Upload Custom Made 3D Models​

3D models can be uploaded to Lumi in STL format and added to a 3D patient for 3D AR visualization.

• Note: The conversion between original voxel-based 3D segmentation objects and the exported STL models may lead to loss of information due to voxel interpolation effects. Therefore, please carefully inspect any imported 3D model in Lumi. For more instructions, check Verify Hologram.

• Note: 3D models must be uploaded and associated only with the exact same scan from which they were created.

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Uploading and adding a 3D model involves 2 steps: uploading the 3D model to Lumi Web (steps 1-2) and adding the 3D model to a 3D patient (steps 3-6). The steps are as follows:

1. Open a 3D patient in the Lumi web application. In the Study or 3D patient hierarchy level (see figure below), use the 'Add' button to select one or multiple 3D models. Alternatively, you can drag and drop 3D models into the dropzone on the ‘Add’ button. Notes:

   • A 3D model can only be added to an existing patient.

   • 3D models can only be uploaded using the Lumi web application, e.g. not in the Lumi HL2 application.

2. A list of all selected 3D models will be shown in a dialog window which allows you to rename the 3D model and/or choose a template for the 3D model before the 3D model is uploaded and stored in the Lumi cloud. Once you have chosen the desired name and template, the 3D models will be uploaded and saved in Lumi. Note:

   • You can always change the name, template, or color later if needed.

3. To use or view the 3D models, they must be added to a 3D patient. Open a 3D patient, press the ‘+’ button, and select ‘Import Model (STL).’

4. In the 'Select Surface' dialog window, a list of all available 3D models within the 3D patient will appear. Clicking on a 3D model in this list will display a preview of the 3D model in the 3D viewer. Lumi automatically proposes the 3D model preview in the correct coordinate system and scale. When you verify that the coordinate system is correct, clicking the ‘Add’ button will add the selected 3D models to the 3D patient, and the preview pop up window will close. Notes:

   • If the 3D model is not placed in the correct coordinate system, you can select a different coordinate system from a dropdown list, and the 3D model preview will adjust accordingly for verification.

   • If the proposed scale of the 3D model is incorrect (e.g., in millimetres instead of meters), you can select a different scale (mm, cm, or meter), and the scale will update for verification.

5. The imported 3D model will be added as a 3D patient part, with the same functionalities as any other 3D model (e.g., a 3D model created using the T1cSF and/or CTncSF). Notes:

   • Users can change the color, adjust transparency, or use the draw and shape edit functionalities, among other options.

   • This means users can visualize the 3D model and their outline on the medical scans for verification purpose.

6. When the new 3D models are added to the 3D patient, the verification state of the 3D patient will be set to ‘Unverified,’ just as it is when segmentation is completed. The verification workflow will automatically be started, which you should use to inspect the 3D model’s accuracy by viewing its outline as a contour on the scan slices. Additionally, the verification workflow allows for direct adjustments (shape edit) in case any inconsistencies are detected. Once the verification workflow is complete and the added 3D model(s) are individually verified, the verification state of the 3D patient will change to ‘Verified.’ For detailed instructions, go to: Verify 3D Patient)