Mindray Eagus TEX21 - TDI Mode Image Scanning; TDI Mode Image Parameters; TDI Quantitative Analysis

6 - 16 Operator’s Manual
6 Image Acquisition
6.8.1 TDI Mode Image Scanning
Perform the following procedure:
1. Select [TDI] button to enter the TDI mode.
– In B or B+Color mode: to enter TVI Mode, parameters of TVI mode will be displayed.
– In Power mode: to enter TEI Mode, parameters of TEI mode will be displayed.
– PW mode: select [TDI] button and then select the PW mode button or [Update] button to
enter TVD. The parameters of TVD are displayed.
– M mode: select [TDI] button and then select the M mode button or [Update] button to
enter TVM. The parameters of TVM are displayed.
2. Adjust the image parameters to obtain optimized images.
3. Select [TDI] button to exit from TDI mode and enter general imaging modes.
Or, select the B mode button to return to B mode.
6.8.2 TDI Mode Image Parameters
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.
6.8.3 TDI Quantitative Analysis
CAUTION
TDI is provided for reference, not for confirming a diagnosis.
NOTE:
To perform the strain and strain curve, the ECG curve is in need in case of the deviation in curve.
TIP:
• The current image (in frozen state) and the saved image can be used in the quantitative
analysis.
• Only after the user chooses the image review, the quantitative analysis is available.If the user
chooses the static image (only one frame), the quantitative analysis is not available.
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.