Image Optimization 5-31
z
Tissue Velocity Doppler Imaging (TVD): this imaging mode provides quantifiable
direction and velocity information about the tissue.
z
Tissue Velocity M Imaging (TVM): this function assists in observing the cardiac
motion through a direct angle. TVM mode is also called Color Tissue M mode
which has been introduced in the Color M mode chapter. See “5.7 Color M
Mode” for details.
TDI imaging and TDI QA are options.
Only the phased probe in cardiac exam mode supports the TDI function.
5.9.1
Basic Procedures for TDI Imaging
Press user-defined key for TDI on the control panel in real-time scanning to enter the
modes(Assign a key as user-defined TDI: the setting path is "[Setup]
Æ
[System]
Æ
[Key Config]", see “12.1.6 Key Configuration” chapter for details), or tap [TDI] on
the touch screen directly:
h
In B or B+Color mode: to enter TVI Mode, TVI mode parameters will be
displayed on the touch screen.
h
In Power mode: to enter TEI Mode, TEI mode parameters will be displayed
on the touch screen.
h
In PW mode: after pressing the [TDI] user-defined key, press <PW> or
<Update> to enter TVD Mode, TVD mode parameters will be displayed on
the touch screen.
h
In M mode: after pressing the [TDI] user-defined key, press <M> or
<Update> to enter TVM Mode, TVM mode parameters will be displayed on
the touch screen.
Switching between the TDI sub-modes
In TDI mode, press <Color>, <Power>, <M> or <PW> to switch between the modes.
Exit
TDI
z
Press [TDI] user-defined key to exit TDI mode and enter general imaging modes.
z
Or, press <B> on the control panel to return to B mode.
5.9.2
TDI Image Parameters
In TDI mode scanning, the image parameter area in the top-right corner of the screen
displays the real-time parameter values as follows:
z
TVI/TEI
Parameter
F G
PRF
WF
Meaning
Frequency Gain PRF Wall
Filter
z
TVD
Parameter
F G
PRF
WF SVD SV Angle
Meaning
Frequency Gain PRF Wall Filter SV Position SV Size Angle value
5.9.3
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.
