Volume segmentation: ReferenceTopic number: 1505496675098

Undo or redo any operation that changed the content of masks or the number of masks. Applies to cumulative changes on all masks in the currently active volume.

Shows or hides all masks and their markups

• If selected, all masks and their markups are shown (with respect to the individual mask visual appearance settings)
• If unselected, all masks and their markup are hidden

Opacity

Steers the opacity of all sculpted masks within 3D renderers

Enable or disable table removal.

• If enabled, creates a table removal mask in the Mask Objects section.
• If disabled, removes the table removal mask.

This tool is available only for CT data, and is enabled by default.

Enable or disable bone removal.

• If enabled, creates a bone removal mask in the Mask Objects section.
• If disabled, removes a bone removal mask.

This tool is available only for CT data, and is disabled by default.

• If enabled, swaps the bone removal mask in the Mask Objects section with a bone removal + fragment mask
• If disabled, swaps the bone removal + fragment mask in the Mask Objects section with a bone removal mask. If the bone fragment removal is enabled it will automatically be disabled as well

WARNING! The automated bone removal algorithm and the bone fragment removal algorithm are intended to facilitate segmentation of bony structures from abdominal and extremity CT angiography data. The algorithm is not designed for and must not be relied upon for CT angiography data from the head and neck region. The automate bone removal algorithm and the bone fragment removal algorithm are critically dependent on factors such as anatomy covered, acquisition parameters, contrast intensity, patient morphology and pathology, and can result in an unsatisfactory segmentation of the 3D model. It is the responsibility of the user to verify and possibly refine the segmentation result if needed.

Add a mask

When you add a mask you can select a tool to use to create the mask and you can specify the appearance of the mask.

The first three buttons that follow steer the appearance of the current selected mask in 2D renders.

Display or hide mask

• Active—current mask is visible
• Inactive—current mask is hidden and filled contour and empty contour are inactive

Display Filled contour

• Active—current mask is shown filled
• Acts like a toggle button with the empty contour button

Display Empty contour

• Active - current mask is only shown with outline
• Acts like a toggle button with the Filled contour button

Display in 3D

Steers the appearance of the current selected mask in 3D renders

• Active—current mask is visible within 3D renders
• Inactive—current mask is sculpted within 3D render (similar to table and bone removal). Hides data on 3D and MIP viewports.

Display info

Activates or deactivates the display of the measurements information (values, deviation, and axis) for the current selected mask within the viewports

Lung nodule tool

Lasso tool

Pick tool

Smart brush

Magnetic lasso tool

Threshold tool

Automatic volume measurement tool

Create or edit a mask using the automatic volume measurement tool

Dilate

Dilation is available only as an editing tool. Whenever dilation is applied, the morphological operation dilation (with a size of one) is performed on the selected mask. This means that the selected mask gets bigger.

Erode

Erosion is available only as an editing tool. Erosion can be applied on all masks. Whenever erosion is applied, the morphological operation erosion (with a size of one) is performed on the selected mask. This means that the selected mask gets smaller.

Invert

Inversion is available only as an editing tool. Invert inverts the content of the selected mask, so that all voxels belonging to the mask will not belong to the mask after the invert operation, and vice versa.

Multiple masks

If you select multiple masks (using Ctrl or Shift), the editing area is replaced with the tools listed previously. Depending on the selection, not all tools are available. For example, the delete mask is not available if a table removal, bone removal, or bone fragment removal mask is part of the selection. The subtraction action is available only if the selection contains two masks.

Combine selected masks

Creates a new mask (with the default name “Union…”) containing all voxels of all selected masks. The mask automatically shows up in the list of masks. The multi selection of masks is kept.

Subtract first mask from second

Creates a mask (with the default name Subtract…) containing all voxels of the second mask that are not part of the first mask. The mask automatically shows up in the list of masks. The multi-selection of masks is kept.

Subtract second mask from first

Creates a mask (with the default name Subtract…) containing all voxels of the first mask that are not part of the second mask. The mask automatically shows up in the list of masks. The multi-selection of masks is kept.

Delete masks

Removes all selected masks. No mask is selected afterward.

Calculated details

Statistical details for the current mask. These details are recalculated when a mask is edited.