Image Optimization 5-31
is commonly used to evaluate how fast the tissue is deforming.
TDI QA Workflow:
1. Perform image scanning on cardiac muscle, freeze the image and select a range of images for
analysis, or select a desired cine loop from the stored images.
Tip:
Images from the current scan session (already in freeze mode) or from a saved image loop can
be used for TDI QA.
TDI QA is only available if the user has selected an image loop. If the user has selected a
saved still image (just one frame), the TDI QA function is not available.
2. Touch [TDI QA] on the TVI touch screen page to activate the TDI QA function, or press the user-
defined key for TDI QA directly.
3. Mark out the part of interest.
4. Select the quantitative analysis curve: touch [Speed] / [Strain Rate] / [Strain] to select.
5. Save the curved image, export the data and perform parameter analysis.
6. Touch [Exit] to exit the TDI QA function.
5.9.4.1 TDI QA Screen Description
TDI QA Screen (using the Speed – Time curve as an example)
1 - TVI Cineloop window
Sample area: indicates the sampling position of the analysis curve. The sample area is color-coded, 8
(maximum) sample areas can be indicated.
2 - B Cineloop window
Tip:
The images in the TVI cineloop window and B cineloop window are the frozen image of the
same moment. Roll the trackball to review the images in the two cineloop windows.
Sample areas are linked in the TVI cineloop window and B cineloop window.
3 - Displays the analysis curve
The Y-axis represents the speed (unit: cm/s). [In the Strain Rate – Time curve, the Y-axis
represents the strain (%). In the Strain – Time curve, the Y-axis represents the strain rate (1/s).]
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