What unit is used to measure radiation dose?

The Sievert (Sv) is the unit that is commonly used to measure the biological effect of ionizing radiation on human tissue. It provides a measure of the health effect of low levels of radiation on the human body. The Sievert takes into account both the type of radiation and the sensitivity of different tissues, allowing for a more accurate assessment of risk compared to other units.

While the Gray (Gy) is indeed a unit of absorbed radiation dose, it does not address the biological impact on human tissue specifically. The rem is an older unit used to quantify doses of ionizing radiation based on their biological effects, but it has largely been replaced by the Sievert in most modern contexts. The Curie (Ci) measures radioactivity but is unrelated to the dose of radiation received by an individual.

Thus, the use of the Sievert to measure radiation dose reflects a comprehensive approach to understanding the potential health risks of radiation exposure.