Which type of imaging is avoided during pregnancy due to potential risks?

X-rays are generally avoided during pregnancy due to the potential risks associated with ionizing radiation exposure to the developing fetus. Exposure to X-ray radiation can lead to adverse outcomes, such as increased risks of congenital abnormalities, particularly during the first trimester when fetal organ systems are forming. While the dose from a single X-ray is usually very low, precautions are taken to minimize any risk to the fetus, especially given the unknown long-term effects of radiation exposure during critical periods of development.

In contrast, ultrasound is considered safe for use during pregnancy, as it uses sound waves rather than ionizing radiation. Similarly, MRI is also seen as a safe option during pregnancy, although it is typically used only when necessary due to cost and availability factors. CT scans involve a higher dose of radiation than X-rays and, while they may sometimes be employed if the benefits clearly outweigh the risks, they are also approached with caution during pregnancy. However, X-rays remain the imaging modality most commonly avoided due to their inherent risks from radiation exposure.