How to Segment the Heart with the CT Heart Tool

1. Verify that your data has been properly imported into Materialise Mimics Core by checking for the image data under the Project management pane.

Semi-automatic segmentation:

1. Navigate to the Advanced segment menu and select the CT Heart tool.
2. Select Manual under Mode, and set the thresholds for the left and right heart with the slider tools.
3. To begin placing your Seed Points, start with the Axial view. Scroll through the 2D images to view the structures more clearly.
4. Select the structure from the list under Seed Points, and place your seed points, controlling the size and placements as needed.
5. Repeat for the rest of the structures, scrolling through the 2D images of each structure to select the best view.
6. Move to the Sagittal view and select the spine for the Other seed points.
7. Click Apply.
8. Click the green cube icon on the right side to view your seed points in 3D.
9. Click OK, and review your structures in the Objects pane.

Automatic segmentation:

1. Navigate to the Advanced segment menu and select the CT Heart tool.
2. Select Automatic under Mode and Full Heart under Regions of Interest.
3. Click Apply.
4. Once the results are ready, click OK and review all your structures in the Objects list.
5. Navigate to the Segment menu and select the Edit Masks tool.
6. Use the Lasso tool to select part connections you don't want in your 3D model, then click OK.
7. Select the Region Grow tool in the Segment menu, then click on your Target and press OK to remove all of the unwanted parts.
8. Repeat steps 5 – 7 for other regions of interest. Note: you can also complete these steps in 2D for more precise outlines.