If a pregnant patient is inadvertently irradiated, which professional should perform the calculations to determine fetal dose?

• A. Imaging department manager
• B. Radiologist
• C. Radiographer performing the examination
• D. Radiologic physicist

Answer: (D)

When post-exposure fetal dose must be estimated, it requires specialized dosimetry expertise. A radiologic physicist is trained to perform these calculations using information from the exposure (beam energy, amount of exposure, field size, distance), patient factors (gestational age and shielding), and measurement data. They can convert that information into an estimated fetal dose and provide risk context and guidance for follow-up.

The radiologist, while responsible for interpreting images and advising on clinical care, typically does not perform detailed dosimetry calculations. The radiographer operates the equipment and ensures proper technique, but the precise assessment of fetal dose after incidental exposure lies with the dosimetry expert. The imaging department manager oversees overall safety programs and operations, not the specific calculations of fetal dose.