Ultrasound and MRI: usually the first choice
Ultrasound uses sound waves, not radiation, and is the preferred imaging test during pregnancy whenever it can answer the clinical question. It is used routinely to monitor pregnancy itself and is considered safe for both you and the baby.
MRI also does not use ionizing radiation. Non-contrast MRI is generally considered safe in pregnancy when the information is clinically necessary, and it is often used when ultrasound cannot provide enough detail. When possible, MRI is performed only when the benefit clearly justifies it, particularly in the first trimester.
X-ray and CT: when radiation needs extra thought
X-ray and CT use ionizing radiation. A single diagnostic X-ray — especially of an area away from the abdomen and pelvis, such as a chest, hand, or foot — delivers a very small dose to the baby and is often safe when clinically needed, with abdominal shielding used when appropriate.
CT delivers more radiation than a plain X-ray. During pregnancy it is generally avoided unless the information is essential and cannot be obtained another way. When a CT of the abdomen or pelvis is truly necessary, our radiologists adjust the protocol to keep the dose as low as reasonably achievable.
Contrast during pregnancy
Gadolinium-based contrast used in some MRI exams crosses the placenta and is usually avoided in pregnancy unless it is essential and no alternative exists. Most MRI exams during pregnancy are performed without contrast.
Iodine-based contrast used in CT is generally considered low risk, but like the CT itself it is reserved for situations where the benefit clearly outweighs any concern. Tell us if you are breastfeeding as well — both gadolinium and iodine contrast are considered compatible with continued breastfeeding.
Why telling us matters most
The most important safety step is letting us know if you are or might be pregnant before your exam — even if the test is not of your abdomen. This lets our radiologist confirm the test is the right one, choose a non-radiation alternative when possible, and apply shielding and dose reduction when radiation is used.
For exams that use radiation, we may offer a urine pregnancy test on site if there is any uncertainty. There is no judgment — this is a routine part of keeping you and a possible pregnancy safe.
If this applies to you
- Tell the scheduler and the technologist if you are pregnant or could be, even for exams away from the abdomen.
- Ask whether ultrasound or MRI could answer the question instead of X-ray or CT.
- Mention if you are breastfeeding so we can reassure you about contrast.
- Bring the date of your last menstrual period or your due date if you know it.
- Share any high-risk pregnancy concerns with your ordering provider and our team.
Call us before your appointment if…
- You are pregnant or think you might be and your exam uses X-ray or CT.
- You are scheduled for a CT of the abdomen or pelvis and are pregnant.
- You have been told you need contrast and are pregnant or breastfeeding.
- You are unsure whether a non-radiation test could be used instead.
This page is general patient education and does not replace the medical advice of your physician. It describes how Precise Imaging operates today and is not a substitute for the specific instructions on your appointment confirmation. Always discuss your medical history with the provider who ordered your exam.
Frequently asked questions
Is it safe to have imaging during pregnancy?
Many tests are. Ultrasound and non-contrast MRI do not use ionizing radiation and are generally considered safe when clinically needed. X-ray and CT use radiation and are used in pregnancy only when the benefit outweighs the small risk, with the dose kept as low as possible.
Will an X-ray harm my baby?
A single diagnostic X-ray — particularly of an area away from the abdomen and pelvis — delivers a very small dose and is generally considered safe when clinically necessary. We use shielding when appropriate. Always tell us you are pregnant so we can confirm the safest approach.
Can I have a CT scan while pregnant?
CT is generally avoided in pregnancy unless the information is essential and cannot be obtained another way. When it is truly needed, our radiologists tailor the protocol to keep radiation as low as reasonably achievable.
Is MRI safe in pregnancy?
Non-contrast MRI is generally considered safe in pregnancy when the information is clinically necessary. Gadolinium-based contrast is usually avoided unless it is essential and no alternative exists.
What if I don't know whether I'm pregnant?
Tell us anyway. For exams that use ionizing radiation we may offer a urine pregnancy test on site. For MRI and ultrasound the question still matters because it informs contrast decisions.
Can I have contrast if I'm breastfeeding?
Yes. Both gadolinium (MRI) and iodine (CT) contrast are considered compatible with continued breastfeeding. You do not need to pump and discard your milk, though you may if it makes you more comfortable.