SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Ultrasound scanning. Doctor using an ultrasound transducer to scan a young boy's abdomen. The transducer emits ultrasound waves (high-frequency sound waves) that are reflected by body tissues. These echoes are detected by the transducer and used to build an image (on the screen) of structures inside the body. This is a treatment laboratory of the Children's Health Protection Centre, at the Russian Academy of Sciences. Photographed in 2005, in Moscow, Russia.
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