9 Contrast Imaging
Operator’s Manual 9 - 5
1. Perform image scanning, freeze the image and select a range of images for analysis; or select a
desired cine loop from the stored images.
The system set the starting time and ending time of the cine to be first frame and last frame of
QA analysis range.
2. Review the image to a desired frame.
3. Tap [Contrast Imaging QA] to activate the function.
4. Mark out the interested part (ROI).
Up to 8 ROIs can be saved on the reference image, with the corresponding eight traces plotted
simultaneously on the graph. Each ROI display has a different color, and its corresponding
trace data is plotted using that same color.
a. Use [ROI Type] to select the method for determining the shapes of the sample area: Trace
ROI and Ellipse ROI.
The cursor is evolved in the image review area.
b. Use the trackball to position the caliper on the reference image at the start point. Press
<Set> to fix the start point.
– Press <Clear> key to clear out the last ROI.
– Tap [Delete All] on the touch screen to clear out all ROIs.
The corresponding traces for the deleted ROIs are erased from the plot.
– Tap [Copy ROI] to create a new ROI similar to the current or latest added ROI
5. Tap [Motion Tracking] to enable the Motion Tracking function.
This function provides a motion compensated ROI as precise time-intensity information can be
acquired using active tracking. It can enhance the calculation accuracy as reducing the impact
of probe or patient respiratory movement.
6. If necessary, tap [Fit Curve] to perform curve fitting on the time-intensity curve, where color of
the fitted curve is consistent with color of the current ROI curve.
The system can calculate characteristic parameters according to curve fitting formula and data,
display fit curve for time-intensity curve, and perform data analysis on time-intensity curve for
data table.
– Tap [Raw Curve] to hide/display raw curve.
Trace ROI Follow the steps below:
1. Press <Set> key to fix the starting point.
2. Press <Set> key, and use the trackball to depict the ROI.
Press <Clear> to cancel the last point.
The system automatically links the start point to the end point by drawing a
straight line between them.
3. When a suitable ROI has been drawn, confirm the ROI by double pressing <Set>.
Ellipse ROI Follow the steps below:
1. Use the trackball to position the caliper on the reference image at the start point.
Press <Set> to fix the start point.
2. Trace the outline of the desired ROI by moving the cursor with the trackball.
3. Press <Set> to fix the end point, and use trackball to depict the ROI. When a
suitable ROI has been drawn, confirm the ROI by pressing <Set> key.
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