Can You Have Scans When Pregnant? A Practical Guide to Imaging Options

Learn when scans are appropriate during pregnancy, safe imaging options like ultrasound and MRI, and how clinicians balance fetal safety with medical necessity. Practical guidance from Scanner Check.

Scanner Check Team

March 2, 2026·5 min read

MRI Scanner Scan Health Scanner Diagnostics Document Scanning

Imaging During Pregnancy - Scanner Check — Photo by fernandasuzukimakeupvia Pixabay

Quick AnswerDefinition

Yes. Scans during pregnancy are possible when medically necessary. The safest and most common option is ultrasound, which uses sound waves and avoids radiation. If other imaging is needed, MRI can be considered (without gadolinium), while X-ray or CT are used sparingly with protective shielding and dose limits. Always consult your obstetrician and radiology team to balance benefits and fetal risk.

Why Imaging During Pregnancy Is Sometimes Necessary

Imaging plays a critical role when a clinician suspects a condition that could affect the health of the mother or baby. Imaging helps diagnose issues such as abdominal pain, placental problems, suspected fetal anomalies, or diseases that require timely treatment. The decision to image is guided by medical necessity, potential benefits, and the least risky option available. According to Scanner Check, the goal is to obtain essential information while minimizing fetal exposure to any unnecessary procedures. In practice, imaging is used only when the benefit to the patient outweighs potential risk, and clinicians tailor approaches to the pregnancy stage and clinical context.

When symptoms could indicate a serious condition, imaging may be required for a correct diagnosis.
The care team prioritizes noninvasive, non-ionizing methods first.
Pregnant patients should be involved in the decision-making process and given clear explanations of risks and alternatives.

Voice-friendly note: Imaging during pregnancy should be guided by your clinician and radiology team, focusing on safety and necessity.

Safe Imaging Modalities for Pregnant Patients

The imaging toolbox for pregnancy emphasizes safety and diagnostic value. The main modalities to know are ultrasound, MRI (without gadolinium), and ionizing radiation options like X-ray or CT only when absolutely necessary.

Ultrasound (first-line): Uses sound waves, no ionizing radiation, and is widely used to monitor fetal development and maternal health. It is considered safe when performed by trained personnel and only as needed.
MRI (second-line or for specific concerns): Does not use ionizing radiation and is generally considered safe during pregnancy for many indications. Gadolinium-based contrast is typically avoided unless absolutely essential. The timing and need are weighed by the radiology team.
X-ray/CT (last resort): Involves ionizing radiation. If imaging with radiation is unavoidable, the abdomen is shielded, and the smallest effective dose is used. The decision hinges on whether the information gained will change management more than the potential risk.

Voice-friendly takeaway: Ultrasound is usually the safest and first choice; MRI is possible for certain problems; X-ray/CT is avoided unless benefits clearly outweigh risks.

What to Expect in Each Modality

Ultrasound: External or transabdominal ultrasound is noninvasive and quick. Transvaginal ultrasound may be used in early pregnancy to assess the uterus and ovaries. Sessions are typically short, with real-time images and measurements. You can usually resume activity immediately afterward.
MRI: An MRI uses magnetic fields and radio waves. It is noninvasive and does not involve radiation. You’ll lie still inside a bore with a coil around the area being imaged. The procedure takes anywhere from 15 to 60 minutes, depending on the instructions. If a contrast agent is considered, gadolinium is avoided in pregnancy.
X-ray/CT: If needed, these tests involve ionizing radiation. The abdomen can be shielded to limit fetal exposure, and dose optimization strategies are used. Expect a fast scan with potentially brief exposure; you’ll discuss the necessity and safety with the radiology team beforehand.

Voice-friendly note: Expect clear explanations from the radiology team about what each test can and cannot reveal and why it’s being ordered.

How Doctors Decide If a Scan Is Needed During Pregnancy

Decision-making hinges on clinical necessity and risk–benefit analysis. Physicians consider the urgency of the condition, alternative imaging options, and the potential impact on treatment decisions. Guidelines and standard practices prioritize noninvasive methods and minimize radiation exposure whenever possible.

The obstetrician and radiologist collaborate to assess whether imaging will improve outcomes.
If the information won’t change management or could wait, imaging may be deferred.
When imaging is essential, the team uses the lowest effective dose and shielding to protect the fetus.

Voice-friendly note: Discuss options openly with your care team, including what information the test will provide and what alternatives exist.

Special Considerations for Each Trimester

First trimester: The embryo is especially sensitive to radiation in early development, so imaging is typically limited to scenarios where it will impact treatment or outcomes. Ultrasound is preferred for early assessments.
Second trimester: Most imaging needs can be addressed with ultrasound and MRI without gadolinium. Nonurgent imaging may still be postponed if possible.
Third trimester: Imaging priorities shift toward planning delivery and monitoring maternal health. Ultrasound remains central, and MRI can be used if indicated. Shielding and dose minimization remain standard.

Voice-friendly note: Your care team will tailor imaging plans to the pregnancy stage and medical necessity, balancing maternal and fetal safety across all tests.

Common Myths About Scans in Pregnancy

Myth: All scans expose the fetus to radiation. Fact: Only tests like X-ray or CT involve ionizing radiation; ultrasound and MRI do not involve ionizing radiation when gadolinium is avoided.
Myth: MRI is dangerous for every pregnancy. Fact: MRI is generally considered safe for many indications, especially without gadolinium; decisions are case-specific.
Myth: More scans are always better. Fact: Unnecessary imaging adds time, cost, and potential risk without improving outcomes. Imaging should be clinically warranted.

Voice-friendly note: The right test is the one that answers a clear clinical question with the lowest risk, not the most tests.

Practical Preparation and Safety Tips

Always inform your imaging team about the pregnancy, gestational age, and any prior imaging or contrast exposure.
Dress in comfortable clothing and remove jewelry or metal objects that may interfere with MRI.
If contrast is considered, ask about risks and alternatives; gadolinium is usually avoided in pregnancy.
Bring a support person or advocate to help understand explanations and decisions.
After imaging, rest as advised by the clinician and monitor for any unusual symptoms and report them promptly.

Voice-friendly note: Being prepared and informed helps you and your care team make safer imaging choices during pregnancy.

MRI safety guidelines during pregnancy and how radiologists assess risk
Ultrasound basics for obstetric care and fetal measurements
Radiation exposure in pregnancy: what patients should know
How to discuss imaging plans with your obstetrician and radiology team
When to seek a second opinion about imaging during pregnancy

Voice-friendly note: If you’re seeking more information, consider related topics to broaden your understanding of imaging safety during pregnancy and how decisions are made.

Common Questions

Is ultrasound safe during pregnancy?

Yes. Ultrasound is the first-line imaging modality during pregnancy because it uses non-ionizing sound waves and has a long track record of safe use for fetal monitoring and maternal assessments. It should be performed when medically indicated and by trained professionals.

Can MRI be used during pregnancy?

MRI is generally considered safe during pregnancy for many indications, especially when ultrasound cannot provide the needed information. Gadolinium contrast is typically avoided unless absolutely essential. The decision is made by the radiology team in consultation with obstetrics.

Are X-ray or CT scans safe during pregnancy?

X-ray and CT involve ionizing radiation and are avoided unless the potential benefit outweighs the fetal risk. If used, shielding and dose optimization minimize exposure. Your clinicians will discuss alternatives whenever feasible.

What about gadolinium contrast in pregnancy?

Gadolinium-based contrast is generally avoided in pregnancy because of potential fetal risks. If essential information cannot be obtained otherwise, very careful consideration and consultation with specialists is required.

How should I talk with my doctor about imaging?

Explain your pregnancy status, symptoms, and timing. Ask about alternatives, risks, and why a specific test is recommended. Ensure you understand the plan and consent to the imaging process.

What if imaging is urgent early in pregnancy?

Urgent imaging may proceed if the information will clearly affect treatment decisions and patient outcomes. The team will minimize fetal exposure and use the safest feasible modality.