5-22 Image Optimization
5.10 TDI
TDI is provided for reference only, not for confirming a diagnosis.
TDI (Tissue Doppler imaging) mode is intended to provide information of low-velocity and
high-amplitude tissue motion, specifically for cardiac movement.
There are 3 types of TDI mode available:
Tissue Velocity Imaging (TVI): This imaging mode is used to detect tissue movement
with direction and speed information. Generally the warm color indicates the
movement towards the probe, while the cool color indicates the movement away from
the probe.
Tissue Energy Imaging (TEI): This imaging mode reflects the status of cardiac
movement by displaying the intensity of tissue, the brighter the color the less the
intensity.
Tissue Velocity Doppler Imaging(TVD): This imaging mode provides direction and
velocity information of the tissue quantificationally.
Only probe 35C20EA can be applied for TDI function.
5.10.1 Basic Procedures for TDI Imaging
Enter TDI
Click [TDI] on the image menu or press the user-defined key on the control panel in
real-time scanning to enter the modes:
In B or B+Color mode: to enter TVI Mode.
In Power mode: to enter TEI Mode.
In PW mode: to enter TVD Mode.
Switching among the TDI sub modes
In T
DI mode
, press <
Color> or <P
W
> or click [Po
w
er
] to
sw
itch
bet
ween t
he
m
o
des.
Exit TDI
Press <TDI> to exit 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 scanning, the image parameter area in the upper right corner of the screen
displays the real-time parameter values as follows:
TVI/TEI
TVD
5.10.3 TDI Image Optimization
In each TDI mode, parameters that can be adjusted are similar to those in the color flow
modes (Color, PW, and Power); please refer to the relevant sections for details.
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