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.
Duties. Radiation therapists typically do the following: 1  Explain treatment plans to the patient and answer questions about treatment. 2  Follow safety procedures to protect the patient and themselves from overexposure to radiation.3  Examine machines to make sure they are safe and working properly.ecause they work with radiation and radioactive material, radiation therapists must follow safety procedures to make sure that they are not exposed to a potentially harmful amount of radiation. These procedures usually require therapists to stand in a different room while the patient undergoes radiation procedures.