6 - 22 Operator’s Manual
6 Image Acquisition
•TVD
•TVM
Image parameters combine the parameters of TVI mode and M mode.
In each TDI mode, the parameters that can be adjusted are similar to those in the color flow modes
(Color, PW, and Power). See the relevant sections for details. The following introduces the specific
items in TDI mode.
Tissue State
This function is used for fast image optimization.
6.9.3 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.
Items Meaning
FFrequency
GGain
WF WF (Wall Filter)
PRF Pulse Repetition Frequency PRF
SVD SV depth
SV SV Size
Angle Angle
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