In which units is the equivalent dose or organ dose measured?

The equivalent dose or organ dose is measured in REM (Roentgen Equivalent Man) and Sv (Sievert). These units are specifically designed to express the biological effect of radiation on human tissue.

REM is an older unit that relates directly to the amount of ionizing radiation a person is exposed to, taking into account the type of radiation and its impact on human health. The Sievert, a more contemporary unit, is part of the International System of Units (SI) and is used to measure equivalent dose in a way that reflects the biological effects of different types of radiation. One Sievert is equivalent to 100 REM.

Understanding these units is crucial in radiology and radiation protection, as they provide insight into the potential health risks associated with exposure to ionizing radiation. This helps in determining safe exposure levels during procedures such as fluoroscopy, where radiation dose to patients and staff must be carefully monitored.