SAEVO EVUS 8, Руководство пользователя

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6 Acquiring Images
Basic User Manual 61
A flow with slow velocity and small rate can be displayed in PDI. Therefore, a flow with a higher sensitivity can be
detected without overlaying any flows with high velocity.
The direction of flow, the flow velocity and flow properties cannot be reflected in the PDI-Mode image.
Perform the following steps to acquire PDI-Mode images.
1. Optimize a B-mode image.
2. Select the
DPI key on the control panel to enter the PDI Mode.
0
5
10
15
1 .0
8 6
2 55
1 /50
7 0
2 .2
2D Imaging
Color Flow ROI
PRF
FPS
GN
PWR
FRQ
PWR
FRQ
GN
WF
D/G
I/P
D
C/P
C Map/DPDI WF Line Density
Sec.Width Sec.Pos Power%
B Reject
Frequency
S
Figure 6-6 PDI-Mode Imaging Screen
3. Adjust color flow ROI.
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Move the trackball to position color flow ROI.
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Select the Set key to adjust the size of color flow ROI.
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Select the Set key to reposition color flow ROI.
4. Optimize the PDI-mode image. For details, refer to Section 6.3.4 Optimizing C/PDI/TDI Mode Images.
5. Select the
DPI key again to exit the screen.
6�3�3 TDI Mode
NOTE:
TDI imaging is only applied to cardiac applications by using the phased array probes.
TDI (Tissue Doppler Imaging) is a color flow imaging technique which detects the low frequency signal reflected
from the cardiac muscle. TDI provides the flow information of velocity and direction for cardiac movement.
TDI uses the low velocity and the high amplitude adjusted from the wall filter to create a color-coded tissue
imaging.
Perform the following steps to acquire TDI-mode images.
1. Optimize a B-mode image.
2. Select
the TDI key on the control panel to enter the TDI mode.