definitions - understudies. understudy (n.) 1.someone who takes the place of another (as when things get dangerous or difficult)the star had a stand-in for dangerous scenes we need extra employees for summer fill-ins. 2.an actor able to replace a regular performer when required. understudy (v.)
Radiation can come in the form of a pill. Iodine (131 I) used in thyroid treatment might be given in pill form or as a liquid. The choice is an institutional decision based on many factors, including the amount to be given to a patient.
Radiation exposure. Potassium iodine can be taken after someone is exposed to radiation to reduce the amount of radioactive iodine that accumulates in the thyroid. This action reduces the risk of thyroid cancer from radiation exposure, but it does not protect against other complications from radiation.