Image Optimization 5-35
NOTE:
Move the trackball; the images in TDI review window and 2D review window are reviewed
synchronously, since the two images are frozen at the same time.
ROI movement is linked between the TDI (Tissue Doppler Imaging) review window and the 2D
imaging reviewing window.
3---Display analysis curve
Y-axis represents the velocity (unit: cm/s) [in strain-time curve, Y-axis represents the strain (%);
in strain-time curve, Y-axis represents the strain (unit: 1/s)].
X-axis represents time (s);
Frame mark: a white straight line perpendicular to the X-axis, and can be moved left and right
by rotating the track ball.
Click the check box in front of the ROI to display or hide the analysis curve.
You can get the current X/Y axis value by moving the cursor onto one point on the curve; and if
you press <Set> at this time, the frame marker will move to the spot.
4—ECG display area
5.10.4.2 Basic Operations of TDI Quantitative Analysis
ROI Settings
It is the sampling scope of the quantitative analysis.
One image can save 8 ROIs at most, and draw the corresponding curve in image area. Each ROI has
different color; the corresponding curve is painted with each color.
Procedures:
Standard ROI: add ROI automatically after capturing the area. ROI size is decided by “Standard
Height/Width/Angle”.
Ellipse ROI: roll the trackball to perform the ellipse ROI after capturing the area.
Standard ROI
1. Tap [Standard ROI]. The standard ROI is displayed when the cursor moves into the review area
(TDI review window or 2D grey review window).
2. Review to the desired frame.
3. Roll the trackball to one cine review window.
4. Press <Set>. The system updates the analysis curve and the data instantly.
Press <Clear> to remove the last ROI.
Ellipse ROI
1. Tap [Ellipse ROI]. The ellipse ROI is displayed when the cursor moves into the review area (TDI
review window or 2D grey review window).
2. Review to the desired frame.
3. Roll the trackball to one cine review window.
4. Press <Set> to confirm the start point, and roll the trackball and press <Set> to confirm the next
point. Press <Set> to complete the drawing. Press <Clear> to cancel the active ROI.
Press <Clear> to remove the last ROI.
Standard Height/Standard Width/Standard Angle
Adjust the hard key below the touch screen to adjust the ROI size: standard height, standard width and
standard angle.
Strain Distance
Sample distance for calculating deformation. Rotate the knob under [Strain Dist.] on the touch screen to
select the corresponding value for Strain – Time curve or Strain Rate – Time curve.
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