# Top

**URL:** https://discourse.slicer.org/top.md?page=2

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

**Page:** 3

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## [📣 SlicerModalityConverter - New update and models available](https://discourse.slicer.org/t/slicermodalityconverter-new-update-and-models-available/46098)

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**Author:** [@ciro.raggio](https://discourse.slicer.org/u/ciro.raggio)\
**Replies:** 0\
**Last updated:** [February 9, 2026, 3:00pm UTC](https://discourse.slicer.org/t/slicermodalityconverter-new-update-and-models-available/46098 "2026-02-09T15:00:57Z")

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We’ve expanded the ModalityConverter extension with two new AI models for medical image-to-image translation: CBCT to Synthetic CT (Head & Neck) CT to Synthetic PET (Chest), based on the study: Salehjahromi M, Karpine…

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## [Adding landmarks using Point List results in screen glitches](https://discourse.slicer.org/t/adding-landmarks-using-point-list-results-in-screen-glitches/47173)

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**Author:** [@thelobsternods](https://discourse.slicer.org/u/thelobsternods)\
**Replies:** 5\
**Last updated:** [June 8, 2026, 6:40pm UTC](https://discourse.slicer.org/t/adding-landmarks-using-point-list-results-in-screen-glitches/47173 "2026-06-08T18:40:49Z")

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We have been using the same protocol for adding landmarks to 3D models for years, but are suddenly experiencing issues with our established protocol. Specifically, we only have this problem after starting a new “point li…

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## [Sharing custom presets](https://discourse.slicer.org/t/sharing-custom-presets/46690)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 7\
**Last updated:** [April 23, 2026, 9:18pm UTC](https://discourse.slicer.org/t/sharing-custom-presets/46690 "2026-04-23T21:18:01Z")

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This is something I wanted for the SlicerMorph project for a while and I bite the bullet and asked copilot to create a github repo to share and add presets. As indicated in the contributing.MD you simply add two items t…

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## [Physician & Medical Imaging Engineer | Segmentation, CFD Prep & Imaging AI](https://discourse.slicer.org/t/physician-medical-imaging-engineer-segmentation-cfd-prep-imaging-ai/46194)

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**Author:** [@drnoorfatima](https://discourse.slicer.org/u/drnoorfatima)\
**Replies:** 0\
**Last updated:** [February 17, 2026, 6:37pm UTC](https://discourse.slicer.org/t/physician-medical-imaging-engineer-segmentation-cfd-prep-imaging-ai/46194 "2026-02-17T18:37:39Z")

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Hi everyone, I’m Noor , a physician with a background in neurology and clinical imaging, and over the past few years I’ve built a parallel focus in medical image processing and 3D reconstruction. I work at the intersec…

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## [Interpreting ANTs registration warp field directionality](https://discourse.slicer.org/t/interpreting-ants-registration-warp-field-directionality/45467)

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**Author:** [@lucinda](https://discourse.slicer.org/u/lucinda)\
**Replies:** 3\
**Last updated:** [December 15, 2025, 7:07pm UTC](https://discourse.slicer.org/t/interpreting-ants-registration-warp-field-directionality/45467 "2025-12-15T19:07:22Z")

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Hi! I am aiming to use 3DSlicer to visualize the effects of 3d transforms created with antsRegistration. The registration didn’t include any rigid or affine stages, just one SyN stage. I’ve confirmed that the forward and…

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## [Can the nninteractive server environment be in a read-only folder](https://discourse.slicer.org/t/can-the-nninteractive-server-environment-be-in-a-read-only-folder/45451)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [December 12, 2025, 4:43pm UTC](https://discourse.slicer.org/t/can-the-nninteractive-server-environment-be-in-a-read-only-folder/45451 "2025-12-12T16:43:59Z")

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During the workshops there are a lot of interest from biologists to use NNInteractive. However, it does take a while to set it up the server, particularly if you are not familiar that kind of thing. In MorphoCloud, we c…

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## [2026.10.13 Weekly Meeting](https://discourse.slicer.org/t/2026-10-13-weekly-meeting/48435)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 5\
**Last updated:** [October 13, 2026, 3:15pm UTC](https://discourse.slicer.org/t/2026-10-13-weekly-meeting/48435 "2026-10-13T15:15:37Z")

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Title: 2026.10.13 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · October 13, 20…

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## [3D Slicer 5.10.0: Metadata keyword filter seems inactive](https://discourse.slicer.org/t/3d-slicer-5-10-0-metadata-keyword-filter-seems-inactive/45054)

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**Author:** [@jimjllin](https://discourse.slicer.org/u/jimjllin)\
**Replies:** 6\
**Last updated:** [November 13, 2025, 4:21pm UTC](https://discourse.slicer.org/t/3d-slicer-5-10-0-metadata-keyword-filter-seems-inactive/45054 "2025-11-13T16:21:00Z")

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Hi Slicer Developers and Community, I am currently testing the 3D Slicer version 5.10.0 (tried both Mac and Windows versions). I seem to have found an issue where the keyword filter in the “Add DICOM Data” module’s “Vi…

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## [2026.08.18 Weekly Meeting](https://discourse.slicer.org/t/2026-08-18-weekly-meeting/47871)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 4\
**Last updated:** [August 18, 2026, 5:24pm UTC](https://discourse.slicer.org/t/2026-08-18-weekly-meeting/47871 "2026-08-18T17:24:27Z")

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Title: 2026.08.18 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · August 18, 202…

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## [A Segment Selector SegmentEditorEffect for large segmentations](https://discourse.slicer.org/t/a-segment-selector-segmenteditoreffect-for-large-segmentations/48726)

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**Author:** [@shai-ikko](https://discourse.slicer.org/u/shai-ikko)\
**Replies:** 1\
**Last updated:** [November 6, 2026, 4:57pm UTC](https://discourse.slicer.org/t/a-segment-selector-segmenteditoreffect-for-large-segmentations/48726 "2026-11-06T16:57:50Z")

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Hi, We’ve had a need to edit large segmentations, with dozens of segments (sometimes more than a hundred). Selecting segments from the segment list was extremely cumbersome, so we wrote a SegmentEditorEffect which lets …

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## [Best practices for more complex plots in Slicer?](https://discourse.slicer.org/t/best-practices-for-more-complex-plots-in-slicer/48176)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 5\
**Last updated:** [October 1, 2026, 6:55pm UTC](https://discourse.slicer.org/t/best-practices-for-more-complex-plots-in-slicer/48176 "2026-10-01T18:55:56Z")

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The slicer.util.plot() infrastructure is pretty limited. It’s OK for basic viewing of data that is already in MRML tables, but clunky for other data and incapable of nicer data visualizations. It would be really nice to…

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## [TotalSegmentator failed to install required packages](https://discourse.slicer.org/t/totalsegmentator-failed-to-install-required-packages/47606)

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**Author:** [@johny723](https://discourse.slicer.org/u/johny723)\
**Replies:** 8\
**Last updated:** [August 15, 2026, 9:33pm UTC](https://discourse.slicer.org/t/totalsegmentator-failed-to-install-required-packages/47606 "2026-08-15T21:33:40Z")

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I keep having a similar issue - how do I fix this? Thanks!

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## [Mac preview release fails to load extensions in the Extension Manager](https://discourse.slicer.org/t/mac-preview-release-fails-to-load-extensions-in-the-extension-manager/46612)

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**Author:** [@DeepaKrishnaswamy](https://discourse.slicer.org/u/DeepaKrishnaswamy)\
**Replies:** 5\
**Last updated:** [April 1, 2026, 3:46pm UTC](https://discourse.slicer.org/t/mac-preview-release-fails-to-load-extensions-in-the-extension-manager/46612 "2026-04-01T15:46:06Z")

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Hi, I installed the latest Slicer Preview Release 2026-03-29 (Slicer 5.11.0 revision 34472) on Mac. I noticed that the extensions are not loading in the Extensions Manager: I checked cdash and noticed many errors, e…

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## [PW 45 meetings begin next Week!](https://discourse.slicer.org/t/pw-45-meetings-begin-next-week/46872)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 1\
**Last updated:** [May 5, 2026, 1:50pm UTC](https://discourse.slicer.org/t/pw-45-meetings-begin-next-week/46872 "2026-05-05T13:50:27Z")

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Dear Project Week community, The first project week preparation meeting for PW 45 will be next Tuesday, May 5th, at 10:00 AM ET. (2026-05-05T14:00:00Z (UTC)) If you are interested in discussing a possible project, plea…

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## [Screen Capture and Screenshot export issues](https://discourse.slicer.org/t/screen-capture-and-screenshot-export-issues/46621)

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**Author:** [@Atticus](https://discourse.slicer.org/u/Atticus)\
**Replies:** 7\
**Last updated:** [April 2, 2026, 4:49pm UTC](https://discourse.slicer.org/t/screen-capture-and-screenshot-export-issues/46621 "2026-04-02T16:49:51Z")

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Hi community! I am trying to export images from 3D renders (transparent PNGs). Currently running 3DSlicer 5.10 on Win11. Issue 1: When using the Screen Capture module, if the default output file name is changed, the e…

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## [DentalSegmentator / nnUNet problems](https://discourse.slicer.org/t/dentalsegmentator-nnunet-problems/45728)

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**Author:** [@Aiden](https://discourse.slicer.org/u/Aiden)\
**Replies:** 4\
**Last updated:** [January 12, 2026, 5:08pm UTC](https://discourse.slicer.org/t/dentalsegmentator-nnunet-problems/45728 "2026-01-12T17:08:34Z")

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I’m having troubles with DentalSegmentator. 3D Slicer 5.10.0 The log: 2026/01/09 16:28:19.241 :: Start nnUNet install with requirements : nnunetv2 2026/01/09 16:28:19.280 :: - Installing nnunetv2 --no-deps... 2026/0…

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## [Keep the hand-drawn segmentation after interpolation](https://discourse.slicer.org/t/keep-the-hand-drawn-segmentation-after-interpolation/46605)

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**Author:** [@mrrezaie](https://discourse.slicer.org/u/mrrezaie)\
**Replies:** 6\
**Last updated:** [April 7, 2026, 2:14pm UTC](https://discourse.slicer.org/t/keep-the-hand-drawn-segmentation-after-interpolation/46605 "2026-04-07T14:14:23Z")

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Hello all. I’m working with a non-isotropic MRI, only the sagittal view with 31 slices. More info can be found in this post: Segmentation using curves . I drew the segmentation on each slice, however, the 3D shape is not…

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## [Shift-mouse not placing on surface of segment](https://discourse.slicer.org/t/shift-mouse-not-placing-on-surface-of-segment/48240)

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**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 7\
**Last updated:** [September 23, 2026, 4:56pm UTC](https://discourse.slicer.org/t/shift-mouse-not-placing-on-surface-of-segment/48240 "2026-09-23T16:56:54Z")

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This is on main, built yesterday on MacBook Pro M5. When I hold down shift in the 3D view to place a crosshair, the crosshair is placed slightly above the segment (see attached image). This does not happen on my Windows …

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## [Automatic segmentation of the ventricles (brain)](https://discourse.slicer.org/t/automatic-segmentation-of-the-ventricles-brain/45915)

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**Author:** [@Preetham\_Dange](https://discourse.slicer.org/u/Preetham_Dange)\
**Replies:** 7\
**Last updated:** [March 5, 2026, 8:11am UTC](https://discourse.slicer.org/t/automatic-segmentation-of-the-ventricles-brain/45915 "2026-03-05T08:11:07Z")

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Hello everyone, I am currently working on hydrocephalus . I wanted to automatically segment the ventricles (brain) and use the volume statistics for research purposes. I tried MONAI Auto3Dseg and nnUnet but I couldn’t f…

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## [Strategies for working with large microCT files](https://discourse.slicer.org/t/strategies-for-working-with-large-microct-files/45847)

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**Author:** [@Antmaker](https://discourse.slicer.org/u/Antmaker)\
**Replies:** 6\
**Last updated:** [February 10, 2026, 12:18am UTC](https://discourse.slicer.org/t/strategies-for-working-with-large-microct-files/45847 "2026-02-10T00:18:36Z")

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Hi, I am working with microCT tiff stacks and currently it is 75GB when read into the software at full resolution. Following the general guideline of using a hardware with RAM 6x-10x that of the file is not attainable e…

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## [Cannot install any extension updates](https://discourse.slicer.org/t/cannot-install-any-extension-updates/47912)

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**Author:** [@RushAR3DLab](https://discourse.slicer.org/u/RushAR3DLab)\
**Replies:** 8\
**Last updated:** [August 19, 2026, 7:13pm UTC](https://discourse.slicer.org/t/cannot-install-any-extension-updates/47912 "2026-08-19T19:13:39Z")

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hi, I upgraded today from 3d Slicer v 5.8 to 5.12 (latest stable version), because I had been experiencing the same issue already with v 5.8. When I launch Extension Manager it cannot download the files for updates. The …

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## [Converting .vtk to .inp file](https://discourse.slicer.org/t/converting-vtk-to-inp-file/46775)

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**Author:** [@Tom\_F-T](https://discourse.slicer.org/u/Tom_F-T)\
**Replies:** 8\
**Last updated:** [April 18, 2026, 5:48pm UTC](https://discourse.slicer.org/t/converting-vtk-to-inp-file/46775 "2026-04-18T17:48:54Z")

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I am trying to make a 3D model of trabecular bone for FEA in Abaqus. I am using slicer to convert the DICOM files of the bone into a 3D model, but when i first did this the .stl file i exported from slicer was only a sur…

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## [Carotid Artery Segmentation for CFD analysis](https://discourse.slicer.org/t/carotid-artery-segmentation-for-cfd-analysis/46177)

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**Author:** [@Arundhati](https://discourse.slicer.org/u/Arundhati)\
**Replies:** 4\
**Last updated:** [February 20, 2026, 5:13pm UTC](https://discourse.slicer.org/t/carotid-artery-segmentation-for-cfd-analysis/46177 "2026-02-20T17:13:31Z")

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Is there any tutorial to create 3D carotid artery to be used for CFD analysis by using any of the sample images available in the 3D slicer itself ?

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## [Slicer Heart documentation](https://discourse.slicer.org/t/slicer-heart-documentation/45660)

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**Author:** [@PaoloZaffino](https://discourse.slicer.org/u/PaoloZaffino)\
**Replies:** 6\
**Last updated:** [January 9, 2026, 3:42am UTC](https://discourse.slicer.org/t/slicer-heart-documentation/45660 "2026-01-09T03:42:03Z")

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Hi all, thank you very much for the SlicerHeart extension! I was wondering if, in addition to the links on the official github page, there is some additional guide/tutorial on how to use the extension. Best, Paolo

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## [Clarification on Segment Statistics: Surface Area vs. Cross-Sectional Area (CSA) for Muscle Analysis](https://discourse.slicer.org/t/clarification-on-segment-statistics-surface-area-vs-cross-sectional-area-csa-for-muscle-analysis/45559)

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**Author:** [@GaetanoGazze](https://discourse.slicer.org/u/GaetanoGazze)\
**Replies:** 3\
**Last updated:** [December 30, 2025, 6:41pm UTC](https://discourse.slicer.org/t/clarification-on-segment-statistics-surface-area-vs-cross-sectional-area-csa-for-muscle-analysis/45559 "2025-12-30T18:41:31Z")

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Hi everyone, I am performing a quantitative body composition analysis on single-slice CT scans (at the D10 level) using the Segment Statistics module in 3D Slicer. I would like to clarify a methodological doubt to ensur…

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## [User Discoverability Issues in Slicer 5.10](https://discourse.slicer.org/t/user-discoverability-issues-in-slicer-5-10/45187)

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**Author:** [@alireza](https://discourse.slicer.org/u/alireza)\
**Replies:** 8\
**Last updated:** [November 22, 2025, 3:13am UTC](https://discourse.slicer.org/t/user-discoverability-issues-in-slicer-5-10/45187 "2025-11-22T03:13:37Z")

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Hey everyone, I recently upgraded to Slicer 5.10, and I wanted to share some feedback regarding user discoverability. Specifically, I noticed that some commonly used buttons, such as “New Segmentation” and “New Transfor…

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## [Problems with extension manager](https://discourse.slicer.org/t/problems-with-extension-manager/47030)

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**Author:** [@jaimigray](https://discourse.slicer.org/u/jaimigray)\
**Replies:** 5\
**Last updated:** [May 18, 2026, 5:21pm UTC](https://discourse.slicer.org/t/problems-with-extension-manager/47030 "2026-05-18T17:21:36Z")

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Hi team! I’m having some problems with Slicer not loading the extensions manager correctly. This is happening with newer and older versions of slicer. When I launch Slicer, it opens a separate blank window called “vtkOut…

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## [Version 5.10.0, error in total segmentator](https://discourse.slicer.org/t/version-5-10-0-error-in-total-segmentator/45200)

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**Author:** [@hepato](https://discourse.slicer.org/u/hepato)\
**Replies:** 3\
**Last updated:** [November 24, 2025, 11:16am UTC](https://discourse.slicer.org/t/version-5-10-0-error-in-total-segmentator/45200 "2025-11-24T11:16:33Z")

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processing started Writing input file to /private/var/folders/0c/gpzkc1r575xdc6jdzv6v\_s6h0000gn/T/Slicer-cy/\_\_SlicerTemp\_\_2025-11-24\_06+19+55.287/total-segmentator-input.nii Creating segmentations with TotalSegmentator…

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## [2026.09.29 Weekly Meeting](https://discourse.slicer.org/t/2026-09-29-weekly-meeting/48251)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 3\
**Last updated:** [September 29, 2026, 3:58am UTC](https://discourse.slicer.org/t/2026-09-29-weekly-meeting/48251 "2026-09-29T03:58:55Z")

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Title: 2026.09.29 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · September 29, …

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## [Total segmentator module returned with non-zero exit status 1 on to 5.12.1](https://discourse.slicer.org/t/total-segmentator-module-returned-with-non-zero-exit-status-1-on-to-5-12-1/47634)

<div class="topic-metadata">

**Author:** [@Cromwell](https://discourse.slicer.org/u/Cromwell)\
**Replies:** 6\
**Last updated:** [July 21, 2026, 1:07am UTC](https://discourse.slicer.org/t/total-segmentator-module-returned-with-non-zero-exit-status-1-on-to-5-12-1/47634 "2026-07-21T01:07:02Z")

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I’m having problems with the execution of the total segmentator module, I thought it was something installation, as version 5.10 was running I updated to 5.12.1 but it keeps the same error only with this module. I saw th…

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## [DentalSegmentator : error loading results : failt to load the segmentation. ](https://discourse.slicer.org/t/dentalsegmentator-error-loading-results-failt-to-load-the-segmentation/48375)

<div class="topic-metadata">

**Author:** [@samzou974](https://discourse.slicer.org/u/samzou974)\
**Replies:** 7\
**Last updated:** [October 5, 2026, 6:58am UTC](https://discourse.slicer.org/t/dentalsegmentator-error-loading-results-failt-to-load-the-segmentation/48375 "2026-10-05T06:58:39Z")

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Operating system:Windows 11 PRO Slicer version: 5.12.4 Expected behavior: Segmentation of Cone-Beam using DentalSegmentator extension Actual behavior: error 2026/10/01 12:32:47.256 :: nnUNet is already installed (2.8…

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## [Is there a way to export in 3mf file format?](https://discourse.slicer.org/t/is-there-a-way-to-export-in-3mf-file-format/46130)

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**Author:** [@HelloAll](https://discourse.slicer.org/u/HelloAll)\
**Replies:** 7\
**Last updated:** [July 23, 2026, 1:41pm UTC](https://discourse.slicer.org/t/is-there-a-way-to-export-in-3mf-file-format/46130 "2026-07-23T13:41:14Z")

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Hi. I’m new to 3D Slicer. Is there a way to export files in 3mf format to make printing different segments with different colors easier?

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## [\- Struggling With Liver Segmentation in 3D Slicer — Need Guidance](https://discourse.slicer.org/t/struggling-with-liver-segmentation-in-3d-slicer-need-guidance/46420)

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**Author:** [@Marco\_Ribeiro\_Silva](https://discourse.slicer.org/u/Marco_Ribeiro_Silva)\
**Replies:** 6\
**Last updated:** [June 16, 2026, 11:18am UTC](https://discourse.slicer.org/t/struggling-with-liver-segmentation-in-3d-slicer-need-guidance/46420 "2026-06-16T11:18:12Z")

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Hello everybody I’m currently struggling to find up‑to‑date datasets to learn how to segment the liver in 3D Slicer. Many of the extensions I come across are outdated, incompatible, or no longer maintained, which makes …

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## [2026.09.22 Weekly Meeting](https://discourse.slicer.org/t/2026-09-22-weekly-meeting/48180)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 8\
**Last updated:** [September 23, 2026, 7:03am UTC](https://discourse.slicer.org/t/2026-09-22-weekly-meeting/48180 "2026-09-23T07:03:13Z")

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Title: 2026.09.22 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · September 22, …

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## [Slicer 5.10 crashes when Ctrl + click-and-drag adjusts segment opacity](https://discourse.slicer.org/t/slicer-5-10-crashes-when-ctrl-click-and-drag-adjusts-segment-opacity/46719)

<div class="topic-metadata">

**Author:** [@MaxVs](https://discourse.slicer.org/u/MaxVs)\
**Replies:** 8\
**Last updated:** [April 28, 2026, 8:09pm UTC](https://discourse.slicer.org/t/slicer-5-10-crashes-when-ctrl-click-and-drag-adjusts-segment-opacity/46719 "2026-04-28T20:09:01Z")

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Hi, I’ve encountered couple of crashes in a last few weeks. Everything works fine, and then the whole application closes up. It usually happnes when I change the opacity of the whole segmentation by holding left ctrl and…

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## [New Extension: DRAI AI 3D Segmentation and Modelling Extension for 3D Slicer](https://discourse.slicer.org/t/new-extension-drai-ai-3d-segmentation-and-modelling-extension-for-3d-slicer/48031)

<div class="topic-metadata">

**Author:** [@bywbilly](https://discourse.slicer.org/u/bywbilly)\
**Replies:** 0\
**Last updated:** [September 1, 2026, 4:12pm UTC](https://discourse.slicer.org/t/new-extension-drai-ai-3d-segmentation-and-modelling-extension-for-3d-slicer/48031 "2026-09-01T16:12:40Z")

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AI-powered segmentation for Spine/Pelvis (CT) and Aorta–Iliac–Femoral Arteries (CTA). Upload CT volumes directly from 3D Slicer to the DRAI server and receive high-quality, multi-label 3D segmentation masks and models w…

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## [vtkPlanarContourToBinaryLabelmapConversionRule](https://discourse.slicer.org/t/vtkplanarcontourtobinarylabelmapconversionrule/47507)

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**Author:** [@ferhue](https://discourse.slicer.org/u/ferhue)\
**Replies:** 8\
**Last updated:** [July 1, 2026, 1:58pm UTC](https://discourse.slicer.org/t/vtkplanarcontourtobinarylabelmapconversionrule/47507 "2026-07-01T13:58:28Z")

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I am interested in creating a variant of SlicerRT/DicomRtImportExport/ConversionRules/vtkPlanarContourToClosedSurfaceConversionRule.cxx at master · SlicerRt/SlicerRT · GitHub that directly converts a 2D Planar Contour t…

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## [How to remove added module?](https://discourse.slicer.org/t/how-to-remove-added-module/45015)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 6\
**Last updated:** [November 11, 2025, 9:50am UTC](https://discourse.slicer.org/t/how-to-remove-added-module/45015 "2025-11-11T09:50:38Z")

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I added module through drag and drop in additional module path . I want to remove but i could t find a way to remove the added path . Only option is to restore to default

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## [Strange folder bug](https://discourse.slicer.org/t/strange-folder-bug/46835)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [May 7, 2026, 11:14am UTC](https://discourse.slicer.org/t/strange-folder-bug/46835 "2026-05-07T11:14:40Z")

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In the latest preview in Macos, data module is behaving strangely: Load two models in a blank scene Create a NewFolder Put the models in the NewFolder Hit the visibility icon at the NewFolder and notice that those two …

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## [CT reconstruction artifacts?](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 1\
**Last updated:** [April 7, 2026, 8:24pm UTC](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677 "2026-04-07T20:24:25Z")

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Hi, I’d like to know what is the cause of the apparent artifact on the skin seen on the sagittal view of the picture below (circled by the CC curve) Thank you very much

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## [Slicer oneline installer script](https://discourse.slicer.org/t/slicer-oneline-installer-script/47568)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 7\
**Last updated:** [July 12, 2026, 10:48am UTC](https://discourse.slicer.org/t/slicer-oneline-installer-script/47568 "2026-07-12T10:48:01Z")

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Hi all, I have created this one-line installer script for Slicer and I’d like to receive feedback from the community. It has been tested on Ubuntu 22 and Windows 10 Linux & macOS version: curl -fsSL https://raw.githu…

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## [nnUNet fails with ModuleNotFoundError: No module named 'torchvision.ops'](https://discourse.slicer.org/t/nnunet-fails-with-modulenotfounderror-no-module-named-torchvision-ops/46802)

<div class="topic-metadata">

**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 5\
**Last updated:** [May 11, 2026, 9:03pm UTC](https://discourse.slicer.org/t/nnunet-fails-with-modulenotfounderror-no-module-named-torchvision-ops/46802 "2026-05-11T21:03:11Z")

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Using nnUNet extension with custom weights fails with the following error output. Start \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* nnUNet is already installed (2.7.0) and compatible…

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## [Volume transformation snapping to orientation closest to voxel orientation](https://discourse.slicer.org/t/volume-transformation-snapping-to-orientation-closest-to-voxel-orientation/46294)

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**Author:** [@Antmaker](https://discourse.slicer.org/u/Antmaker)\
**Replies:** 2\
**Last updated:** [February 26, 2026, 1:14pm UTC](https://discourse.slicer.org/t/volume-transformation-snapping-to-orientation-closest-to-voxel-orientation/46294 "2026-02-26T13:14:40Z")

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I’ve noticed this following behavior when I transform a volume then hide-and-unhide the volume, the volume will snap back to the orientation closest to the voxel orientation. This happens even when I harden the transform…

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## [Invisible wall limiting segmentation](https://discourse.slicer.org/t/invisible-wall-limiting-segmentation/46973)

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**Author:** [@FabricioFO](https://discourse.slicer.org/u/FabricioFO)\
**Replies:** 4\
**Last updated:** [June 3, 2026, 8:46pm UTC](https://discourse.slicer.org/t/invisible-wall-limiting-segmentation/46973 "2026-06-03T20:46:07Z")

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Example Hello, everyone. I’m facing the same problem as in the video: I try to segment a specific region and it doesn’t work, it seems like there’s an invisible wall preventing me from segmenting that region even with…

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## [2026.07.07 Weekly Meeting](https://discourse.slicer.org/t/2026-07-07-weekly-meeting/47523)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 8\
**Last updated:** [July 7, 2026, 4:13pm UTC](https://discourse.slicer.org/t/2026-07-07-weekly-meeting/47523 "2026-07-07T16:13:40Z")

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Title: 2026.07.07 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting Agenda: Please post to this thr…

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## [Slicer.packaging library](https://discourse.slicer.org/t/slicer-packaging-library/47056)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 5\
**Last updated:** [May 18, 2026, 12:03pm UTC](https://discourse.slicer.org/t/slicer-packaging-library/47056 "2026-05-18T12:03:48Z")

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I came across this blog post on Linked in https://www.kitware.com/improving-python-dependency-handling-for-3d-slicer-extension-development/ The post says it is already integrated into the Slicer preview preview build. T…

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## [C++ extension for 5.12 is not working (MacOS)](https://discourse.slicer.org/t/c-extension-for-5-12-is-not-working-macos/47542)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 6\
**Last updated:** [July 4, 2026, 4:16pm UTC](https://discourse.slicer.org/t/c-extension-for-5-12-is-not-working-macos/47542 "2026-07-04T16:16:32Z")

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@ebrahim @Sam\_Horvath @lassoan this is urgent: I just downloaded 5.12 for my MacOS, and quite a few of the C++ extension are installed but non-functional for due to library mismatch. I need these extensions for my Slice…

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## [Concurrent slicer mcp session](https://discourse.slicer.org/t/concurrent-slicer-mcp-session/47612)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 7\
**Last updated:** [July 24, 2026, 7:15pm UTC](https://discourse.slicer.org/t/concurrent-slicer-mcp-session/47612 "2026-07-24T19:15:36Z")

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Sometimes I run two agents simultaneously for different tasks. these tasks are often executed in different Slicer sessions also running concurrently (e.g., stable vs a preview version, or different code branches being te…

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## [PlasmatronX - Built a CT Scanner to See Sound](https://discourse.slicer.org/t/plasmatronx-built-a-ct-scanner-to-see-sound/46448)

<div class="topic-metadata">

**Author:** [@ruffsl](https://discourse.slicer.org/u/ruffsl)\
**Replies:** 1\
**Last updated:** [March 13, 2026, 12:57pm UTC](https://discourse.slicer.org/t/plasmatronx-built-a-ct-scanner-to-see-sound/46448 "2026-03-13T12:57:43Z")

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A neat clip using 3D Slicer out in the wild.

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## [Density and surface area of a segment on a single axial cut](https://discourse.slicer.org/t/density-and-surface-area-of-a-segment-on-a-single-axial-cut/48437)

<div class="topic-metadata">

**Author:** [@Mahdi\_H](https://discourse.slicer.org/u/Mahdi_H)\
**Replies:** 5\
**Last updated:** [October 13, 2026, 2:15am UTC](https://discourse.slicer.org/t/density-and-surface-area-of-a-segment-on-a-single-axial-cut/48437 "2026-10-13T02:15:38Z")

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Hello everyone! I am new to the 3d slicer software and its powerful features. I am currently planning a research project and have been successful in running totalsegmentator to segment tissues I am interested in. I hav…

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