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Volume Mode
9.4.4.1.1 Threshold Control in Gray Render Mode
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Select the render algorithm desired:
Surface Texture:
A surface will be displayed in "texture" mode. The gray values of the
Texture:
surface are identical with the gray values of the original scan.
Light: Light
A surface will be displayed in "light" mode. Structures close to the viewer
are displayed bright; structures more distant from the viewer are shaded.
Application:
The surface to be displayed has to be surrounded by hypoechoic
structures (e.g. liquids).
Surface Smooth:
The surface is displayed in a smoothed "texture" mode The gray values of
Texture:
the surface are identical with the gray values of the original scan.
Gradient Light:
The surface will be displayed as if being illuminated from a spot light
source.
Application:
The surface to be displayed has to be surrounded by hypoechoic
structures (e.g. liquids).
Maximum Mode:
The maximum gray values of the ROI are displayed.
Application:
Representation of bony structures.
Minimum Mode:
The minimum gray values of the ROI are displayed.
Application:
Representation of vessels and hollow structures.
X-Ray Mode:
Representation of all gray values within the ROI.
Application:
Tissue block with tumor or similar.
The software module allows selection of 2 modes which are simultaneously calculated. Always
the actual selected mode is displayed with 100%. With the [Mix]-key one can mix between the
chosen modes. Modes can be selected without restriction, except the Light mode, which
combines only with Surface display. Always select 2 modes!
Function of the threshold values (Surface Mode only)
In Surface mode, it will normally be necessary to adjust the low threshold for the border
recognition of the surface. These threshold values do not apply for the Transparent modes!
Threshold low (Reject): Normally this threshold always has to be adjusted for a good
appearance of the 3D surface image. By changing the [TH.low] all echoes below the level are
enhanced in pink color for a short interval.
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4
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