What imaging exams are safe during pregnancy?

Pregnancy is a time when caution is essential — especially when medical imaging is required. In some cases, imaging tests may be necessary to evaluate the health of the mother or the baby. Certain exams are considered safe during pregnancy, while others may be delayed or adjusted. This article addresses common concerns among expectant mothers about imaging safety.

Exams Generally Considered Safe

Ultrasound

  • Ultrasound is the standard imaging test during pregnancy.

  • It uses sound waves (not radiation).

  • It can be used to visualize the fetus, monitor growth, assess the placenta, or examine maternal organs.

  • No harmful effects have been demonstrated when used medically and appropriately.

 

MRI (Magnetic Resonance Imaging) – without contrast

  • MRI may be recommended for detailed evaluation (e.g., brain, abdomen, spine).
    It does not emit X-rays.

  • It is generally considered safe starting in the second trimester, though it may be used earlier if medically necessary.

  • Non-contrast MRI is preferred during pregnancy.

Exams Evaluated Case by Case

MRI with gadolinium (contrast)

  • Gadolinium crosses the placenta.

  • Its use is generally avoided during pregnancy unless clearly indicated.

X-ray and CT scan

  • These tests use ionizing radiation.

  • They are not automatically contraindicated but are used with caution.

  • Protective measures are applied (e.g., shielding the abdomen, directing the beam away from the uterus).

Key Reminders for Expectant Mothers

All exams are prescribed carefully. If a doctor recommends imaging during pregnancy, it is generally because the benefit outweighs the potential risk. Feel free to ask your healthcare provider any questions about the purpose and implications of the test.

Need an Imaging Exam?

If you have a medical prescription for an imaging exam during pregnancy, you can submit your request through our website: radimed.ca — a member of our team will contact you.

Sources

Society of Obstetricians and Gynaecologists of Canada (SOGC) – https://sogc.org

Government of Quebec – https://www.quebec.ca – pregnancy and medical testing – https://www.quebec.ca/sante/conseils-et-prevention/grossesse/examens-medicaux