Exporting ROIs to Meshes
Regions of interest 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 (see Working with Meshes).
Mesh types
| 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 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 regions of interest are exported in this format. |
How to Export an ROI to a Normal or Sampled Mesh
- Select the required region of interest in the Data Properties and Settings panel.
- Click the To a Mesh button in the Export box on the ROI Tools panel.
- Do one of the following:
- Choose Normal in the drop-down menu to export the 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 the 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 Normal in the drop-down menu to export the mesh without sampling.
How to Export an ROI to a Cubic Mesh
- Select the required region of interest in the Data Properties and Settings panel.
- Click the To a Mesh button in the Export box on the ROI Tools panel.
- Choose Cubic in the menu options.
The cubic mesh is created and added to the Data Properties and Settings panel (see Mesh Properties and Settings for more information about meshes).
How to Export an ROI to a Thickness Mesh
Refer to the following instructions for information about computing thickness meshes from a region of interest.
- Select the required region of interest in the Data Properties and Settings panel.
- Click the To a Thickness Mesh button in the Export group box on the ROI Tools panel.
- Do one of the following:
- Choose Normal in the drop-down menu to export the mesh without sampling.
- Choose Normal (Sampled) in the menu options to export the mesh with sampling.
You should note that the use of simplified models is one way to enable real-time, interactive visualization of large, complex meshes.
Select the sampling values for the X, Y, and Z axes.
- If required, check the Perform smoothing option.
- Do the following if you are smoothing the mesh during export:
- Choose a smoothing method — Laplacian Smoothing or Hamming Windowed Smoothing (see Smoothing Meshes for information about the smoothing methods).
NOTE You can adjust additional properties for Hamming Windowed Smoothing in the Advanced Parameters dialog. Click the Advanced Properties button to open the dialog.
- Choose the number of iterations required.
- Choose a smoothing method — Laplacian Smoothing or Hamming Windowed Smoothing (see Smoothing Meshes for information about the smoothing methods).
- Click the OK button to export the thickness mesh.
When processing is complete, the exported thickness mesh appears on the Data Properties and Settings panel.
See Mesh Properties and Settings for information about making a mesh visible in a scene and about the settings available in the lower section of the panel. See Evaluating Meshes with the Measurement Inspector for information about inspecting the mesh with the help of the Measurement Inspector, shown below.
