipment to administer therapeutic doses of radiation as prescribed by physicians for treatment of disease â generally cancer. Many work in hospital settings, while others work in physician offices, outpatient care centers, and labs.reviously, ARRT used radiation therapy technologist to refer to technologists working in radiation therapy. However, in 1990, the ARRT's Board of Trustees voted to change the terminology to radiation therapist, and the change went into effect in June 1992.