Opening DICOM Folders
Go to the ’CT’ tab and click ‘Open DICOMs’. This option loads all DICOM volumes from a selected folder, including its sub-folders. After you choose the folder that contains your scans, MeshInspector will enable you to automatically import the full dataset and prepare it for viewing.
Selecting a DICOM Folder
In the file browser, navigate to the directory that contains your DICOM study. As shown, simply select the folder with all the DICOM slices inside (in this case, 427 items). Our program will read the entire folder, so there is no need to pick anything. Confirm the selection to load the full volume.
Viewing Your DICOMs
After import, all extracted volumes appear in the Scene Tree as separate voxel objects. Each reconstructed structure can be viewed independently or together. Use the eye icons to toggle visibility and explore the dataset interactively. Rotate the view with the left mouse button, pan with the right button or a two-finger gesture, and zoom using the mouse wheel or pinch gesture.
Changing the Size of a DICOM Volume
To resize a DICOM volume, first select the desired object in the Scene Tree. Then go to the ’Transform’ panel in the lower-left corner. Use the Scale field to increase or decrease the size of the voxel object. After entering the needed value, apply the transformation by clicking the checkmark icon. The volume updates immediately, and its bounding box and voxel-dimension values are recalculated accordingly.
Dealing with ISO for Better Viewing
ISO defines which intensity values inside a DICOM become visible as a surface. Adjusting this is essential for viewing. It changes how clearly different anatomical structures appear on the screen. Lower ISO values reveal softer tissues, while higher values emphasize denser regions such as bones. To modify the ISO, select the DICOM volume in the Scene Tree. Then go to the CT tab and click ‘Change ISO.’
Changing ISO
When you open ‘Change ISO’, MeshInspector displays the voxel intensity histogram together with the current ISO-value. This value determines which density level forms the visible surface of your voxel object. Type a new ISO-value directly into the input field or adjust it by dragging the vertical marker. At the top, you can also choose between ‘Dual Marching Cubes’ and the standard Marching Cubes algorithm. Enabling the checkbox often produces cleaner and more stable surfaces around complex features. Turning it off switches to the regular method, which may render faster but can show more issues.
Exploring Voxel Slices
Voxel slices allow you to examine your DICOM volume one layer at a time, revealing the internal anatomy that may be hidden in the 3D view. As shown, the Voxel Slice panel lets you cut through the scan along the YZ, ZX, or XY planes. Use the +/– buttons to move the slice forward or backward through the volume. Also, you can enter values manually or drag them. The corresponding 2D slice is displayed in the Slice window beneath . You can also enable ’Show Inactive Voxels’ and ’Highlight Current Voxel’ to better understand how the slice interacts with the full dataset. The radius of your marker is also under control.
Voxel Line Graph
Under the CT tab, click ‘Voxels Line Graph’ to analyze voxel intensity values along any user-defined line in your DICOM volume. In this case, the MeshInspector program will display a graph showing how voxel values change along that line, helping you identify density variations, boundaries, and transitions inside scans.
Using ‘Voxel Line Graph’
The graph panel appears on the right side of the UI. Here you can examine how voxel intensity changes along a specific axis. X, Y, or Z can be selected to define the direction of the probe line through your volume. Then adjust the numeric value next to the chosen axis to shift the line’s position. As you move the line, the graph below updates instantly.
Voxels Path
Clicking ‘Voxels Path’ under the ‘CT’ tab enables you to compute the optimal path between two specified voxel positions. The panel on the right lets you define Voxel 1 and Voxel 2 by entering their indices or adjusting them with the plus and minus buttons. Below, you can choose the metric type used for the calculation: 'Difference' or 'Exponent.' After setting your parameters, use the ‘Rebuild’ button to generate a new path or ‘Reset’ to clear the current one. The computed path is drawn directly on the DICOM volume.
Set Active Voxel Box
Clicking ‘Set Active Voxel Box’ in the ‘CT’ tab allows you to define a specific sub-region of your DICOM volume to work with. The resulting panel provides two sets of controls. The 'Min corner' values define the starting coordinate of the voxel box. You can adjust each axis using the plus and minus buttons. The 'Dims' values specify the size of the box along each axis. Again, the plus and minus buttons let you fine-tune the dimensions interactively. Optionally, you can enable 'Create New Object' to generate a separate voxel object from the selected region.
