Youkey Q7 Instructions For Use Manual page 35

Velocity
Resume Showing the velocity range of blood flow, for this product, is actually regulating the
measurable range of blood flow velocity.
Effect After adjustment, the color blood flow image can be displayed more clearly and
accurately.
A lower velocity range should be used to measure low velocity blood flow, and a higher
velocity range should be used to measure high speed blood flow.
Influence Aliasing is easy to occur when measuring high-speed blood flow using a lower
velocity range.
If the speed scale is too high, it will result in the loss of smaller blood flow signals.
Steer
Resume Used to tilt left and right color blood flow images to obtain more
information without moving the probe.
Effect Changing the incident direction of the acoustic beam in color mode, thus
changing the angle between the acoustic beam and the direction of blood
flow, is only effective for the linear array probe.
Wall filter
Resume The low frequency noise caused by vessel wall vibration is filtered out to display the
image information effectively. This function is used to adjust the cut-off frequency
of the wall filter in Q7 pocket ultrasonic system.
Effect May cause loss of blood flow signals.
Color frequency
Resume Toggles the probe frequency in Doppler mode.
Effect The higher the frequency, the higher the resolution and sensitivity, but the lower the
penetration force.
Persistence
Resume The B images of adjacent frames are averaged to optimize the images.
Effect Reduce the image noise, optimize the image, make the image more delicate, may
cause the loss of specific information.
Priority
Resume Used to set the level of blood flow display, select the preferred black-and-white or
color blood flow display.
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