The short answer
Thermography makes a heat map of the breast surface; it does not image the tissue inside. The FDA states it has not been shown to work as a standalone screening test and has only cleared thermal imaging devices as an add-on to a primary test like mammography. The main danger is not the camera — it is a falsely reassuring result that delays a real diagnosis.
The FDA says thermography "has not been shown to be effective as a standalone test for breast cancer screening and detecting early-stage breast cancer."
Thermography devices are cleared by the FDA only as an adjunct — used alongside mammography, never instead of it.
A thermogram maps skin temperature; a mammogram makes an image of the tissue itself, which is how it finds small masses and calcifications.
In 2019 the FDA issued a warning letter to a clinic marketing thermography for breast cancer and told consumers there is no valid scientific data supporting it.
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The full explanation.
The claim
You may have seen thermography — also called breast thermal imaging or infrared imaging — promoted as a painless, radiation-free way to find breast cancer years earlier than a mammogram. Some clinics present it as a full replacement for mammography, aimed at people who find mammograms uncomfortable or who worry about x-rays.
What thermography actually measures
A thermogram uses an infrared camera to make a heat map of the surface of the breast. It does not create a picture of the tissue inside. The theory behind it is that a growing tumor recruits extra blood vessels and produces a warm spot on the skin.
Heat patterns, though, shift with many ordinary things: exercise, hormones, inflammation, skin conditions, room temperature, even how long you have been sitting. A mammogram is a different kind of test. It uses a low dose of x-rays to image the tissue itself, which is why it can show small masses and clusters of calcifications before anything can be felt.
What the evidence shows
The FDA has been direct. In its consumer update on thermography, the agency states that thermography "has not been shown to be effective as a standalone test for breast cancer screening and detecting early-stage breast cancer." Thermal imaging devices have only ever been cleared by the FDA as adjunctive — used alongside a primary test such as mammography, never instead of one.
The agency has also acted on it. In February 2019 the FDA issued a warning letter to a clinic marketing thermography for breast cancer detection and told the public there is "no valid scientific data to show that thermographic devices, when used on their own or with another diagnostic test, are an effective screening tool for any medical condition, including the early detection of breast cancer."
The FDA names the specific harm plainly: "One of the greatest risks from thermography is that those who opt for this method instead of mammography may miss the chance to detect breast cancer at its earliest stage." Mammography remains the only breast screening test shown in large trials to lower breast cancer deaths, and the U.S. Preventive Services Task Force recommends screening mammography every two years for women aged 40 to 74.
What this does not mean
It does not mean the camera itself is dangerous. There is no radiation and no compression. The problem is not the picture — it is what happens next. A normal-looking thermogram can create false confidence and delay a diagnosis. An alarming one can send you into testing you never needed.
It also does not mean mammography is perfect. Mammograms miss some cancers, flag some things that turn out to be harmless, and work less well in dense breast tissue. Those limits are real and worth raising with your clinician. But an unproven test does not fix a proven test's weaknesses.
If discomfort or radiation is what is holding you back, say so out loud at your appointment. Positioning and technique can often be adjusted. And for people at higher risk, there are additional imaging options — breast MRI or ultrasound — that have actually been studied.
The bottom line
Thermography is not a substitute for mammography, and the FDA says so explicitly. If a clinic offers you thermal imaging as a replacement for mammography rather than as an extra, treat that as a reason for caution rather than reassurance. Bring the offer to your own clinician and ask what screening schedule fits your personal risk.
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Common questions
Is thermography FDA approved for breast cancer screening?
No. The FDA has cleared thermal imaging devices only as an adjunctive tool, meaning they may be used alongside a primary test such as mammography. No thermography device is cleared or approved to screen for or diagnose breast cancer on its own.
Can thermography detect breast cancer years before a mammogram?
That claim is not supported. The FDA has said it is not aware of scientific evidence backing claims that thermography detects cancer years earlier or performs better in dense tissue.
Is thermography safe? It has no radiation and no compression.
The infrared camera itself does not expose you to radiation and does not touch or compress the breast. The risk comes from the result rather than the device: a normal-looking thermogram can create false reassurance and delay a diagnosis, and an abnormal one can lead to testing you did not need.
My mammogram is uncomfortable and I am worried about radiation. What are my options?
Say that at your appointment. Positioning, timing in your cycle, and technique can often be adjusted, and depending on your risk level and breast density your clinician may discuss breast MRI or ultrasound alongside mammography. Those options have been studied; thermography has not.
Why do some clinics still offer thermography for breast screening?
It is offered largely outside mainstream medicine and is usually paid for out of pocket. The FDA has taken enforcement action against clinics marketing thermography devices for breast cancer detection without clearance for that use.
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Written by: Cancer Explained Editorial TeamSources last checked: 2026-07-30Last updated: 2026-07-30Next planned review: 2028-07-29
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source verified — This page was created with AI assistance and checked against the sources listed on it. Source checking is not a medical review.
Human medical review: not completed. Cancer Explained is not clinician-reviewed, and that is a deliberate design choice rather than a gap we are waiting to close. We restate published federal guidance and cite it; the authority belongs to the source, not to us. That is why every page names where its claims come from — so you can verify us instead of trusting us. Use it to understand your situation and to ask better questions of the people treating you.
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