Measuring and segmenting volumes using the smart brush toolTopic number: 1509391352176

You can use the smart brushes to add or remove paint from any parts of the volume that you want to mask.

Prerequisite

The volume segmentation tools are available only when at least one volumetric series with a built volume is present in the current presentation group. This can be achieved, for example, by selecting a MPR hanging protocol, or by switching the render type of one of the given viewports to MPR or 3D.

  • For the Smart 3D Brush, painting is done by a sphere
  • For the Smart 2D Brush, painting is done by a cylinder with the height of the original slice thickness of the dataset.

 

To measure and segment volumes using the smart brush tool
  1. On a CT volume dataset, in the Clinical sidebar, click Volume segmentation. Volume segmentation
  2. To remove bone structures or fragments, click the Bone removal button or Bone fragment removal button. Clicking the button again displays the removed bone structures or fragments.
  3. To edit a mask, under Mask Objects, select the mask and under Edit selected mask, click 2D or 3D.
  4. To modify the size of the brush, drag the brush slider or press Shift while rolling the mouse wheel.
  5. To add or remove area from the mask, drag the mouse.

    • When the mouse is within the current mask, the tool acts as "remove brush" and removes the marked area from the current mask

    • When the mouse is outside the current mask, the tool acts as "add brush" and adds the marked area from the current mask.

    Tip:

    If a smart brush tool is active and the Shift key is pressed and held the tool changes to its counterpart (for example, the additive smart brush tool changes to the subtractive smart brush tool). When the Shift key is released the tool switches back to the original selected tool. This means you can start adding although the mouse is within the current mask.