Clarius Classroom

Adjusting Gain and Depth

Shelley Guenther

Adjusting depth is an important first step in optimizing your image. If the depth is too shallow pathology may be outside the field of view and missed. When the depth is set too deep the area of interest is small and it is difficult to evaluate for pathology. Once the image depth is optimized,, the Gain, or overall brightness of the image may need to be adjusted. When an image is under gained structures are dark, details are lost. In an over gained image false echoes will appear in structures making it difficult to differentiate pathology.

Specialties: Feature
Applications: Feature
hi i'm shelley and i'm going to show you how you can make a couple of easy adjustments to your ultrasound image using gain and depth now gain is referred to as the overall brightness of your image and because every patient is different and sound interacts differently in every patient you may have to make this adjustment when you start scanning so in this situation i've got a picture of a bladder a very full bladder and you can see that the bladder should be black because it's fluid filled it's a little bit too bright and i'm seeing some echoes inside that i know are artifact so the way i can deal with that is to decrease the overall gain by holding my finger on the screen and just lowering the gain i've gotten rid of a lot of those echoes in there now there is the chance that you could go too low in which case you're going to lose a lot of information about surrounding structures or you can go too high where everything just looks full of artifact so it's a matter of just finding the right amount the other thing you can do is adjust near and far again so near to the transducer or far from it and again if i just want to increase my gain at the top of the image i can do that or decrease it that clears up the echoes in the bladder and at the bottom i've got some artifact down here too so i can just adjust the lower gain while keeping a consistent image in the middle now the other thing we want to talk about is depth clarius has worked hard to make sure that the depth comes up in the appropriate preset in the range of where it should be but again everybody's built a little bit differently so you may have to make adjustments to this to adjust the depth it's just a simple swipe up and down now you want to make sure that you have your region of interest in the center of the screen if i decrease my depth by dragging my finger down i'm missing out on the lower part of the bladder conversely if i swipe up i can see the bladder but it's way at the top of the screen and we're getting a whole lot of nothing at the lower half of the screen here so again it's a happy medium you want to have it right in the middle for a nice crisp diagnostic image

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