Range gating utilized the selection of a returning ultrasound wave according to its depth by receiver activation at the appropriate time delay. The ultrasonic signal is selected by the range gate.

The Receiver is the component of the ultrasound machine that receives the current generated in the transducer from the returning sound waves.

See also Blanking Distance, and Range Gating.

From GE Healthcare.;
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To calculate the echo position, a constant sound speed of 1538.5 m/sec is assumed. Tissue penetration is frequency depended, if the frequency increases, the imaging depth decreases. The range resolution defines the depth. Ultrasound propagating in tissue is attenuated due to scattering and absorption. The attenuation is proportional to depth and frequency and is typically in the range from 0.5 to 1 dB/(MHz cm).

See also Attenuation Coefficient, Proximity Sensor, and Echo Ranging.