6 Image Acquisition
Operator’s Manual 6 - 17
A purple dot appears inside the smaller ROI indicating the maximum speed position. The
maximum speed-time curve appears at the bottom of the screen. (The speed of purple dot
changes with the time. Besides, horizontal axis represents the time; vertical axis represents the
speed. The ROI speed-time curve appears in purple.)
The starting point and the end point of heart rate cycle and heart rate are also displayed at the
bottom of the screen. If necessary, you can tap [Edit HR] to adjust the starting point and the
end point by using the trackball and <Update> button. Press <Set> key to confirm the position,
and the measurement result of HR is updated.
The result box shows the speed values of the smaller ROI. Max, T-Max, Mean, TAMean,
Median, Turbulen and Size refer to maximum speed of the current frame, maximum speed of
all the frames during T1~T2 time, average speed of the current frame, average speed of all the
frames during T1~T2 time, median speed of the current frame, blood flow dispersion of the
current frame and ROI size.
Move the smaller ROI. The ROI speed-time curve and the values in the result box are updated
in real time.
3. Press <Cursor>. The trackball indication changes to cine-play indication. Move the trackball to
replay the V Flow cine.
Velocity Ratio
Perform the following procedure:
1. Capture image as described in steps 1-5, see “6.5.1 Basic Operations”.
2. Tap [Velocity Ratio] on the touch screen to see number 1 and a cross.
3. Roll the trackball to replay the cine and select a target frame. Press <Cursor> to see the
indication area switch to status.
4. Move the cursor onto the target position in the vessel and press <Set> to anchor. The Velocity
Ratio result window on top of the image then displays the corresponding velocity and dotted
line and another cursor appears.
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