5-38 Image Optimization
PW mode: Press user-defined <TDI> key, and then press <PW> or <Update> to enter TVD.
The parameters of TCD are displayed on the touch screen.
M mode: Press user-defined <TDI> key, and then press <M> or <Update> to enter TVM.
The parameters of TVM are displayed on the touch screen.
Switching between the TDI modes
In TDI mode, press <C>, <Power>, <M> or <PW> to switch among the modes.
Exit TDI
Press <TDI> to exit from TDI mode and enter general imaging modes.
Or, press <B> on the control panel to return to B mode.
5.10.2 TDI Image Parameters
In TDI mode scan, the image parameter area in the right corner of the screen will show the real-time
parameter values as follows:
TVI/TEI
Items
F
G
WF
PRF
Meaning Frequency Gain Color Wall Filter Pulse Repetition Frequency PRF
TVD
Items
F
G
WF
PRF
SVD
SV
Angle
Meaning Frequency Gain
WF (Wall
Filter)
Pulse Repetition Frequency
PRF
SV
depth
SV
Size
Angle
TVM
Image parameters combine the parameters of TVI mode and M mode.
5.10.3 TDI Image Optimization
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
Description
This function is used for fast image optimization.
Operations
Adjust using the [Tissue State] item on the touch screen.
3 levels are provided: L, M, H.
5.10.4 TDI Quantitative Analysis
CAUTION:
TDI is provided for reference, not for confirming a diagnosis.
NOTE:
To perform the srain and strain curve, the ECG curve is in need in case of the deviation in
curve.
TDI quantitative analysis is an option.
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:
