Youkey D8 - Page 35

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 D8 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.