What radiation safety considerations are essential when imaging a pregnant patient?

• A. Use shielding; minimize exposure; prefer ultrasound or MRI when possible; justify imaging and use lowest feasible dose.
• B. Use imaging with no shielding.
• C. Perform imaging only if the patient consents, regardless of risk.
• D. Always use CT scanning for definitive imaging.

Answer: (A)

The essential approach is to protect the fetus from ionizing radiation while still obtaining the needed diagnostic information, using the principle of ALARA—as low as reasonably achievable. For a pregnant patient, that means shielding the abdomen when feasible to reduce direct exposure, and actively minimizing the number of exposures and any repeat scans. Whenever possible, choose imaging modalities that do not use ionizing radiation, such as ultrasound or MRI, to avoid fetal radiation altogether. If an imaging study that involves radiation is necessary, justify it by weighing the benefits against the risks, and use the lowest feasible dose with proper technique and optimization to limit fetal exposure. CT scans or other ionizing studies should be reserved for situations where the diagnostic gain clearly outweighs the risk, and even then, dose should be minimized.

The other options fall short because they either omit shielding and exposure minimization, rely on consent alone without addressing fetal risk, or default to a high-radiation modality (like CT) without considering whether it’s truly necessary.