4 - 16 SONOACE PICO Operation manual
▐ PW Spectral Doppler Mode Screen
On the PW Spectral Doppler Mode image, the horizontal axis represents time, and the
vertical axis represents speed (or frequency).
Sample Volume
When Sample Volume is on the blood flow of 2D image, it represents Doppler Spectrum.
Its position is moved with the Trackball and displayed in the xx.x@yy.y mm format. The
format means that the Sample Volume of ‘xx.x’ mm size is located at a depth of ‘yy.y’ mm.
For example, 2.0@16.7 mm means that the Sample Volume of 2.0mm size is located at a
depth of 16.7mm.
▐ PW Spectral Doppler Mode Format Change
Changing PW Spectral Doppler Image Size
To adjust the image position, the 2D image is shown together. The size of the 2D image
and PW Spectral Doppler image can be changed.
Select PW Size in the menu using the Menu dial-button on the control panel. Select the
size (Large, Normal, or Small).
This function is activated in Simultaneous mode is on.
Activating Simultaneous Function
The PW Spectral Doppler image and 2D image can be displayed simultaneously or
separately. This function is not available in Steered CW Spectral Doppler Mode.
Select Simultaneous in the menu using the Menu dial-button on the control panel. If
Simultaneous is selected again when this mode is already on, the mode is deactivated.
Activate the Simultaneous function option by setting Simultaneous function as ‘Allow
2D/PW’ or ‘Allow 2D/C/PW’in the Misc. tab in the Setup window.
NB. Simultaneous function decreases Doppler PRF, thus decreasing the measurable
speed range.
Doppler Baseline Control
Press the Flexible soft button [2] Baseline and then use Menu. Turn the Menu dial-
button clockwise to raise the Baseline, and vice versa.
Doppler Axis Invert
Press the Flexible soft button [4] Invert on the control panel. The ‘+ velocity value’ and ‘-
velocity value’, shown at the Doppler axis, change positions.
Loop Format Change
Select Loop Format in the menu using the Menu dial-button on the control panel. ‘Hor’