# Top

**URL:** https://discourse.slicer.org/top.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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## [New slicer-skill ai tool](https://discourse.slicer.org/t/new-slicer-skill-ai-tool/46243)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 30\
**Last updated:** [May 26, 2026, 4:49pm UTC](https://discourse.slicer.org/t/new-slicer-skill-ai-tool/46243 "2026-05-26T16:49:01Z")

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After learning from previous experiments, several productive discussions at project week and at the last developer meeting, I put together this slicer-skill that can be used with coding agents like Claude code. It invol…

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## [Apple Silicon (arm64 macOS) application and extensions now available](https://discourse.slicer.org/t/apple-silicon-arm64-macos-application-and-extensions-now-available/48607)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 9\
**Last updated:** [October 30, 2026, 11:52am UTC](https://discourse.slicer.org/t/apple-silicon-arm64-macos-application-and-extensions-now-available/48607 "2026-10-30T11:52:45Z")

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The Apple Silicon installer for 3D Slicer is now available for preview builds on https://download.slicer.org/. A stable arm64 package will be available in the next release. Please give it a try and report any issues!

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## [Virtual CathLab: new module for C-arm and fluoroscopy imaging simulation](https://discourse.slicer.org/t/virtual-cathlab-new-module-for-c-arm-and-fluoroscopy-imaging-simulation/45355)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 10\
**Last updated:** [March 20, 2026, 11:34pm UTC](https://discourse.slicer.org/t/virtual-cathlab-new-module-for-c-arm-and-fluoroscopy-imaging-simulation/45355 "2026-03-20T23:34:34Z")

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Virtual Cath Lab module has been recently added to SlicerHeart extension. This module simulates monoplane and biplane C-arm systems: provides 3D model of the C-arm, table, patient and generates simulated fluoroscopy imag…

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## [New arxiv paper about MorphoCloud](https://discourse.slicer.org/t/new-arxiv-paper-about-morphocloud/45628)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 9\
**Last updated:** [January 14, 2026, 5:47pm UTC](https://discourse.slicer.org/t/new-arxiv-paper-about-morphocloud/45628 "2026-01-14T17:47:47Z")

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@muratmaga and @jcfr have a new preprint out describing MorphoCloud :+1:

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## [Release of Slicer 5.12 in progress](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 18\
**Last updated:** [October 14, 2026, 2:37pm UTC](https://discourse.slicer.org/t/release-of-slicer-5-12-in-progress/47440 "2026-10-14T14:37:00Z")

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We’ve temporarily disabled regular Preview and Stable builds of Slicer (and associated extensions) while we prepare the Slicer 5.12 Stable release. The Slicer repository will be tagged, and the release process will star…

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## [Rendering of DICOM image failed with more than 4 volumes since version 12](https://discourse.slicer.org/t/rendering-of-dicom-image-failed-with-more-than-4-volumes-since-version-12/48210)

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**Author:** [@mhouse](https://discourse.slicer.org/u/mhouse)\
**Replies:** 28\
**Last updated:** [November 2, 2026, 12:15pm UTC](https://discourse.slicer.org/t/rendering-of-dicom-image-failed-with-more-than-4-volumes-since-version-12/48210 "2026-11-02T12:15:11Z")

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Since version 12 (also with version 13) 3D Slicer crashes, because it cannot render an image with more than 4 volumes. At least with the version Slicer-5.11.0-2026-03-20-linux-amd64 it is working with 9 volumes, for e.g.…

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## [Volume rendering broken in latest Linux previews?](https://discourse.slicer.org/t/volume-rendering-broken-in-latest-linux-previews/46974)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 33\
**Last updated:** [November 3, 2026, 9:30am UTC](https://discourse.slicer.org/t/volume-rendering-broken-in-latest-linux-previews/46974 "2026-11-03T09:30:48Z")

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I am using the preview build from May 5th on Ubuntu, and I can’t get the MRHead (or any of the baked data) to render. When I drag and drop volume object to the 3D viewer, application fails catastrophically, without any e…

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## [Segmentation using curves](https://discourse.slicer.org/t/segmentation-using-curves/46511)

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**Author:** [@mrrezaie](https://discourse.slicer.org/u/mrrezaie)\
**Replies:** 23\
**Last updated:** [March 29, 2026, 2:29pm UTC](https://discourse.slicer.org/t/segmentation-using-curves/46511 "2026-03-29T14:29:42Z")

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Hello all. I’m trying to do MRI segmentation on a very thin and round structure (knee cartilage). I was wondering if there is any to create a surface on a set of polynomial curves like this: Looking forward to heari…

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## [Reconstructing a skull fragment with SSM/PDM](https://discourse.slicer.org/t/reconstructing-a-skull-fragment-with-ssm-pdm/45365)

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**Author:** [@ThomasVanParys](https://discourse.slicer.org/u/ThomasVanParys)\
**Replies:** 28\
**Last updated:** [December 9, 2025, 5:52pm UTC](https://discourse.slicer.org/t/reconstructing-a-skull-fragment-with-ssm-pdm/45365 "2025-12-09T17:52:12Z")

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Hello! I am seeking advice on how to practically reconstruct a skull in order to calculate cranial capacity. The skull is a fragment (missing skull base and some parietal), estimated to be a 4 year old indiviual. I ha…

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## [Is there a tool similar to Viewtify 3DCG?](https://discourse.slicer.org/t/is-there-a-tool-similar-to-viewtify-3dcg/45845)

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**Author:** [@eNable\_Polska](https://discourse.slicer.org/u/eNable_Polska)\
**Replies:** 12\
**Last updated:** [September 15, 2026, 2:42am UTC](https://discourse.slicer.org/t/is-there-a-tool-similar-to-viewtify-3dcg/45845 "2026-09-15T02:42:06Z")

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Is there a tool in Slicer that allows me to achieve a similar effect as in the attached image?

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## [Error loading tiff images as a 3D model](https://discourse.slicer.org/t/error-loading-tiff-images-as-a-3d-model/46561)

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**Author:** [@Varsha](https://discourse.slicer.org/u/Varsha)\
**Replies:** 16\
**Last updated:** [April 13, 2026, 11:27am UTC](https://discourse.slicer.org/t/error-loading-tiff-images-as-a-3d-model/46561 "2026-04-13T11:27:58Z")

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I am trying to load 15 tiff images which are basically images taken at different z slices and create a 3D model out of it. When I try doing this using the Image Stack option under Slicer Morph, the load button remains de…

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## [Slicer is so buggy and keeps showing error on macbook air M5](https://discourse.slicer.org/t/slicer-is-so-buggy-and-keeps-showing-error-on-macbook-air-m5/46687)

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**Author:** [@sathishbalachandran](https://discourse.slicer.org/u/sathishbalachandran)\
**Replies:** 11\
**Last updated:** [April 11, 2026, 3:58am UTC](https://discourse.slicer.org/t/slicer-is-so-buggy-and-keeps-showing-error-on-macbook-air-m5/46687 "2026-04-11T03:58:23Z")

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Hello Slicer Support Team, I am a Radiation Oncologist (MD, DNB) attempting to use 3D Slicer for my daily clinical cases (1-2 cases/day). I recently moved from an old, basic Windows laptop to a new MacBook Air M5, but t…

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## [Totalsegmentator and monai segmentation](https://discourse.slicer.org/t/totalsegmentator-and-monai-segmentation/45090)

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**Author:** [@alex\_He](https://discourse.slicer.org/u/alex_He)\
**Replies:** 14\
**Last updated:** [December 9, 2025, 2:42pm UTC](https://discourse.slicer.org/t/totalsegmentator-and-monai-segmentation/45090 "2025-12-09T14:42:49Z")

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Hi I just updated to ed slicer 5.10.0 but I found that it is not compatible with totalsegmentator 2 and monai. May iknow why

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## [Recovering or creating a large nonlinear inverse transform from an ANTs registration](https://discourse.slicer.org/t/recovering-or-creating-a-large-nonlinear-inverse-transform-from-an-ants-registration/45712)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 17\
**Last updated:** [January 27, 2026, 3:38am UTC](https://discourse.slicer.org/t/recovering-or-creating-a-large-nonlinear-inverse-transform-from-an-ants-registration/45712 "2026-01-27T03:38:01Z")

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I need to invert a nonlinear transform generated with the standard 3D Slicer ANTs extension, so it can be applied back to the fixed image to make it more like the moving, but it is becoming clear I do not understand how …

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## [Slicer 5.12.3 plans and fixing the macOS stable extension packages](https://discourse.slicer.org/t/slicer-5-12-3-plans-and-fixing-the-macos-stable-extension-packages/47715)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 9\
**Last updated:** [July 25, 2026, 1:32am UTC](https://discourse.slicer.org/t/slicer-5-12-3-plans-and-fixing-the-macos-stable-extension-packages/47715 "2026-07-25T01:32:49Z")

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Yesterday we merged Slicer#9302 which worked out the cause of the issue with macOS C++ extension packages on Slicer 5.12, and which hopefully resolved the issue. Today there’s good evidence from the nightly packages th…

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## [3d view in volume rendering](https://discourse.slicer.org/t/3d-view-in-volume-rendering/45716)

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**Author:** [@alex\_He](https://discourse.slicer.org/u/alex_He)\
**Replies:** 17\
**Last updated:** [January 28, 2026, 5:10am UTC](https://discourse.slicer.org/t/3d-view-in-volume-rendering/45716 "2026-01-28T05:10:43Z")

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I wander is all dicom volume series can have a 3d view display in volume rendering? I find a few volumes cannot display in 3d view

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## [Issues 3D view .vtk model](https://discourse.slicer.org/t/issues-3d-view-vtk-model/47237)

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**Author:** [@Stephan\_Collins](https://discourse.slicer.org/u/Stephan_Collins)\
**Replies:** 15\
**Last updated:** [June 12, 2026, 11:33am UTC](https://discourse.slicer.org/t/issues-3d-view-vtk-model/47237 "2026-06-12T11:33:17Z")

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Dear greatest community of all, I am having issues displaying models whilst segments are looking just fine in 3D view. I am running slicer on linux on a calculation server, never had this kind of troubles before… affec…

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## [Micro-CT Pseudobulb of Orchids: ](https://discourse.slicer.org/t/micro-ct-pseudobulb-of-orchids/46856)

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**Author:** [@Akhmad\_Fauzan](https://discourse.slicer.org/u/Akhmad_Fauzan)\
**Replies:** 14\
**Last updated:** [May 8, 2026, 4:14am UTC](https://discourse.slicer.org/t/micro-ct-pseudobulb-of-orchids/46856 "2026-05-08T04:14:14Z")

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I’m having trouble with my 3D volume rendering. I am currently trying to render a 3D volume of a pseudobulb. The object appears as a thin, flattened disk rather than a full 3D structure. Could this be an issue with the ‘…

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## [Why aren't we building the extensions in parallel?](https://discourse.slicer.org/t/why-arent-we-building-the-extensions-in-parallel/47155)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 10\
**Last updated:** [May 28, 2026, 12:14am UTC](https://discourse.slicer.org/t/why-arent-we-building-the-extensions-in-parallel/47155 "2026-05-28T00:14:14Z")

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When I look at the dashboard for extension and sort them by time, there is a clear pattern. Extensions are build sequentially by the operating system. Is there are reason we are doing that? Can’t they be parallelized? L…

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## [3D Slicer 5.10-11 incompatible extensions - TotalSegmentator, UpperAirwaySegmentator, CADSWholeBodyCTSeg](https://discourse.slicer.org/t/3d-slicer-5-10-11-incompatible-extensions-totalsegmentator-upperairwaysegmentator-cadswholebodyctseg/45047)

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**Author:** [@MaxVs](https://discourse.slicer.org/u/MaxVs)\
**Replies:** 9\
**Last updated:** [January 22, 2026, 9:48pm UTC](https://discourse.slicer.org/t/3d-slicer-5-10-11-incompatible-extensions-totalsegmentator-upperairwaysegmentator-cadswholebodyctseg/45047 "2026-01-22T21:48:30Z")

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Hi guys! Can you tell me whats going on with TotalSegmentator in 5.10 or 5.11 updates? After tones of errors and difficulties with installing dependancies I faced this. I have RTX 4060Ti 8Gb and ryzen 5950x In gen…

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## [2026.04.14 Weekly Meeting](https://discourse.slicer.org/t/2026-04-14-weekly-meeting/46731)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 11\
**Last updated:** [April 20, 2026, 5:30pm UTC](https://discourse.slicer.org/t/2026-04-14-weekly-meeting/46731 "2026-04-20T17:30:47Z")

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Tomorrow, 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: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread to …

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## [Setting segment opacity to \< 1.0 hides segments](https://discourse.slicer.org/t/setting-segment-opacity-to-1-0-hides-segments/46800)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 12\
**Last updated:** [August 12, 2026, 1:24pm UTC](https://discourse.slicer.org/t/setting-segment-opacity-to-1-0-hides-segments/46800 "2026-08-12T13:24:28Z")

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If the opacity of a segment is reduced from the default 1.0, either for the whole segmentation or for the selected segment, the 3D representation does not persist. It appears again if set to 1.0. This is seen in Linux b…

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## [Issues with segmentation pixelation and resolution when using separate Axial/Coronal DICOMs.](https://discourse.slicer.org/t/issues-with-segmentation-pixelation-and-resolution-when-using-separate-axial-coronal-dicoms/45752)

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**Author:** [@teakpAUM](https://discourse.slicer.org/u/teakpAUM)\
**Replies:** 10\
**Last updated:** [March 2, 2026, 6:32pm UTC](https://discourse.slicer.org/t/issues-with-segmentation-pixelation-and-resolution-when-using-separate-axial-coronal-dicoms/45752 "2026-03-02T18:32:07Z")

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I’m working on a project to segment structures within the orbit. I’m using fat suppressed T1 weighted images from a database. The MRI DICOM files are downloaded individually e.g. one will be coronal one will be axial. Bu…

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## [Create a plane that is perpendicular to another plane](https://discourse.slicer.org/t/create-a-plane-that-is-perpendicular-to-another-plane/47307)

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**Author:** [@jsguerra](https://discourse.slicer.org/u/jsguerra)\
**Replies:** 11\
**Last updated:** [June 17, 2026, 5:17pm UTC](https://discourse.slicer.org/t/create-a-plane-that-is-perpendicular-to-another-plane/47307 "2026-06-17T17:17:21Z")

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I’ve created a best fit plane from a point list in the Markups module and I would like to create a second plane perpendicular to the best fit plane. Attached is an example using one of the mouse crania from the SlicerMor…

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## [Margin Tool does not change anything](https://discourse.slicer.org/t/margin-tool-does-not-change-anything/46002)

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**Author:** [@Silver\_Fish](https://discourse.slicer.org/u/Silver_Fish)\
**Replies:** 11\
**Last updated:** [March 6, 2026, 11:07am UTC](https://discourse.slicer.org/t/margin-tool-does-not-change-anything/46002 "2026-03-06T11:07:56Z")

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Hi! I want the brown segmentation shrink a little, and the yellow segmentation grow a little, only on the edges of both segmentations. So I selected “inside all visible segments.” But nothing changes after clicking “App…

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## [Recurring bug on Shoulder tracking](https://discourse.slicer.org/t/recurring-bug-on-shoulder-tracking/47656)

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**Author:** [@AlonsoFigueroa](https://discourse.slicer.org/u/AlonsoFigueroa)\
**Replies:** 12\
**Last updated:** [August 27, 2026, 4:13pm UTC](https://discourse.slicer.org/t/recurring-bug-on-shoulder-tracking/47656 "2026-08-27T16:13:35Z")

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Hello SAM team, We are encountering an issue while tracking a scapula in Autoscoper during an arm elevation task. For one participant, Autoscoper consistently crashes when saving frames within specific ranges of motion…

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## [Auto3dgm landmark placement on invisible parts of mesh ](https://discourse.slicer.org/t/auto3dgm-landmark-placement-on-invisible-parts-of-mesh/45803)

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**Author:** [@raranda22](https://discourse.slicer.org/u/raranda22)\
**Replies:** 13\
**Last updated:** [January 22, 2026, 4:39pm UTC](https://discourse.slicer.org/t/auto3dgm-landmark-placement-on-invisible-parts-of-mesh/45803 "2026-01-22T16:39:06Z")

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Hello Slicer Community, I’m using Auto3dgm on segmented upper beaks from MarkMyBird database, but it appears landmarks are being placed on seemingly invisible parts of the segmented meshes! Here are the original uns…

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## [Extension server is down](https://discourse.slicer.org/t/extension-server-is-down/46478)

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**Author:** [@IVarha](https://discourse.slicer.org/u/IVarha)\
**Replies:** 9\
**Last updated:** [March 17, 2026, 2:51pm UTC](https://discourse.slicer.org/t/extension-server-is-down/46478 "2026-03-17T14:51:10Z")

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Qt\] Update extension information from server failed: timed out while waiting for server response from https://slicer-packages.kitware.com/api/v1/app/5f4474d0e1d8c75dfc705482/extension \[Qt\] “https://extensions.slicer.org…

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## [Reproducing Nifti metadata](https://discourse.slicer.org/t/reproducing-nifti-metadata/46105)

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**Author:** [@Yaroslav\_Plutenko](https://discourse.slicer.org/u/Yaroslav_Plutenko)\
**Replies:** 10\
**Last updated:** [February 20, 2026, 11:12am UTC](https://discourse.slicer.org/t/reproducing-nifti-metadata/46105 "2026-02-20T11:12:07Z")

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Greetings! I have a question regarding Nifti format circulation. I’m developing a plugin that interacts with a remote repository and can upload/download images and whole datasets (viewing and fixing labels on the way if…

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## [2026.06.30 Weekly Meeting](https://discourse.slicer.org/t/2026-06-30-weekly-meeting/47493)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 12\
**Last updated:** [June 30, 2026, 5:20pm UTC](https://discourse.slicer.org/t/2026-06-30-weekly-meeting/47493 "2026-06-30T17:20:01Z")

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Title: 2026.06.30 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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## [TotalSegmentator fails to install PyTorch dependencies – installTorch() got unexpected keyword argument 'torchVisionVersionRequirement'](https://discourse.slicer.org/t/totalsegmentator-fails-to-install-pytorch-dependencies-installtorch-got-unexpected-keyword-argument-torchvisionversionrequirement/46911)

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**Author:** [@Madison\_Golledge](https://discourse.slicer.org/u/Madison_Golledge)\
**Replies:** 9\
**Last updated:** [May 5, 2026, 11:40am UTC](https://discourse.slicer.org/t/totalsegmentator-fails-to-install-pytorch-dependencies-installtorch-got-unexpected-keyword-argument-torchvisionversionrequirement/46911 "2026-05-05T11:40:08Z")

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I’m trying to use the TotalSegmentator extension in 3D Slicer for segmenting an MRI dataset, but I’m running into a consistent error during the dependency installation step. When clicking “Apply” in the TotalSegmentator…

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## [Additional module path disappears after restart](https://discourse.slicer.org/t/additional-module-path-disappears-after-restart/45357)

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**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 11\
**Last updated:** [December 10, 2025, 12:02am UTC](https://discourse.slicer.org/t/additional-module-path-disappears-after-restart/45357 "2025-12-10T00:02:25Z")

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I am adding a new module directory via application settings, but after restart, the added directory disappears. There are no errors relevant to this during application startup. I observe this with both 5.10 and nightly. …

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## [ALPACA error; Version 5.10.0 (stable)](https://discourse.slicer.org/t/alpaca-error-version-5-10-0-stable/46227)

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**Author:** [@juliangallaun](https://discourse.slicer.org/u/juliangallaun)\
**Replies:** 10\
**Last updated:** [February 23, 2026, 5:42pm UTC](https://discourse.slicer.org/t/alpaca-error-version-5-10-0-stable/46227 "2026-02-23T17:42:47Z")

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Hello all, I have a problem opening the ALPACA extension, with the stable version of 3D slicer 5.10.0 . The error code says, it can’t find a certain file. I should have installed all additional extensions to run…

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## [nnInteractive module no longer segments properly](https://discourse.slicer.org/t/nninteractive-module-no-longer-segments-properly/45914)

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**Author:** [@lukejprose](https://discourse.slicer.org/u/lukejprose)\
**Replies:** 11\
**Last updated:** [January 27, 2026, 3:33am UTC](https://discourse.slicer.org/t/nninteractive-module-no-longer-segments-properly/45914 "2026-01-27T03:33:09Z")

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I have been using the nnInteractive module through MorphoCloud to segment CT scans of fish skulls, with a good bit of success. Now, however, the nnInteractive module no longer functions properly. The Configuration tab sa…

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## [Filling skull and orbital holes](https://discourse.slicer.org/t/filling-skull-and-orbital-holes/46831)

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**Author:** [@Bouroumane\_Mohamed\_r](https://discourse.slicer.org/u/Bouroumane_Mohamed_r)\
**Replies:** 10\
**Last updated:** [October 4, 2026, 8:52am UTC](https://discourse.slicer.org/t/filling-skull-and-orbital-holes/46831 "2026-10-04T08:52:01Z")

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Hello dear Slicer Community, It’s a pleasure and honor to post my first message. I’m a beginner using 3D Slicer software. I share with you a case of child craniosynostosis, surgeons asked for a 3D model to plan surger…

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## [Download sample data not working](https://discourse.slicer.org/t/download-sample-data-not-working/45114)

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**Author:** [@PaoloZaffino](https://discourse.slicer.org/u/PaoloZaffino)\
**Replies:** 10\
**Last updated:** [January 18, 2026, 2:45pm UTC](https://discourse.slicer.org/t/download-sample-data-not-working/45114 "2026-01-18T14:45:17Z")

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Hi all, I tried to download some sample data by using the dedicated extension but it keeps downloading and no data is loaded. Paolo

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## [Mac extension builds failing with cout error](https://discourse.slicer.org/t/mac-extension-builds-failing-with-cout-error/46685)

<div class="topic-metadata">

**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 14\
**Last updated:** [April 10, 2026, 7:20pm UTC](https://discourse.slicer.org/t/mac-extension-builds-failing-with-cout-error/46685 "2026-04-10T19:20:50Z")

</div>

We noticed SlicerDMRI and other mac builds today. Looks like python extensions are okay but not C++ ones. Maybe related to the clipboard locale change? @Sam\_Horvath @ebrahim ?

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## [Recommendations for viewing and orienting 2D echocardiography slices in 3D viewer](https://discourse.slicer.org/t/recommendations-for-viewing-and-orienting-2d-echocardiography-slices-in-3d-viewer/46849)

<div class="topic-metadata">

**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 10\
**Last updated:** [May 1, 2026, 8:01pm UTC](https://discourse.slicer.org/t/recommendations-for-viewing-and-orienting-2d-echocardiography-slices-in-3d-viewer/46849 "2026-05-01T20:01:09Z")

</div>

I have DICOM data containing 2D echocardiography time sequence. I want to visualize and orient these in the 3D viewer so that I can overlay them with 3D CT/MRI images from the same patient. What’s the best way to do this…

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## [CTA Willis registration failure](https://discourse.slicer.org/t/cta-willis-registration-failure/45470)

<div class="topic-metadata">

**Author:** [@Peter\_Jan](https://discourse.slicer.org/u/Peter_Jan)\
**Replies:** 12\
**Last updated:** [December 20, 2025, 8:27am UTC](https://discourse.slicer.org/t/cta-willis-registration-failure/45470 "2025-12-20T08:27:00Z")

</div>

Hello everyone, my goal is to register CTA Circle of Willis examinations of two patients acquired with a 4-year interval, using the skull as a reference, in order to evaluate changes in the position of the arterial tree…

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## [2026.07.14 Weekly Meeting](https://discourse.slicer.org/t/2026-07-14-weekly-meeting/47579)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 12\
**Last updated:** [July 17, 2026, 5:38pm UTC](https://discourse.slicer.org/t/2026-07-14-weekly-meeting/47579 "2026-07-17T17:38:47Z")

</div>

Title: 2026.07.14 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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## [DICOM 2D cine MRI is imported as Scalar Volume](https://discourse.slicer.org/t/dicom-2d-cine-mri-is-imported-as-scalar-volume/46792)

<div class="topic-metadata">

**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 13\
**Last updated:** [April 22, 2026, 5:45am UTC](https://discourse.slicer.org/t/dicom-2d-cine-mri-is-imported-as-scalar-volume/46792 "2026-04-22T05:45:55Z")

</div>

I have a DICOM file containing a cine MRI on a single slice of the heart (4-chamber slice). I want this to load as a Sequence. Instead, it is loaded as a scalar volume, so that each time frame is treated as a different z…

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## [V5.10 crash on startup (Splash Screen)](https://discourse.slicer.org/t/v5-10-crash-on-startup-splash-screen/45515)

<div class="topic-metadata">

**Author:** [@GaryPlayer](https://discourse.slicer.org/u/GaryPlayer)\
**Replies:** 9\
**Last updated:** [December 18, 2025, 12:01am UTC](https://discourse.slicer.org/t/v5-10-crash-on-startup-splash-screen/45515 "2025-12-18T00:01:12Z")

</div>

I have a grader that when starting slicer, gets the splash screen and then nothing. (Windows 11) We uninstalled, reinstalled, upgraded to 5.10 Tried to reinstall in a simple directory (no spaces) I tried to run the –…

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## [Odd behavior after adding a moving mask in the ANTs extension](https://discourse.slicer.org/t/odd-behavior-after-adding-a-moving-mask-in-the-ants-extension/46117)

<div class="topic-metadata">

**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 9\
**Last updated:** [March 4, 2026, 5:52pm UTC](https://discourse.slicer.org/t/odd-behavior-after-adding-a-moving-mask-in-the-ants-extension/46117 "2026-03-04T17:52:15Z")

</div>

I’ve been using the ANTs extension for registering two single-label volumes to eachother with good results. In an attempt to improve registration robustness, I started incorporating fixed and moving masks (FM, MM), but …

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## [Nninteractive (slicer client) is stuck](https://discourse.slicer.org/t/nninteractive-slicer-client-is-stuck/47550)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 9\
**Last updated:** [July 7, 2026, 4:37pm UTC](https://discourse.slicer.org/t/nninteractive-slicer-client-is-stuck/47550 "2026-07-07T16:37:59Z")

</div>

It doesn’t pass this stage during the module initialization. This is on ubuntu 24.04 Switch to module: “SlicerNNInteractive” QObject::setParent: Cannot set parent, new parent is in a different thread QObject::setP…

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## [Issues with scaling information added to .tiff volume- tried ImageStacks and saving as .nrrd?](https://discourse.slicer.org/t/issues-with-scaling-information-added-to-tiff-volume-tried-imagestacks-and-saving-as-nrrd/46084)

<div class="topic-metadata">

**Author:** [@alsig](https://discourse.slicer.org/u/alsig)\
**Replies:** 10\
**Last updated:** [February 9, 2026, 12:10am UTC](https://discourse.slicer.org/t/issues-with-scaling-information-added-to-tiff-volume-tried-imagestacks-and-saving-as-nrrd/46084 "2026-02-09T00:10:01Z")

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Hi everyone, I am having a issue when trying to import/save TIFF data in a way that lets me add the scaling information. I have a single file ImageJ hyperstack .tiff that has my entire volume, with X-Y scale of 0.00128…

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## [Trouble loading .nrrd file in Slicer 5.10.0 as sequence](https://discourse.slicer.org/t/trouble-loading-nrrd-file-in-slicer-5-10-0-as-sequence/45239)

<div class="topic-metadata">

**Author:** [@gchampa](https://discourse.slicer.org/u/gchampa)\
**Replies:** 9\
**Last updated:** [December 15, 2025, 2:05am UTC](https://discourse.slicer.org/t/trouble-loading-nrrd-file-in-slicer-5-10-0-as-sequence/45239 "2025-12-15T02:05:14Z")

</div>

when I try and import my .nrrd files as sequences (which they work in slicer 5.8.1) i get an error that slicer cannot read it. They will import as volume but then there is no way to change the colour map, i have tried th…

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## [Slicermorph not on arm64 catalogue](https://discourse.slicer.org/t/slicermorph-not-on-arm64-catalogue/48578)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 12\
**Last updated:** [October 25, 2026, 5:12pm UTC](https://discourse.slicer.org/t/slicermorph-not-on-arm64-catalogue/48578 "2026-10-25T17:12:18Z")

</div>

@ebrahim @Sam\_Horvath looks like MacOS arm64 build is now integrated to the downloads site. Congrats on the milestone. I noticed SlicerMorph is not available for arm64. Any idea why?

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## [Echo Volume Render depth coloring not working](https://discourse.slicer.org/t/echo-volume-render-depth-coloring-not-working/47196)

<div class="topic-metadata">

**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 9\
**Last updated:** [August 20, 2026, 5:55pm UTC](https://discourse.slicer.org/t/echo-volume-render-depth-coloring-not-working/47196 "2026-08-20T17:55:03Z")

</div>

My volume rendering of a 3D echo image does not show depth dependent coloring, like in this demo video: https://www.youtube.com/watch?v=hzxzUILNhnA&list=PLIFpHI5hhxkszTWJTaWDM-eGTR8zBubSA&index=14. I tried adjusting t…

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## [Fast model align does not operate](https://discourse.slicer.org/t/fast-model-align-does-not-operate/48483)

<div class="topic-metadata">

**Author:** [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Replies:** 10\
**Last updated:** [October 14, 2026, 4:50pm UTC](https://discourse.slicer.org/t/fast-model-align-does-not-operate/48483 "2026-10-14T16:50:56Z")

</div>

Hi, in the last stable release, 3D Slicer 5.12.4, the SlicerMorph- FastModelAlign extension does not operate.I know from a previous issue that this extension runs only on the stable release, so when it failed with the 3.…

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## [TIFF volume orientation does not match source STL orientation](https://discourse.slicer.org/t/tiff-volume-orientation-does-not-match-source-stl-orientation/47582)

<div class="topic-metadata">

**Author:** [@tbugajski](https://discourse.slicer.org/u/tbugajski)\
**Replies:** 9\
**Last updated:** [July 15, 2026, 4:08pm UTC](https://discourse.slicer.org/t/tiff-volume-orientation-does-not-match-source-stl-orientation/47582 "2026-07-15T16:08:41Z")

</div>

Hi SAM team, We have been successfully using SAM to create partial volumes from CT segmentations, track these volumes, and apply the resulting transformations to AUT models in MATLAB to visualize motion. We are now try…

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