A declared pregnant radiographer may receive a maximum of how much radiation over the entire pregnancy?

The maximum dose limit for a declared pregnant radiographer is set to limit the potential risk to the developing fetus from radiation exposure. According to guidelines from organizations such as the National Council on Radiation Protection and Measurements (NCRP) and the International Commission on Radiological Protection (ICRP), the recommended dose limit for the entire pregnancy is 500 mR (milliroentgens). This value reflects a cautious approach to ensure the safety of both the mother and the fetus, recognizing the sensitivity of the developing organism during pregnancy.

This limit allows for a controlled environment where radiographers can perform their duties while being mindful of their pregnancy and the exposure risks involved. It's important to adhere to this limit as exposure beyond this threshold could increase the risk of developmental issues for the fetus. The figures provided in the other options, while lower, do not reflect the established guidelines for pregnant radiographers in the context of the concerns about radiation exposure.