TELEMED
Echo Wave A Software User Manual
Ver. 1.2.1
2020.07.02
Page 14 of 25
Caution
When scanning, please observe the scan direction marker
that is painted on the ultrasound image
in order to avoid any possible confusion.
7.1.7. Frequency
Description
Frequency is a characteristic that defines the resolution of ultrasonic signal. Higher frequencies
increase resolution of the incoming ultrasonic signal but reduce the visibility of examined tissues at greater
depths. In order to examine tissues found at small depths use larger frequencies and when examining
tissues at greater depths it is better to use small frequencies.
Values
The frequency values available depend on the type of probe used. Measurement units used -
megahertz (MHz).
Adjustment
Click “Frequency” button and do sweeps on ultrasound image.
7.1.8. Frame Averaging
Description
Frame averaging is an image processing technique that allows you to obtain smoother, softer
images and reduces ultrasound image noise by averaging several sequential ultrasound image frames
together. Use higher frame averaging values to obtain smoother images.
Values
The values available may differ depending on the type of probe but the following values are usually
available: Off, 2, 3, ..., 8. These values mean the number of averaged frames. “Off” means that frame
averaging is not used.
Adjustment
Click “Frame Averaging” button and do sweeps on ultrasound image.
Caution
Please note that higher frame averaging values not only make ultrasound images smoother but may
also hide small image details. Frame averaging may slightly decrease the frame rate.
7.1.9. Rejection
Description
Ultrasonic signal rejection is a processing that changes a range of the values of the ultrasonic signal
received. Generally speaking, this processing is used to reduce visibility of noises on ultrasonic images.
