When radiation interacts with the human body, it unleashes a cascade of biological effects. These effects vary based on the energy of the radiation, the type of tissue involved, and the duration and intensity of exposure. In this third installment of our series on the biological effects of radiation, we zero in on radiosensitivity—the measure of how likely cells, tissues, and systems are to be damaged by ionizing radiation. For radiography students and professionals preparing for the ARRT Registry, a de...