6 - 30 Operator’s Manual
6 Image Acquisition
6.10.3 TDI Quantitative Analysis
TDI is provided for reference, not for confirming a diagnosis.
To perform the strain and strain curve, the ECG curve is in need in case of the deviation in curve.
It is about analyzing the data of TVI imaging and measuring the velocity of the myocardium with
the cardiac cycle.
Here are three types of curves to perform the quantitative analysis:
• Velocity-time curve
• Strain-time curve
• Strain rate-time curve
– Strain: Deformation and displacement of the tissue within the specified time.
– Strain rate: speed of the deformation, as myocardial variability will result in velocity
gradient, strain rate is used commonly to evaluate how fast the tissue is deforming.
1 TDI review Sampling area: indicates the sampling position of the curve. The
sampling lines are marked with color numbers. It can mark 8 ROIs at
most.
2 2D grey image
review
• Use 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.
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