CAMRT Radiography Practice Exam

What is the total NCRP recommended occupational dose limit for an embryo or fetus during the entire gestation period?

1. 1.0 mSv

2. 5.0 mSv

3. 10.0 mSv

4. 15.0 mSv

The correct answer is: 5.0 mSv

The National Council on Radiation Protection and Measurements (NCRP) recommends an occupational dose limit for an embryo or fetus throughout the entire gestation period, which is set at 5.0 mSv. This limit is designed to ensure the safety of the developing fetus by minimizing the potential risks associated with radiation exposure during pregnancy. The rationale behind this limit is based on the understanding that the embryo and fetus are particularly sensitive to radiation during critical periods of development, especially during the first trimester when the organs and systems are forming. Keeping the dose to 5.0 mSv helps mitigate risks such as developmental abnormalities and potential long-term health effects. The choice of 5.0 mSv also aligns with regulatory recommendations regarding occupational exposure, establishing a balance between ensuring the safety of the fetus while allowing for some level of necessary occupational exposure for those in certain professions, such as radiology. This consideration underscores the principle of justification and optimization in radiation protection for both workers and any impacted individuals.