•
'Dynamic Control'
on page 6-22
•
'Optimized Tissue Imaging (OTI)'
on page 6-22
•
'Enhance'
on page 6-22
•
'Reject'
on page 6-22
•
'Line Density'
on page 6-22
•
'Gray Map'
on page 6-22
•
'Utilities'
on page 13-2
6.4.1 Persistence Filter
“Persistence” is a frame averaging function that allows elimination of image
speckle from 2D images. With a higher persistence setting more frames are
averaged. Persistence 1 to 8 can be set in the 2D Sub menu in scan mode.
The Persistence filter is displayed in the Image Info area on the screen.
Remark:
This function is not available if CrossBeam Compound Resolution Imaging (XBeam CRI)
(
'CrossBeam Compound Resolution Imaging (XBeam CRI)'
on page 6-9
)
is switched on.
6.4.2 Line Filter
The “Line Filter” smoothes the image in the direction parallel to the probe surface (or in a
curve). How much filtering is used can be adjusted by the user, more filtering reduces noise at
the expense of detail in the image.
Three steps are provided: off, low, high
off: no filtering low: filtering of two lines (12,5/75/12,5%) high: filtering of three
lines (25/50/25%)
Remark: This function is not available if CrossBeam Compound Resolution Imaging (XBeam
CRI)
(
'CrossBeam Compound Resolution Imaging (XBeam CRI)'
on page 6-9
)
is switched on.
6.4.3 CRI Filter
If this filter is set to “8”, the XBeam CRI-image is smoothed. CRI Filter setting “off” leads to a
sharper impression of the XBeam CRI-image.
Eight settings are provided: 1, 2, 3, 4, 5, 6, 7, 8
Remark:
This function is only available if CrossBeam Compound Resolution Imaging (XBeam CRI)
(
'CrossBeam Compound Resolution Imaging (XBeam CRI)'
on page 6-9
)
is switched on.
This process smoothes the final image (structures can be smeared out).
For diagnosis, the Region of Interest must be viewed without CRI filter as well. A smoothed
image could lead to false diagnosis!
2D Mode
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4 6-21
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