International Journal of Medical and All Body Health Research  |  e-ISSN: 2582-8940  |  Double-Blind Peer Review  |  Open Access  |  CC BY-NC-SA 4.0

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     2026:7/4

International Journal of Medical and All Body Health Research

e-ISSN: 2582-8940 | Open Access

Time gain compensation in orbital ultrasonography

Dr. Hadi M Khazaei, Dr. G Seethapathy

Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, USA; Consultant Ophthalmic Plastic and Orbital Surgeon, Manipal Hospital, Salem, India

Article Information

Volume / Issue3 / 3 (July-September 2022)
Pages17-20
AccessOpen Access

Publication Timeline

  • Received20 June 2021
  • Accepted05 July 2021

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Abstract

Time gain compensation (TGC) is a setting applied in diagnostic ultrasound imaging to account for tissue attenuation. By increasing the received signal intensity with depth, the artifacts in the uniformity of a B-mode image intensity are reduced. The purpose of TGC is to normalize the signal amplitude with time, compensating for depth. rnWhen the image is displayed, similar materials should have similar brightness, regardless of depth; this is achieved by “Linear-in-dB” Gain, which means the decibel gain is a linear function of the control voltage. Gain is expressed in dB, a logarithmic ratio of the output power relative to the input power. Gain can be calculated by subtracting the input from the output levels when both are expressed in dBm, which is power relative to 1 milliwatt.rnThe TGC creates uniformity in the brightness of the echoes when used in conjunction with the overall gain. The best approach is to center all the TGC settings before adjusting the overall gain. After adjusting the overall gain, the TGC can then be adjusted to compensate for attenuation at specific depth. Gain is a uniform amplification of the ultrasonic signal that returns to the transducer after it travels through the tissue.

Keywords

Orbital UltrasoundTime gain compensation (TGC)

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How to Cite

Khazaei, H. M., & Seethapathy, G. (2022). Time gain compensation in orbital ultrasonography. International Journal of Medical and All Body Health Research, 3(3), 17-20. https://doi.org/10.54660/Ijmabhr.2022.3.3.2

Khazaei, Hadi M, and G Seethapathy. "Time gain compensation in orbital ultrasonography." International Journal of Medical and All Body Health Research, vol. 3, no. 3, 2022, pp. 17-20. https://doi.org/10.54660/Ijmabhr.2022.3.3.2.

Khazaei, H. M. and Seethapathy, G. (2022) 'Time gain compensation in orbital ultrasonography', International Journal of Medical and All Body Health Research, 3(3), pp. 17-20. doi: 10.54660/Ijmabhr.2022.3.3.2.

Khazaei HM, Seethapathy G. Time gain compensation in orbital ultrasonography. International Journal of Medical and All Body Health Research. 2022;3(3):17-20. doi:10.54660/Ijmabhr.2022.3.3.2

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