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Segmentations allow a customized 3D display.To start the tool press " Edit Segmentations"
If you donĀ“t see this button please see video "Edit Menu Bar"
The scanview module opens.
Upon left click on "Segmentation Mode" a menu appears on the left side offering different tools and a selection of empty segmentation slots+ in different colors.
Select an empty segmentation.
Right-click on the text box to open a drop-down menu with naming presets.
We select "Mandible".
Right-clicking on a segmentation's color box opens a palette to freely choose a color for this segment. Confirm your selection with "OK".
On the lower left side you see the threshold slider.
Moving the sliders will modify the 3D display.
Moving the lower slider upwards will decrease the threshold value of the image.
Use a setting which shows all relevant structures.
Activate the "Move and Turn" tool and move the mouse with the right button pressed to position the 3D view in a way that the part to be segmented, here the mandible, is completely visible from anterior.
Select the "Draw Segmentation Boundery" tool from the left side.
In the 3D view you will see a scissors symbol beside the cursor. With left clicks the mandible will be cut off step by step.
If you do this as near as possible to the segmentated structure you will have less work later on.
Right-clicking closes drawing the line.
Using the right scroll bar or the "move and turn" tool the jaw is now rotated by 90 degrees.
The "Draw Segmentation Boundery" tool is selected again and we draw a boundary around the mandible to let nearly all unwished structures outside the line if possible.
Activate the "Segment Using Flood Fill" tool and click anywhere on the jaw inside the lines.
Within the boundaries set, the jaw will turn into the preselected color.
The segment appears in the preview window on the lower right side. Clicking on the "Clear Segmentation Boundary" button deletes the lines.
Deactivate the "Source Visible in 3D" check box and only the segmentated structure remains visible.
Now we activate the "Segment Using Brush" tool.
Left-clicking on the "Change Brush Size" button toggles the brush size in 3 steps.
In the 3D view, the cursor changes to a circle. Moving the mouse with the right button pressed erases any area from the view you want.
Move and turn the 3D view to get access to further areas to be erased.
Moving and turning the view is important because the brush erases not only the surface but the complete structure behind it.
Parts which have been erased by accident can be restored with the "Undo Segmentation Step" button.
To define a further segmentation choose an empty field. Use the right mouse button to select a name. Here we use "Teeth Mandible".
The "Source Visible in 3D" check box is activated again.
As teeth have a considerably higher density value than bone, the threshold is moved up until the teeth are appopriately visible but do not touch the surounding bone.
The "Segment Using Flood Fill" tool is activated and we click on the detached teeth.
If the threshold value has been selected appropriately the teeth will be colored but not the bone.
However, this is highly depending on the quality of the dataset.
Uncheck "Source Visible in 3D" and the segmented teeth will be shown alone.
The segmentation mode is finished by clicking "Close Module".
In the original view, you see only the default segmentation.
On the left side the "Segmentations" object tree opens.
The default segmentation and all of our user-defined segmentations are listed here.
A full circle in front of a name means that this segmentation is displayed in the 3D view.
You can check and uncheck them with a left click.
This works with every segmentation.
Now you can show every segmentation e.g. in fullscreen mode.