Exporting ROIs and Multi-ROIs to Meshes

Regions of interest and multi-ROIs can be exported as meshes either normally, with sampling, or confined within a cubic structure, as shown in the following illustration. Meshes may be more efficient for visualization and can provide additional parameters for further analysis.

Mesh types

Mesh types

In some cases, duplications of values may occur when a multi-ROI with scalar values is exported as a mesh.
Export options
  Description
Normal mesh Surfaces are tessellated or broken down logically into a series of small triangles or facets. You should note that each voxel value within the region of interest or multi-ROI is analyzed when it is exported without sampling. Modifying the values for any axis will generate a mesh representing less vertices.

Sampling… Determines the sampling rate along each axis to generate the mesh. each voxel value is analyzed when the sampling rate is set at 1. At a sampling rate of 4, one of every four pixels will be sampled. The use of simplified models is one way to enable real-time, interactive visualization of large, complex meshes.

Cubic mesh Surfaces are tessellated or broken down logically into a series of small triangles or facets confined with a cubic structure. You should note that smooth and rounded edges can be lost when exporting in this format.
  1. Select the required region of interest or multi-ROI in the Data Properties and Settings panel.
  2. Click the To a Mesh button in the Export box on the ROI Tools panel.

  3. Do one of the following:
    • Choose Normal in the drop-down menu to export a normal mesh without sampling.

      When processing is complete, the exported mesh appears on the Data Properties and Settings panel (see Mesh Properties and Settings for information about meshes).

    • Choose Normal (Sampled) in the menu options to export a normal mesh with sampling.

      The Export as Sampled Mesh dialog appears.

      Select the sampling values for the X, Y, and Z axes and then click the OK button.

      When processing is complete, the exported mesh appears on the Data Properties and Settings panel (see Mesh Properties and Settings for information about meshes).

    • Choose Cubic in the drop-down menu to export a cubic mesh.

      When processing is complete, the exported mesh appears on the Data Properties and Settings panel (see Mesh Properties and Settings for information about meshes).