Create a Hologram | US Lumi

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Create Holograms

After you upload a scan, the Lumi software generates a 'Hologram' entity. This Hologram may include the uploaded scan and any pre-existing 3D surface models. By clicking on the Hologram, the web-based 3D viewer opens which allows you to inspect the scan and/or start adding 3D objects to your Hologram. 3D surface models can be created using the segmentation functions (see below) or by manually upload a STL model (go to: STL Upload).

Note: Segmentations should always be verified by clinicians in LumiNE US by outline analysis on the source medical image, since false positive and negative segmentation regions can occur. For instructions to verify your segmentations, go to Verify Hologram.

Semi-Automatic Segmentation (T1cSF)

The LumiNE US Augmedit MRI T1 plus contrast Segmentation Function (T1cSF) transforms T1-weighted MR images (MRI-T1) of the head into 3D surface models of the skin, brain, and ventricles. The LumiNE US MRI T1 segmentation function (T1cSF) can thereby only be used in case of a single intracranial contrast enhancing tumor, diagnosed by a neuroradiologist or a neurosurgeon, with a minimal volume of 2.0 cc (0.1 in3) and a minimal diameter in any direction of 15 mm (0.6 inch), and a maximum volume of 100cc (6.1 in3) and a maximal diameter in any direction of 75 mm (3.0 inch).

Semi-Automatic Segmentation (T1cSF) Requirements

Requirements for using semi-automatic segmentation:

T1 MRI with contrast of the cranium from the vertex to at least the foramen magnum level and maximally to the C2 level.
Minimum 100 slices per series with a maximum slice thickness and interval of 2 mm.
The visualization of the image data and the output representations are based on the data quality and resolution of the original image data series. In case of poor image contrast, resolution, scan artifacts (such as patient movement) or other image related defects or inaccuracies, this can lead to inaccurate results.

Semi-Automatic Segmentation (T1cSF) Instructions

Follow these steps to start a semi-automatic segmentation:

Open a Hologram
Press the + button at the bottom of the menu on the right side
Select 'Automatic Segmentation'
Select the anatomical structures you wish to segment
Press 'START'
Wait for the segmentation to finish (approximately 7 minutes)

Start semi- automatic segmentation (T1cSF)

This video demonstrates how to:

Start the 3D viewer
Inspect the DICOM data
Start the segmentation
Monitor the progress of the segmentation

Manual Segmentation

The manual segmentation function can be used to visualize and generate a 3D surface model from a CT scan. You can see a 3D preview of the scan based on thresholds, which can dynamically be adjusted using a slider. Additionally, you can interactively adjust the region of interest in the scan, allowing you to clip a specific part of the scan volume. Once satisfied, the software can generate a 3D surface model from the preview.

Manual Segmentation Requirements

Requirements for using the manual segmentation:

CT images of the cranium
Minimum 104 slices per series with a maximum slice thickness and interval of 2.5 mm

Manual Segmentation Instructions

Follow these steps to create a manual segmentation:

Press the + button at the bottom of the menu on the right side
Select 'Manual Segmentation' and a 3D preview of the complete scan volume will be shown
Adjust the bounding box interactively to select the region you wish to segment
Change the thresholds using sliders, which dynamically show the 3D preview based on the various grey values
Press 'Create' when the Region of Interest and thresholds settings are set
Wait for the segmentation to finish (<1 minute)

Edit Names of 3D Surface Models

The name of a 3D surface model in the menu can be edited by double clicking the 3D surface model in the menu and typing another name. Make sure to Save the hologram to save your changed name.

Create manual segmentation

This video demonstrates how to:

Use the manual segmentation module
Create a manual segmentation