Acclarix AX3 Series Diagnostic Ultrasound System User Manual Imaging
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5.2 Color Mode
5.2.1. Color Mode Variants
The system supports 3 types of Color Doppler imaging:
Color (Color Doppler): This is velocity Color Doppler that shows direction and velocity of flow.
Different colors represent different velocities and positive flow has different colors than
negative flow.
PDI (Power Doppler Imaging): PDI shows the power, or intensity, of the Doppler signal. PDI is
typically more sensitive to low levels of flow, but cannot distinguish the velocity or direction of
the flow.
DPDI (Directional Power Doppler Imaging): This is similar to DPI in that it shows the power of
the Doppler signal instead of the velocity. However, it does map positive flow to different colors
than negative flow.
5.2.2. Using Color Mode
1. Perform the image scanning to get a good image in B mode;
2. Press <Color> to enter B+Color mode and display ROI box;
3. Adjust the size and position of ROI box.
Presses on <Set> switch between the status of adjusting the size and position of ROI box. Use
trackball to adjust.
4. Press PDI, DPDI or Color mode key on the touch screen to switch Color Doppler modes when
necessary;
5. Adjust image parameters to optimize the Color image.
5.2.3. Color Image Optimization
The following touch controls can be used to optimize the Color image.
A set of radio-buttons display the color modes that are available
on the current transducer, and let you switch between them.
See section 5.4.1 for details.
Scale adjusts the range of velocities that are displayed. Upward
presses increase scale and downward presses decrease it. It is
available in Velocity, PDI, and DPDI. It is not available in
Freeze/Cine.
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