Health glossary · Diagnostic Imaging

Thermography

ther-MOG-ruh-feenoun

An imaging technique that maps body surface heat using an infrared camera.

Thermography uses a specialized infrared camera to create a heat map of the body's surface, detecting differences in skin temperature that may reflect activity in underlying tissue. While it has been studied as a potential breast cancer screening tool, it is not currently recognized as a replacement for or equivalent to mammography.

Part of speechnoun
Pronunciationther-MOG-ruh-fee
OriginFrom Greek therme (heat) + -graphia (writing, recording). Medical thermography — using infrared cameras to map body surface temperature — was explored in the 1960s as a potential breast screening tool but is not currently approved as a replacement for mammography.

What is thermography?

Thermography works on the principle that metabolically active tissues — including some tumors — generate heat, which shows up as warmer areas on an infrared image. The camera captures these temperature variations without using radiation or compression, which makes it appealing to some people as an alternative to mammography.

However, major medical organizations — including the U.S. Food and Drug Administration and leading radiology and oncology groups — do not recommend thermography as a replacement for mammography in breast cancer screening. Studies have not shown it to be as reliable at detecting early-stage cancers, and using it instead of mammography may lead to missed diagnoses.

Thermography continues to be studied in various research contexts, and the science may evolve. But as of now, if you are considering any screening approach, a conversation with your healthcare provider about evidence-based options — including standard mammography, ultrasound, or MRI depending on your individual risk profile — is the most reliable path forward.

Why it matters

Thermography comes up frequently in conversations about breast health because it is marketed as a radiation-free, painless alternative to mammography. Understanding what the evidence actually shows helps you make informed choices. Being an informed patient means knowing not just what a technology does, but what the medical community's consensus is on its reliability.

If you have concerns about radiation exposure from mammography or are looking for supplemental tools, your radiologist or breast health provider can walk you through the options that are appropriate for your specific situation and risk level.

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