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Radiology
Chapter Five
Term | Definition |
---|---|
Acute Radiation Syndrome | Symptoms of the short-term radiation effects after a massive dose of ionizing radiation. |
ALARA | As low as reasonably achievable. Adopted as a culture and attitude of professionals who work with ionizing radiation to minimize radiation exposure and risks. |
Dose Rate | The radiation dose received per unit of time. |
Dose-Response Curve | Graph produced when radiation dose and the resultant biological response are plotted. |
Effective Dose Equivalent | Aids in making more accurate comparisons between different radiographic exposures. Compensates for the differences in area exposed and the tissues that may be in the path of the x-ray beam. Measured in microsieverts (µSv). |
Irreparable Injury | Following exposure to radiation, injury that results in damage that is not repaired during the recovery period. May give rise to later long-term effects of radiation exposure. |
Latenet Period | The time between exposure to radiation and the first clinically observable symptoms. Latent means hidden. |
Radioresistant | Refers to a substance or tissue that is not easily injured by ionizing radiation. |
Radiosenesitive | Refers to a substance or tissue that is relatively susceptible to injury by ionizing radiation. |
Recovery Period | Period following exposure to radiation, where some healing can take place. |
Somatic Cells | Any body cells except the reproductive cells. |