# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=25

[Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md)

**Page:** 26

---

## [TotalSegmentator License Activation Issues](https://discourse.slicer.org/t/totalsegmentator-license-activation-issues/34866)

<div class="topic-metadata">

**Author:** [@KewilB](https://discourse.slicer.org/u/KewilB)\
**Replies:** 13\
**Last updated:** [October 11, 2025, 8:23am UTC](https://discourse.slicer.org/t/totalsegmentator-license-activation-issues/34866 "2025-10-11T08:23:44Z")

</div>

I recently obtained a license in order to use the heartchambers highres option. I am unable to activate my license. When I put the code sent to my email in the python console, I get a syntax error. Not sure if this is th…

---

## [Slow application start if recently used file is on unavailable network](https://discourse.slicer.org/t/slow-application-start-if-recently-used-file-is-on-unavailable-network/25970)

<div class="topic-metadata">

**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 11\
**Last updated:** [October 11, 2025, 3:17am UTC](https://discourse.slicer.org/t/slow-application-start-if-recently-used-file-is-on-unavailable-network/25970 "2025-10-11T03:17:54Z")

</div>

Maybe this is what I noticed today where it was hanging at initialization and would finally load modules after a noticeable delay. This happening on launch of the application (not just first startup). I use a multi monit…

---

## [Controlling Volume Reslice Driver to follow 5DOF inplane view of tool](https://discourse.slicer.org/t/controlling-volume-reslice-driver-to-follow-5dof-inplane-view-of-tool/44712)

<div class="topic-metadata">

**Author:** [@ruffsl](https://discourse.slicer.org/u/ruffsl)\
**Replies:** 4\
**Last updated:** [October 10, 2025, 11:09pm UTC](https://discourse.slicer.org/t/controlling-volume-reslice-driver-to-follow-5dof-inplane-view-of-tool/44712 "2025-10-10T23:09:06Z")

</div>

I’d like show a 5DOF inplane view of needle using the Volume Reslice Driver extension, with the 6th DOF rotation locked in alignment with respect to a canonical axis in the global RAS reference frame, providing a more gr…

---

## [When I finish processing in TotalSegmentator, "Show 3d" is not clickable](https://discourse.slicer.org/t/when-i-finish-processing-in-totalsegmentator-show-3d-is-not-clickable/44721)

<div class="topic-metadata">

**Author:** [@cp15](https://discourse.slicer.org/u/cp15)\
**Replies:** 1\
**Last updated:** [October 10, 2025, 12:35pm UTC](https://discourse.slicer.org/t/when-i-finish-processing-in-totalsegmentator-show-3d-is-not-clickable/44721 "2025-10-10T12:35:04Z")

</div>

When I finsih processing a file, it says processing complete and there are no errors listed. I am unable to toggle the “show 3d” button. I’m nor sure what I’m missing.

---

## [Slicer cannot be used on the extended screen](https://discourse.slicer.org/t/slicer-cannot-be-used-on-the-extended-screen/44710)

<div class="topic-metadata">

**Author:** [@Cr\_C](https://discourse.slicer.org/u/Cr_C)\
**Replies:** 0\
**Last updated:** [October 9, 2025, 5:23pm UTC](https://discourse.slicer.org/t/slicer-cannot-be-used-on-the-extended-screen/44710 "2025-10-09T17:23:33Z")

</div>

Slicer becomes unusable after I connect the extended display There were no issues using Slicer on my laptop before connecting the external display. After connecting the extended display via HDMI, I dragged the Slicer wi…

---

## [New Feature: visual DICOM browser](https://discourse.slicer.org/t/new-feature-visual-dicom-browser/33874)

<div class="topic-metadata">

**Author:** [@Davide\_Punzo](https://discourse.slicer.org/u/Davide_Punzo)\
**Replies:** 15\
**Last updated:** [October 9, 2025, 4:33pm UTC](https://discourse.slicer.org/t/new-feature-visual-dicom-browser/33874 "2025-10-09T16:33:46Z")

</div>

Description The visual DICOM browser provides a new user interface for quick viewing and retrieval of patient images stored on remote DICOM servers. The new tool is optimized for clinical workflows where the focus is on …

---

## [BoneReconstructionPlanner: Mandible surgical guide error](https://discourse.slicer.org/t/bonereconstructionplanner-mandible-surgical-guide-error/42481)

<div class="topic-metadata">

**Author:** [@Bartek\_Wisniewski](https://discourse.slicer.org/u/Bartek_Wisniewski)\
**Replies:** 9\
**Last updated:** [October 9, 2025, 2:51pm UTC](https://discourse.slicer.org/t/bonereconstructionplanner-mandible-surgical-guide-error/42481 "2025-10-09T14:51:30Z")

</div>

Hey, I have problem with generating surgical guide. I tried to make sure nothing collides with central sawboxes, tried different sizes od bigger sawboxes, changed fiducial plenty of times and yet I always get this error…

---

## [curved planar reconstruction segmentation](https://discourse.slicer.org/t/curved-planar-reconstruction-segmentation/44700)

<div class="topic-metadata">

**Author:** [@hltkrgz](https://discourse.slicer.org/u/hltkrgz)\
**Replies:** 3\
**Last updated:** [October 9, 2025, 2:24am UTC](https://discourse.slicer.org/t/curved-planar-reconstruction-segmentation/44700 "2025-10-09T02:24:53Z")

</div>

Hi, I am trying to segment coronary plaques, but when I upload the curved planar images we get from our provider to 3dslicer, all slices are different nodes, and I can’t segmentate them together. i think this is due to o…

---

## [Volume orientation (dcm vs nii.gz)](https://discourse.slicer.org/t/volume-orientation-dcm-vs-nii-gz/44697)

<div class="topic-metadata">

**Author:** [@bserrano](https://discourse.slicer.org/u/bserrano)\
**Replies:** 2\
**Last updated:** [October 9, 2025, 2:24am UTC](https://discourse.slicer.org/t/volume-orientation-dcm-vs-nii-gz/44697 "2025-10-09T02:24:07Z")

</div>

Hi all, I am working with cardiac CT data in two formats: DICOM and NIfTI (.nii.gz). I am trying to automate some processes related to the placement of fiducials, but I’ve noticed an unexpected behavior: When I load …

---

## [Cannot import name 'vtkMRMLPathPlannerTrajectoryNode' at launch](https://discourse.slicer.org/t/cannot-import-name-vtkmrmlpathplannertrajectorynode-at-launch/44227)

<div class="topic-metadata">

**Author:** [@ruffsl](https://discourse.slicer.org/u/ruffsl)\
**Replies:** 1\
**Last updated:** [October 9, 2025, 2:17am UTC](https://discourse.slicer.org/t/cannot-import-name-vtkmrmlpathplannertrajectorynode-at-launch/44227 "2025-10-09T02:17:43Z")

</div>

I have a working scripted extension that enables a user to select a path within any chosen trajectory list, as generated via the separate PathExplorer widget from the SlicerIGT extension: SlicerIGT/PathExplorer at m…

---

## [Labelmap values changing during conversion from segments back to labels](https://discourse.slicer.org/t/labelmap-values-changing-during-conversion-from-segments-back-to-labels/44663)

<div class="topic-metadata">

**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 4\
**Last updated:** [October 8, 2025, 7:22pm UTC](https://discourse.slicer.org/t/labelmap-values-changing-during-conversion-from-segments-back-to-labels/44663 "2025-10-08T19:22:16Z")

</div>

Hi, In my workflow I am importing an 8 bit greyscale volume/mask where each pixel corresponds to a subregion. Some of the pixel values are rather high (e.g. ,227), and there are gaps between the classes (some intermedi…

---

## [Lightbox doesnt show limited as seperate lines](https://discourse.slicer.org/t/lightbox-doesnt-show-limited-as-seperate-lines/44698)

<div class="topic-metadata">

**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 3\
**Last updated:** [October 8, 2025, 2:03pm UTC](https://discourse.slicer.org/t/lightbox-doesnt-show-limited-as-seperate-lines/44698 "2025-10-08T14:03:35Z")

</div>

LIGHTBOX DOESNT SHOW LIMITED AS SEPERATE LINES LATELY , WHEN I MOVE THE START AND END OFFSET . THE SELECTED VIEW WILL SCROLL INSTEAD.:sweat\_smile:

---

## [Surface Normal Calculation Issue Using SurfaceNets](https://discourse.slicer.org/t/surface-normal-calculation-issue-using-surfacenets/40811)

<div class="topic-metadata">

**Author:** [@leoavileis](https://discourse.slicer.org/u/leoavileis)\
**Replies:** 6\
**Last updated:** [October 8, 2025, 1:34pm UTC](https://discourse.slicer.org/t/surface-normal-calculation-issue-using-surfacenets/40811 "2025-10-08T13:34:11Z")

</div>

Dear community, I’m writing to report an issue that showed up on my project regarding normal calculations when exporting models based on my segmentations. Basically when I export the models while SurfaceNets rendering i…

---

## [I'm Beginner and i want help](https://discourse.slicer.org/t/im-beginner-and-i-want-help/44679)

<div class="topic-metadata">

**Author:** [@Ghaith](https://discourse.slicer.org/u/Ghaith)\
**Replies:** 8\
**Last updated:** [October 8, 2025, 1:05pm UTC](https://discourse.slicer.org/t/im-beginner-and-i-want-help/44679 "2025-10-08T13:05:02Z")

</div>

Greetings I’m a biomedical engineering student and I have installed 3D slicer I’m struggling with everything :confused: I want Dicom files and sources please Is there anyone can help Is there any community on WhatsAp…

---

## [Optimal seam stitching of ultrasound images](https://discourse.slicer.org/t/optimal-seam-stitching-of-ultrasound-images/44690)

<div class="topic-metadata">

**Author:** [@dzenanz](https://discourse.slicer.org/u/dzenanz)\
**Replies:** 0\
**Last updated:** [October 7, 2025, 8:46pm UTC](https://discourse.slicer.org/t/optimal-seam-stitching-of-ultrasound-images/44690 "2025-10-07T20:46:36Z")

</div>

Combining two partly overlapping ultrasound images in usual ways typically incurs blurring or a noticeable seem. Some methods to avoid this have been published. Is there any open source implementation? Ideally implemente…

---

## [Question PlaneNode Normal](https://discourse.slicer.org/t/question-planenode-normal/44685)

<div class="topic-metadata">

**Author:** [@evaherbst](https://discourse.slicer.org/u/evaherbst)\
**Replies:** 2\
**Last updated:** [October 7, 2025, 1:37pm UTC](https://discourse.slicer.org/t/question-planenode-normal/44685 "2025-10-07T13:37:59Z")

</div>

I am currently creating planes based on 3 control points as follows: planeNode = slicer.mrmlScene.AddNewNodeByClass(“vtkMRMLMarkupsPlaneNode”, “myPlaneNode") planeNode.SetPlaneType(2) # PlaneTypeThreePoints planeNod…

---

## [Adjust segmentation transparency of orthoslices and volumes independently for better contrast in 3d view](https://discourse.slicer.org/t/adjust-segmentation-transparency-of-orthoslices-and-volumes-independently-for-better-contrast-in-3d-view/44653)

<div class="topic-metadata">

**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 5\
**Last updated:** [October 4, 2025, 8:32pm UTC](https://discourse.slicer.org/t/adjust-segmentation-transparency-of-orthoslices-and-volumes-independently-for-better-contrast-in-3d-view/44653 "2025-10-04T20:32:31Z")

</div>

When you select the “eye” to show an orthogonal slice in the 3D view, in the 3d viewer, it would nice if the segmentations could be shown as solid colors and the 3D segment volume could be translucent. This would give a…

---

## [How to copy a segmentation from one slice to the next in Segment Editor?](https://discourse.slicer.org/t/how-to-copy-a-segmentation-from-one-slice-to-the-next-in-segment-editor/44650)

<div class="topic-metadata">

**Author:** [@labixin](https://discourse.slicer.org/u/labixin)\
**Replies:** 3\
**Last updated:** [October 3, 2025, 3:36am UTC](https://discourse.slicer.org/t/how-to-copy-a-segmentation-from-one-slice-to-the-next-in-segment-editor/44650 "2025-10-03T03:36:30Z")

</div>

Hello, I am currently using the Segment Editor module in 3D Slicer (version 5.6.1, Windows 11) to edit liver contours. I would like to ask: if I have already defined the contour on one slice, is it possible to directly …

---

## [How to understand SegmentMesher with Image spacing and Image Dimensions](https://discourse.slicer.org/t/how-to-understand-segmentmesher-with-image-spacing-and-image-dimensions/44632)

<div class="topic-metadata">

**Author:** [@Shajia\_Ali](https://discourse.slicer.org/u/Shajia_Ali)\
**Replies:** 1\
**Last updated:** [October 2, 2025, 9:10pm UTC](https://discourse.slicer.org/t/how-to-understand-segmentmesher-with-image-spacing-and-image-dimensions/44632 "2025-10-02T21:10:04Z")

</div>

Hello everyone, I am using SegmentMesher for meshing, and so far things are going well. However, I am still trying to understand how image dimensions and voxel spacing influence the element size and the total number of …

---

## [Understanding CPU cores/threads and GPU roles in 3D Slicer workflows](https://discourse.slicer.org/t/understanding-cpu-cores-threads-and-gpu-roles-in-3d-slicer-workflows/44591)

<div class="topic-metadata">

**Author:** [@JaredAmudeo](https://discourse.slicer.org/u/JaredAmudeo)\
**Replies:** 1\
**Last updated:** [October 2, 2025, 8:57pm UTC](https://discourse.slicer.org/t/understanding-cpu-cores-threads-and-gpu-roles-in-3d-slicer-workflows/44591 "2025-10-02T20:57:31Z")

</div>

Hello, I’m not sure if this is the right place to ask, but I would like to know where I could learn more about the hardware and how it is involved in the different modules. From what I understand, the GPU is mainly used…

---

## [Sudden crash during save](https://discourse.slicer.org/t/sudden-crash-during-save/44649)

<div class="topic-metadata">

**Author:** [@dfajtai](https://discourse.slicer.org/u/dfajtai)\
**Replies:** 2\
**Last updated:** [October 2, 2025, 2:29pm UTC](https://discourse.slicer.org/t/sudden-crash-during-save/44649 "2025-10-02T14:29:51Z")

</div>

Dear Slicer Developers, Please accept my greatest gratitude for developing such a marvelous software, one that excels at crashing right when saving, while also making sure to destroy everything I had saved before. That …

---

## [Model to Model Distance in tubular structure - Intestin wall](https://discourse.slicer.org/t/model-to-model-distance-in-tubular-structure-intestin-wall/44631)

<div class="topic-metadata">

**Author:** [@winter](https://discourse.slicer.org/u/winter)\
**Replies:** 5\
**Last updated:** [October 2, 2025, 9:06am UTC](https://discourse.slicer.org/t/model-to-model-distance-in-tubular-structure-intestin-wall/44631 "2025-10-02T09:06:01Z")

</div>

Dear Slicer Community, I am working on a heat map representation of the thickness of colon wall in mice. I Segmented the lumen, the colon wall and the area outside the outer colon wall, and exported the segments to mod…

---

## [Batch dental segmentator: No valid volume file found in the folder](https://discourse.slicer.org/t/batch-dental-segmentator-no-valid-volume-file-found-in-the-folder/44633)

<div class="topic-metadata">

**Author:** [@Chanrury\_s](https://discourse.slicer.org/u/Chanrury_s)\
**Replies:** 4\
**Last updated:** [October 1, 2025, 8:47pm UTC](https://discourse.slicer.org/t/batch-dental-segmentator-no-valid-volume-file-found-in-the-folder/44633 "2025-10-01T20:47:23Z")

</div>

Hello! I’m having problems with the “AutomatedDentalTools” extension. AutomatedDentalTools contains the “BatchDentalSegmentator” module. When I select a date folder, an error appears (No valid volume file found in the…

---

## [Volume Rendering Module Presets Thumbnails](https://discourse.slicer.org/t/volume-rendering-module-presets-thumbnails/44641)

<div class="topic-metadata">

**Author:** [@Esteban\_Barreiro](https://discourse.slicer.org/u/Esteban_Barreiro)\
**Replies:** 4\
**Last updated:** [October 1, 2025, 1:02pm UTC](https://discourse.slicer.org/t/volume-rendering-module-presets-thumbnails/44641 "2025-10-01T13:02:49Z")

</div>

Hi! I notice that in the past few versions of 3dSlicer, in the Volume Rendering Module, the Presets thumbnails doesn’t show in the GUI as in the past.

---

## [Unable to Import Lumafield NRRD file](https://discourse.slicer.org/t/unable-to-import-lumafield-nrrd-file/44566)

<div class="topic-metadata">

**Author:** [@mchon](https://discourse.slicer.org/u/mchon)\
**Replies:** 5\
**Last updated:** [September 30, 2025, 6:01pm UTC](https://discourse.slicer.org/t/unable-to-import-lumafield-nrrd-file/44566 "2025-09-30T18:01:40Z")

</div>

Operating system: Windows 10 Slicer version: 5.8.1 Expected behavior: Load NRRD file as volume Actual behavior: Error loading data. Does not recognize NRRD file. We use a X-Ray CT from a local startup called Lumafiel…

---

## [I can't set the favorites in the menu barr](https://discourse.slicer.org/t/i-cant-set-the-favorites-in-the-menu-barr/44570)

<div class="topic-metadata">

**Author:** [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Replies:** 3\
**Last updated:** [September 30, 2025, 2:22pm UTC](https://discourse.slicer.org/t/i-cant-set-the-favorites-in-the-menu-barr/44570 "2025-09-30T14:22:43Z")

</div>

In the 5.9.0-2025-09-20 issue, I am unable to set favourite modules in the menu.

---

## [Convert from spatial registration to shifts](https://discourse.slicer.org/t/convert-from-spatial-registration-to-shifts/44590)

<div class="topic-metadata">

**Author:** [@G\_Tom](https://discourse.slicer.org/u/G_Tom)\
**Replies:** 3\
**Last updated:** [September 30, 2025, 10:13am UTC](https://discourse.slicer.org/t/convert-from-spatial-registration-to-shifts/44590 "2025-09-30T10:13:13Z")

</div>

Hello, This is for the the experts in image registration, particularly CT to CBCT registration to obtain table shifts, Typically the CBCT is acquired on the day of treatment with the patient on the bed and registered w…

---

## [How do I integrate these installed extensions and python into the EXE installation package?](https://discourse.slicer.org/t/how-do-i-integrate-these-installed-extensions-and-python-into-the-exe-installation-package/44524)

<div class="topic-metadata">

**Author:** [@bulala](https://discourse.slicer.org/u/bulala)\
**Replies:** 5\
**Last updated:** [September 30, 2025, 1:32am UTC](https://discourse.slicer.org/t/how-do-i-integrate-these-installed-extensions-and-python-into-the-exe-installation-package/44524 "2025-09-30T01:32:30Z")

</div>

Operating system:Windows 11 Slicer version:5.8.1 Expected behavior: Actual behavior: Thank you 3D Slicer for providing such a handy medical imaging software. Due to network issues, I installed some extension packa…

---

## [TotalSegmentator Extra Task License Not Saved in Slicer 6.2](https://discourse.slicer.org/t/totalsegmentator-extra-task-license-not-saved-in-slicer-6-2/35622)

<div class="topic-metadata">

**Author:** [@evaherbst](https://discourse.slicer.org/u/evaherbst)\
**Replies:** 13\
**Last updated:** [September 30, 2025, 1:16am UTC](https://discourse.slicer.org/t/totalsegmentator-extra-task-license-not-saved-in-slicer-6-2/35622 "2025-09-30T01:16:42Z")

</div>

Hi all, I added the license for the extra tasks for TotalSegmentator as I did in previous versions. The license is added but I get prompted to restart slicer, and after restarting, the license is gone again (whereas pr…

---

## [how does vmtksurfaceprojection work](https://discourse.slicer.org/t/how-does-vmtksurfaceprojection-work/44629)

<div class="topic-metadata">

**Author:** [@furiabuia](https://discourse.slicer.org/u/furiabuia)\
**Replies:** 0\
**Last updated:** [September 29, 2025, 11:48pm UTC](https://discourse.slicer.org/t/how-does-vmtksurfaceprojection-work/44629 "2025-09-29T23:48:02Z")

</div>

Hi, I’m new to vmtk and I was trying to use vmtksurfaceprojection to project coordinates points of a centerline to another centerline. The problem is that what I obtain in output is a centerline with the same geometry an…

[Previous page](https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=24)

[Next page](https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=26)