BSIP, ATL / SCIENCE PHOTO LIBRARY BSIP, ATL / SCIENCE PHOTO LIBRARY
Foetal ultrasound. Three-dimensional (3-D) ultrasound scan of a 30 week old foetus. The image was produced by a Kretz system, which enables foetal disorders such as harelip and spina bifida to be diagnosed before birth. Once detected, it may be possible to perform corrective surgery while the foetus is still in the uterus. Ultrasound is a diagnostic technique which sends high-frequency sound waves into the body via a transducer. The returning echoes are recorded and used to build an image of an internal structure.
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