What does echography mean?
Echography is the technique of using high-frequency sound waves — ultrasound — to create images of structures inside the body. A transducer emits pulses of sound into tissue and captures the echoes that reflect back; because different tissues reflect sound differently, a computer can assemble these echoes into real-time pictures of organs, blood vessels, and, most famously, a developing fetus. The term functions as a formal synonym of ultrasonography and sonography, though in everyday clinical conversation doctors usually simply say 'ultrasound.' Beyond medicine, echography more generally describes the recording or graphical representation of reflected sound, as in sonar applications at sea. Derived from the Greek ēchō ('sound' or 'echo') combined with -graphy ('writing' or 'recording'), the word literally means 'writing with echo.' It carries a neutral, technical connotation and appears mainly in medical literature, radiology reports, and academic contexts rather than casual speech.
A diagnostic imaging technique that uses high-frequency sound waves (ultrasound) to produce images of internal body structures; also called ultrasonography.
"Abdominal echography revealed a small cyst on the patient's liver."
In clinical practice, 'ultrasound' and 'sonography' are far more common than 'echography,' which tends to appear in formal or older medical texts.
The general process of recording or graphically representing sound waves by means of their reflections, as in sonar or other acoustic measurement.
"Echography of the ocean floor helped cartographers chart previously unmapped trenches."
Rarely used in the plural except when referring to multiple individual imaging examinations; practitioners typically speak of 'an ultrasound scan' or use 'echography' as an uncountable mass noun.
"The patient's file contained three separate echographies taken over the course of her treatment."
Long before it imaged unborn babies, 'echo' was a nymph in Greek myth who could only repeat the last words spoken to her — which is exactly what a sonogram does: it listens for sound bouncing back.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of echography
Echography derives from the Greek ēchō, meaning 'sound' or 'echo,' combined with the suffix -graphy, from graphein, 'to write or record'; it thus literally means 'recording by echo.' The term arose in twentieth-century scientific usage alongside the development of ultrasound and sonar technologies, entering medical vocabulary as ultrasonography became established as a diagnostic tool. It shares this Greek root with cognates such as echolocation, echocardiogram, and the standalone noun echo itself.
How echography is actually used
Echography is a formal, technical term used chiefly in clinical and scientific writing. In everyday speech and much of medicine, 'ultrasound' or 'sonography' is more common. In cardiology, 'echocardiography' is preferred when referring specifically to heart imaging.
Easily confused with echography
Echocardiography is a specific application of echography limited to imaging the heart, whereas echography is the broader technique of ultrasound imaging of any part of the body.
Electroencephalography (EEG) records the brain's electrical activity via electrodes on the scalp, while echography uses reflected sound waves to create images.