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 Tasks. 1  Position patient and administer prescribed doses of radiation using radiation therapy equipment. 2  Use radiation safety measures and protection devices to comply with government regulations and to ensure safety of patients and staff. 3  Check radiation therapy equipment to ensure proper operation. career in radiation therapy requires at least an associate's degree, with a bachelor's degree typically preferred. One must also complete a training program that includes a certification program, as well as the study of human anatomy and physiology, science, and math.