GE Voluson S6 Basic User Manual page 205

8.6.2 TD Operation
8.6.2.1 TD Box Position and TD Box Size
8.6.2.2 TD Gain Control
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4
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Changing the Gain, Quality, PRF and 2D +2D/TD is only possible in scan mode.
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The [TD] control is only visible if the selected probe is capable of the Tissue mode.
The TD operations:
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'TD Box Position and TD Box Size'
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on page 8-29
'TD Gain Control'
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on page 8-38
'Quality'
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'Velocity Range (PRF)'
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on page 8-37
'Invert'
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on page 8-30
'2D + 2D/TD'
In 2D imaging the relationship between 2D frame rate, line density, and field-of-view are well
known factors to be considered to obtain optimum 2D-Images. Similar relationships exist in
Color-Imaging. On the TD Submenu the selection of the line density adjusts the balance
between the 2D-Line Density and the Tissue mode line density. The available values are scan
head-dependent.
The ability to change the TD Box size and position provides flexibility in TD Imaging. The
trackball changes the TD Box size and position.
Adjust the TD Box position on the 2D image with the trackball. (in Single, Dual, or Quad Mode)
← → TD box horizontal position
↑ ↓ TD box vertical position
The box is adjustable within the entire 2D image area.
The upper trackball key changes between TD Box position and TD Box size and vice versa.
↑ decrease the vertical TD box size
↓ increase the vertical TD box size
→ increase the horizontal TD box size
← decrease the horizontal TD box size
TD Gain must be adjusted properly to ensure that continuous flow is displayed. TD Gain
should be set as high as possible without displaying random Color speckle. If you set the TD
Gain control too low, the lack of sensitivity will make it difficult to detect small abnormalities in
flow and will possibly result in an underestimation of the large flow disturbances.
on page 8-29
on page 8-40
Doppler Modes
8-29