PD Mode
9.2.6
Velocity Range (PRF)
The velocity range of the display is governed by the pulse repetition frequency (PRF).
The
[
PRF
]
control changes the display range. Increasing the velocity range setting will increase the
PRF. As the display scale increases, the maximum Doppler shift information that can be displayed
without alaising also increases.
Touching the flip switch upwards increases the PRF.
Touching it downwards decreases the PRF.
Depending on the box depth the maximum sampling frequency will be automatically reduced.
(If the sampling frequency is not suitable for the selected depth.)
Remarks:
*
The current sampling frequency is displayed on the screen [PRF ...].
*
Changing the velocity range is only possible in write mode !
9.2.7
2D + 2D/PD
The
[
2D+2D/PD
]
function changes the single image display to two simultaneous half frames.
The left frame shows only the 2D mode image.
The right frame shows the 2D mode image also with color information.
Switch on/off this mode by selecting the
[
2D+2D/PD
]
item.
Remarks:
*
Changes are only possible in write mode.
9.2.8 Threshold
After
[
Freeze
]
you can adjust the Power Threshold.
This function eliminates small color noise of motion artifact signals in the Color image.
A small number cuts off fewer signals than a higher number.
Voluson® 730Pro - Basic User Manual
105831 Rev. 0
9-7
Содержание Voluson 730Pro
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