2020年3月31日 · A way to overcome ultrasound attenuation is time gain compensation (TGC), in which signal gain is increased as time passes from the emitted wave pulse. This correction makes equally echogenic tissues look the same even if they are located in different depths.

2017年1月19日 · TGC (Time Gain Compensation) - selectively adjusting the gain at different depths. Some portable systems like those from SonoSite and use a simple near or far field adjustment. As the name implies, turning the near field gain dial will adjust the image gain in the top half of the image.

Manual TGC (a) and adaptive TGC (b) of liver and right kidney. One of the skills that an operator has to learn in order to obtain well balanced ultrasound images is the ability to set up the...

Abstract-The quality of ultrasonic images is often adversely affected by incorrect time gain compensation (TGC) settings. TGC set up by the operator is inadequate for two reasons: firstly, one gain function is unlikely to be appropriate for all the scan lines in an image and secondly, the operator may not have sufficient time or experience

The purpose of TGC is to normalize the signal amplitude with time; compensating for depth. When the image is displayed, similar material should have similar brightness, regardless of depth and this is achieved by “Linear-in-dB” Gain, which means the decibel gain is …

2014年1月1日 · Time gain compensation (TGC) selectively allows modifying the amplification of returning echoes from structures in different depths for uniform image intensity.

TGC: Time Gain Compensation (sometimes referred to as STC or Sensitivity Time Control) – Displayed as slide pods that are used to compensate for the attenuation of the transmittal beam as the sound wave travels through tissue in the body.1 Whereas the Gain controls the brightness of the overall image, the TGC/STC has the ability to control ...

In this article, we review the practical aspects of US image optimization for the interventional radiologist, including equipment and transducer selection, depth, focal zone and gain setting adjust-ment, as well as special considerations for imaging the obese patient.

2016年3月10日 · The ultrasound machine can compensate for the effects of attenuation by amplifying the received signals in two ways, using the overall gain and the time-gain compensation (TGC) controls. The processor can be divided into two individual parts, each having very different tasks to fulfil, and consists of:

You are using a 4 MHz transducer and have adjusted the time gain compensation (TGC) perfectly, as represented by the red TGC line. You are given a new transducer with an unknown frequency. The TGC is then adjusted to create the same image as that obtained using the 4 MHz transducer - this new TGC setting is the purple dotted line.