time-gain compensation

(redirected from attenuation compensation)

time-·gain com·pen·sa·tion (TGC),

in ultrasonography, an increase in receiver gain with time to compensate for loss in echo amplitude with depth, usually due to attenuation.
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Based on this, attenuation compensation for least-squares reverse time migration is implemented [16].
Schuster, "Attenuation compensation for least-squares reverse time migration using the viscoacoustic-wave equation," Geophysics, vol.
Figure 12 shows the improvement in attenuation compensation of a 1 dB device.