# \#extensions-manager

**URL:** https://discourse.slicer.org/tag/extensions-manager/9.md

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

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## [Request for feedback on ToothAnalyserMicroCT extension PR](https://discourse.slicer.org/t/request-for-feedback-on-toothanalysermicroct-extension-pr/48077)

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**Author:** [@Lukon](https://discourse.slicer.org/u/Lukon)\
**Replies:** 2\
**Last updated:** [September 7, 2026, 3:01pm UTC](https://discourse.slicer.org/t/request-for-feedback-on-toothanalysermicroct-extension-pr/48077 "2026-09-07T15:01:21Z")

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Hi everyone, I hope this is the right place to ask for some guidance. I submitted a pull request to add our extension, ToothAnalyserMicroCT, to the Slicer Extensions Catalog: Pull Request #2342 ToothAnalyserMicroCT i…

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## [How to quickly recompile updated code based on the current build version](https://discourse.slicer.org/t/how-to-quickly-recompile-updated-code-based-on-the-current-build-version/48089)

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**Author:** [@zhuofalin](https://discourse.slicer.org/u/zhuofalin)\
**Replies:** 1\
**Last updated:** [September 7, 2026, 2:23pm UTC](https://discourse.slicer.org/t/how-to-quickly-recompile-updated-code-based-on-the-current-build-version/48089 "2026-09-07T14:23:19Z")

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Hello, I am very happy to be back in the Slicer community.:grinning\_face: I typically use an older version of the slicer for development, but thanks to the efforts of the developers, new features are constantly being a…

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## [New extension: SlicerMicroView – read and write GE eXplore / MicroView VFF micro-CT volumes](https://discourse.slicer.org/t/new-extension-slicermicroview-read-and-write-ge-explore-microview-vff-micro-ct-volumes/48083)

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**Author:** [@falkwiegmann](https://discourse.slicer.org/u/falkwiegmann)\
**Replies:** 0\
**Last updated:** [September 6, 2026, 11:02pm UTC](https://discourse.slicer.org/t/new-extension-slicermicroview-read-and-write-ge-explore-microview-vff-micro-ct-volumes/48083 "2026-09-06T23:02:52Z")

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Hi all, I have submitted a small extension to the ExtensionsIndex and would appreciate a review when someone has a moment: Add SlicerMicroView extension by falkwiegmann · Pull Request #2390 · Slicer/ExtensionsIndex · Gi…

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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)

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**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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## [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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## [Tomografo EAGLE EDGE ](https://discourse.slicer.org/t/tomografo-eagle-edge/47862)

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**Author:** [@AMILCAR](https://discourse.slicer.org/u/AMILCAR)\
**Replies:** 1\
**Last updated:** [August 11, 2026, 3:05pm UTC](https://discourse.slicer.org/t/tomografo-eagle-edge/47862 "2026-08-11T15:05:04Z")

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Good morning. The radiology center has a Brazilian EAGLE EDGE CT scanner, and the slicer cannot read these DCM files. How can I solve this problem? Thank you very much for your help.

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## [Request for Source Code or Alternatives Extension/Plugins Similar to " Colon CAD in 3D Slicer"](https://discourse.slicer.org/t/request-for-source-code-or-alternatives-extension-plugins-similar-to-colon-cad-in-3d-slicer/47846)

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**Author:** [@qn\_Huynh](https://discourse.slicer.org/u/qn_Huynh)\
**Replies:** 1\
**Last updated:** [August 10, 2026, 5:49pm UTC](https://discourse.slicer.org/t/request-for-source-code-or-alternatives-extension-plugins-similar-to-colon-cad-in-3d-slicer/47846 "2026-08-10T17:49:10Z")

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Request for Source Code or Alternatives Extension/Plugins Similar to " Colon CAD in 3D Slicer" I am very interested in the project developed by Xu and colleagues, entitled “An Open-Source Implementation of Colon CAD in …

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## [SlicerNNInteractive: segmenting one structure erases part of an adjacent, already-completed segment](https://discourse.slicer.org/t/slicernninteractive-segmenting-one-structure-erases-part-of-an-adjacent-already-completed-segment/47792)

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**Author:** [@Jean\_Pinson](https://discourse.slicer.org/u/Jean_Pinson)\
**Replies:** 3\
**Last updated:** [August 9, 2026, 3:28am UTC](https://discourse.slicer.org/t/slicernninteractive-segmenting-one-structure-erases-part-of-an-adjacent-already-completed-segment/47792 "2026-08-09T03:28:55Z")

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Hi everyone, The new version of nninteractive in 3D slicer is huge !!! I’m using it on local on my desktop PC but I’ve now an issue that I hadn’t before where several structures are directly adjacent (e.g., bladder and …

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## [SlicerDRRGenerator (lancelevine) — how to get lateral/oblique views? Rotation parameters undocumented](https://discourse.slicer.org/t/slicerdrrgenerator-lancelevine-how-to-get-lateral-oblique-views-rotation-parameters-undocumented/47824)

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**Author:** [@anuragp2018](https://discourse.slicer.org/u/anuragp2018)\
**Replies:** 0\
**Last updated:** [August 7, 2026, 10:06am UTC](https://discourse.slicer.org/t/slicerdrrgenerator-lancelevine-how-to-get-lateral-oblique-views-rotation-parameters-undocumented/47824 "2026-08-07T10:06:46Z")

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Hi all, I’m using the SlicerDRRGenerator extension ( GitHub - lancelevine/SlicerDRRGenerator: A 3D Slicer extension that generates Digitally Reconstructed Radiographs · GitHub ) to generate DRRs from a pelvis CT for com…

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## [Measuring per-tooth displacement between serial intraoral scans - which modules?](https://discourse.slicer.org/t/measuring-per-tooth-displacement-between-serial-intraoral-scans-which-modules/47723)

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**Author:** [@Alla\_Belova](https://discourse.slicer.org/u/Alla_Belova)\
**Replies:** 2\
**Last updated:** [July 25, 2026, 4:15pm UTC](https://discourse.slicer.org/t/measuring-per-tooth-displacement-between-serial-intraoral-scans-which-modules/47723 "2026-07-25T16:15:56Z")

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Hi all — I’m a dentist working on a PhD metrology project and I kindly ask for your help to build an efficient protocol for measuring tooth displacement in time. The data: five surface meshes (STL) of the same mandibula…

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## [Converting Radial Artery from DICOM ( CT files) and Segmentation using slicer manually and using slicer AI 3d segmentation for simulation](https://discourse.slicer.org/t/converting-radial-artery-from-dicom-ct-files-and-segmentation-using-slicer-manually-and-using-slicer-ai-3d-segmentation-for-simulation/47603)

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**Author:** [@Chandana](https://discourse.slicer.org/u/Chandana)\
**Replies:** 0\
**Last updated:** [July 13, 2026, 3:22am UTC](https://discourse.slicer.org/t/converting-radial-artery-from-dicom-ct-files-and-segmentation-using-slicer-manually-and-using-slicer-ai-3d-segmentation-for-simulation/47603 "2026-07-13T03:22:57Z")

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Operating system: Windows 11 Slicer version: 5.9 Expected behavior: clear radial artery stl Actual behavior: unclear lump with bone

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## [Workflow for segmenting many lesions as separate segments?](https://discourse.slicer.org/t/workflow-for-segmenting-many-lesions-as-separate-segments/47094)

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**Author:** [@zhousy5310](https://discourse.slicer.org/u/zhousy5310)\
**Replies:** 5\
**Last updated:** [July 8, 2026, 8:56am UTC](https://discourse.slicer.org/t/workflow-for-segmenting-many-lesions-as-separate-segments/47094 "2026-07-08T08:56:49Z")

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Hi all, I’m currently working on NF1 cases using Slicer, and trying to find a better workflow. The main difficulty is not segmenting one lesion, but handling many separate lesions efficiently while keeping them as diff…

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## [Volume reconstruction feature missing in v.5.12](https://discourse.slicer.org/t/volume-reconstruction-feature-missing-in-v-5-12/47475)

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**Author:** [@Olivier](https://discourse.slicer.org/u/Olivier)\
**Replies:** 0\
**Last updated:** [June 27, 2026, 9:38am UTC](https://discourse.slicer.org/t/volume-reconstruction-feature-missing-in-v-5-12/47475 "2026-06-27T09:38:24Z")

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After updating to v 5.12, VolumeReconstruction is in the module list but when I click on it I get: VolumeReconstruction module is not loaded Any suggestion other than downgrading to 5.10?

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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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## [New extension: RadReirradiation for radiotherapy reirradiation analysis and EQD2 dose accumulation](https://discourse.slicer.org/t/new-extension-radreirradiation-for-radiotherapy-reirradiation-analysis-and-eqd2-dose-accumulation/47028)

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**Author:** [@LuisParedesOcampo](https://discourse.slicer.org/u/LuisParedesOcampo)\
**Replies:** 0\
**Last updated:** [May 14, 2026, 2:23pm UTC](https://discourse.slicer.org/t/new-extension-radreirradiation-for-radiotherapy-reirradiation-analysis-and-eqd2-dose-accumulation/47028 "2026-05-14T14:23:00Z")

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Hi everyone, I’d like to introduce RadReirradiation, a new 3D Slicer extension designed to support clinical reirradiation workflows in radiotherapy. The extension provides the following features: • Voxel-by-voxel BED …

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## [Model To Model Distance running as CLI](https://discourse.slicer.org/t/model-to-model-distance-running-as-cli/46971)

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**Author:** [@Mrdlev](https://discourse.slicer.org/u/Mrdlev)\
**Replies:** 1\
**Last updated:** [May 11, 2026, 1:27pm UTC](https://discourse.slicer.org/t/model-to-model-distance-running-as-cli/46971 "2026-05-11T13:27:52Z")

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Hi everyone, I’m trying to use the Model-to-Model Distance extension in 3D Slicer to quantify the average displacement between two structures (one with deformation and one without). However, I’ve run into an issue: I…

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## [Extensions-Manager: Extensions can not be installed](https://discourse.slicer.org/t/extensions-manager-extensions-can-not-be-installed/46824)

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**Author:** [@juliangallaun](https://discourse.slicer.org/u/juliangallaun)\
**Replies:** 2\
**Last updated:** [April 24, 2026, 1:29pm UTC](https://discourse.slicer.org/t/extensions-manager-extensions-can-not-be-installed/46824 "2026-04-24T13:29:09Z")

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Hello, I am unable to install new Extensions. Following message show up. Extensions can not be installed. Failed to load extension page using this URL: @KitwareMedical/slicer-extensions-webapp Check that 3D Slicer is…

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## [New extension pull request awaiting approval](https://discourse.slicer.org/t/new-extension-pull-request-awaiting-approval/46780)

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**Author:** [@MaxHoges](https://discourse.slicer.org/u/MaxHoges)\
**Replies:** 4\
**Last updated:** [April 22, 2026, 4:58pm UTC](https://discourse.slicer.org/t/new-extension-pull-request-awaiting-approval/46780 "2026-04-22T16:58:12Z")

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I recently got my BoneMat extension to a useful state and decided to try adding it to the extensions index. My first pull request to the ExtensionsIndex didn’t pass the extension validation test (which was initiated by a…

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## [Developing a vessel analysis module for 3D Slicer – guidance needed](https://discourse.slicer.org/t/developing-a-vessel-analysis-module-for-3d-slicer-guidance-needed/46762)

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**Author:** [@Benny\_Zamir](https://discourse.slicer.org/u/Benny_Zamir)\
**Replies:** 2\
**Last updated:** [April 18, 2026, 12:34am UTC](https://discourse.slicer.org/t/developing-a-vessel-analysis-module-for-3d-slicer-guidance-needed/46762 "2026-04-18T00:34:24Z")

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Hi, I’ve been working on a Python-based vessel analysis tool and uploaded it here: https://github.com/bz1977/VesselAnalyzer Current status: Branch segmentation and marker placement still need improvement Lesion …

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## [TotalSegmentator Error on CT](https://discourse.slicer.org/t/totalsegmentator-error-on-ct/46757)

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**Author:** [@ranahashemi](https://discourse.slicer.org/u/ranahashemi)\
**Replies:** 1\
**Last updated:** [April 16, 2026, 4:44pm UTC](https://discourse.slicer.org/t/totalsegmentator-error-on-ct/46757 "2026-04-16T16:44:46Z")

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Hi everyone, I am using TotalSegmentator for a bone segmentation on CT scan DICOM files which I extracted from Ga68-PSMA PET/CT of our patients, the problem is the extension is working with some patients and then with th…

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## [SlicerSeqSeg Extension](https://discourse.slicer.org/t/slicerseqseg-extension/46707)

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**Author:** [@numisveinsson](https://discourse.slicer.org/u/numisveinsson)\
**Replies:** 0\
**Last updated:** [April 10, 2026, 5:29pm UTC](https://discourse.slicer.org/t/slicerseqseg-extension/46707 "2026-04-10T17:29:06Z")

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Hi everyone, I’m sharing SeqSeg, a new 3D Slicer extension for seed-based segmentation of tubular/vascular structures from CT or MR. You place two fiducial seeds and a radius estimate; the module runs the SeqSeg pipelin…

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## [Extension site not found](https://discourse.slicer.org/t/extension-site-not-found/46484)

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**Author:** [@Aram](https://discourse.slicer.org/u/Aram)\
**Replies:** 2\
**Last updated:** [April 8, 2026, 11:06am UTC](https://discourse.slicer.org/t/extension-site-not-found/46484 "2026-04-08T11:06:11Z")

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Hi. I am new to Slicer3D. The web page https://extensions.slicer.org/ is not found. So I cant install any additional modules. What should I do?

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## [Fast Model Align module not working in 3D Slicer 5.10.0](https://discourse.slicer.org/t/fast-model-align-module-not-working-in-3d-slicer-5-10-0/46645)

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**Author:** [@abhijeet2410](https://discourse.slicer.org/u/abhijeet2410)\
**Replies:** 1\
**Last updated:** [April 3, 2026, 4:02am UTC](https://discourse.slicer.org/t/fast-model-align-module-not-working-in-3d-slicer-5-10-0/46645 "2026-04-03T04:02:26Z")

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Hello Team, We installed the SlicerMorph extension successfully (it shows up in Extension Manager), but the Fast Model Align module is not working properly. When we open the module, we only see the Help & Acknowledge…

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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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## [Publishing a new Slicer Python extension](https://discourse.slicer.org/t/publishing-a-new-slicer-python-extension/46506)

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**Author:** [@MaxHoges](https://discourse.slicer.org/u/MaxHoges)\
**Replies:** 1\
**Last updated:** [March 19, 2026, 9:19pm UTC](https://discourse.slicer.org/t/publishing-a-new-slicer-python-extension/46506 "2026-03-19T21:19:50Z")

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Hi all, I’ve been developing a Slicer extension in Python over the past 6 months to perform material mapping of Young’s modulus onto meshes from CT data, using Dr Elise Pegg’s project to perform the main material mappin…

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## [2026-03-19 macOS nightly build will be skipped](https://discourse.slicer.org/t/2026-03-19-macos-nightly-build-will-be-skipped/46499)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 1\
**Last updated:** [March 19, 2026, 3:07pm UTC](https://discourse.slicer.org/t/2026-03-19-macos-nightly-build-will-be-skipped/46499 "2026-03-19T15:07:46Z")

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Heads up: computron (macOS) nightly builds may be skipped tonight while we run a clean stable rebuild. Normal nightly schedule should resume tomorrow. The clean stable build should hopefully fix recent issues with insta…

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## [Help total segmentator](https://discourse.slicer.org/t/help-total-segmentator/46244)

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**Author:** [@jimenagonzalezsal](https://discourse.slicer.org/u/jimenagonzalezsal)\
**Replies:** 1\
**Last updated:** [February 23, 2026, 1:56am UTC](https://discourse.slicer.org/t/help-total-segmentator/46244 "2026-02-23T01:56:50Z")

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Hello! Could anyone help me set up total segmentator! thanks!

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## [Brain Tissues Extension not found/Separating Brain Tissues](https://discourse.slicer.org/t/brain-tissues-extension-not-found-separating-brain-tissues/15427)

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**Author:** [@Miguel](https://discourse.slicer.org/u/Miguel)\
**Replies:** 1\
**Last updated:** [February 17, 2026, 8:55am UTC](https://discourse.slicer.org/t/brain-tissues-extension-not-found-separating-brain-tissues/15427 "2026-02-17T08:55:09Z")

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Hello all, I need to separate gray and white matter and CSF from a volume, but I cannot find the BrainTissuesExtension. I am new here so I don’t know if there is an efficient way to segment it, or how can I install it. …

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## [3D slicer 5.10 SlicerSPECTRecon Critical warning: this will cause errors after 2025-11-30](https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132)

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**Author:** [@macp970617](https://discourse.slicer.org/u/macp970617)\
**Replies:** 0\
**Last updated:** [February 12, 2026, 7:06am UTC](https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132 "2026-02-12T07:06:14Z")

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Applications/Slicer.app/Contents/Extensions-34045/SPECTRecon/lib/Slicer-5.10/qt-scripted-modules/SPECTRecon.py:3: UserWarning: pkg\_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg\_resources…

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## [Integration of Mimics-like contouring and edit (magnet + grab) functionality into 3D Slicer for segmentation of CT Lumbar bones](https://discourse.slicer.org/t/integration-of-mimics-like-contouring-and-edit-magnet-grab-functionality-into-3d-slicer-for-segmentation-of-ct-lumbar-bones/46000)

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**Author:** [@Mirza\_Ahmad\_Awais](https://discourse.slicer.org/u/Mirza_Ahmad_Awais)\
**Replies:** 1\
**Last updated:** [January 30, 2026, 6:50pm UTC](https://discourse.slicer.org/t/integration-of-mimics-like-contouring-and-edit-magnet-grab-functionality-into-3d-slicer-for-segmentation-of-ct-lumbar-bones/46000 "2026-01-30T18:50:06Z")

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Hello! I am trying to add contouring and edit contouring functionality into 3D slicer as a replacement to mimics or mimics-like tool so we can accurately segment lumbar bodies for surgical implant design purposes. Firstl…

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