All Dawei veterinary ultrasound machines come with gain control, and the adjustment methods vary by model. Gain is one of the most commonly adjusted scanning parameters. If you’re not familiar with these parameters, it’s recommended not to adjust them arbitrarily, as they significantly affect image clarity. Today, we’ll explain the “gain” parameter.
Most people think of “gain” as a brightness adjuster. Increasing the gain does make the image brighter, but understanding how it actually works can be helpful. Gain is a parameter that uniformly amplifies the ultrasound signal. When you adjust the gain, the screen appears brighter because the image becomes uniformly whiter.
However, it’s important not to over-adjust the gain. Setting the parameter too high can cause the image to wash out, losing detail or creating artifacts.
Imaging Deep Structures in Veterinary Ultrasound
When scanning deeper areas, you’ll need to lower the “frequency” parameter (for an explanation of frequency, see: How Does the Frequency of a Veterinary Ultrasound Probe Affect Imaging?). However, this may reduce image clarity. In such cases, you can appropriately adjust the “gain” to uniformly amplify the ultrasound signal and improve image quality.
Poor Probe Contact in Veterinary Ultrasound
During examinations, the probe must be in close contact with the area being scanned, as air gaps can severely degrade image quality. For external scans, clean the skin of any debris (and clip hair if necessary), and apply coupling gel to both the probe and the area to minimize interference with the ultrasound signal. For rectal scans, remove as much fecal matter as possible, use ample lubricant as a contact medium, and ensure the probe is pressed firmly against the rectal wall.
Adjusting Veterinary Ultrasound Display Brightness
In bright environments, you may find the screen hard to see clearly. In such cases, adjust the screen brightness for better visibility. If you try to brighten the image by adjusting the gain instead, it may result in reduced clarity.
Increasing Gain to Reduce Shadows in Veterinary Ultrasound
When scanning dense tissues like bladder stones or areas with gas, shadows may appear in the image, affecting quality and making accurate judgment difficult. To address this, change the scanning position or avoid feeding the animal before the exam to reduce gas.
Shadows may also appear as edge artifacts around round structures. If you frequently encounter this issue, feel free to contact us.
When Should You Adjust the Gain During Veterinary Ultrasound Use?
Generally, when you purchase one of our veterinary ultrasound machines, we preset all parameters before shipping. No adjustments are needed during use. However, if the image appears too dark even after adjusting the brightness settings, you can increase the gain to optimize brightness while preserving detail.
Post time: Aug-07-2025