# Latest

**URL:** https://discourse.slicer.org/latest.md?page=4

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

**Page:** 5

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## [MONAI - A framework for medical machine learning - Training in October 2026](https://discourse.slicer.org/t/monai-a-framework-for-medical-machine-learning-training-in-october-2026/48125)

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**Author:** [@SebGoll](https://discourse.slicer.org/u/SebGoll)\
**Replies:** 0\
**Last updated:** [September 11, 2026, 5:00pm UTC](https://discourse.slicer.org/t/monai-a-framework-for-medical-machine-learning-training-in-october-2026/48125 "2026-09-11T17:00:41Z")

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Dear all, Kitware will be holding a MONAI training courses this October, in Lyon, France and online (Paris time, CEST). October 30, 2026: MONAI Training This course is designed for developers who want to get familiar w…

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## [Build 3D Slicer for MacOS arm64?](https://discourse.slicer.org/t/build-3d-slicer-for-macos-arm64/35699)

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**Author:** [@GeneRisi](https://discourse.slicer.org/u/GeneRisi)\
**Replies:** 32\
**Last updated:** [September 11, 2026, 4:59pm UTC](https://discourse.slicer.org/t/build-3d-slicer-for-macos-arm64/35699 "2026-09-11T16:59:46Z")

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PyTorch has support for using the shaders in the M series chips, but to use it, one has to use the arm64 version of Python. Should a native (in this case, M3) build of Slicer3D be possible? If yes, where should I get the…

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## [How to extract 2D vessels quickly and accurately?](https://discourse.slicer.org/t/how-to-extract-2d-vessels-quickly-and-accurately/40039)

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**Author:** [@jsalas424](https://discourse.slicer.org/u/jsalas424)\
**Replies:** 4\
**Last updated:** [September 11, 2026, 11:53am UTC](https://discourse.slicer.org/t/how-to-extract-2d-vessels-quickly-and-accurately/40039 "2026-09-11T11:53:04Z")

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Hello, I’m trying to segment out the left anterior descending coronary artery from a contrast enhanced XR image. The goal is to calculate the surface area of the vessel, and then compare this longitudinally within patie…

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## [Compatibility with IBM SPSS Statistics](https://discourse.slicer.org/t/compatibility-with-ibm-spss-statistics/48115)

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**Author:** [@epalthek727](https://discourse.slicer.org/u/epalthek727)\
**Replies:** 1\
**Last updated:** [September 11, 2026, 8:29am UTC](https://discourse.slicer.org/t/compatibility-with-ibm-spss-statistics/48115 "2026-09-11T08:29:54Z")

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Hello, I would like to install and use 3D Slicer and IBM SPSS Statistics on the same Windows computer. Could these programs conflict with each other or cause performance or installation issues? Are there any precautions …

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## [Need CT scans with leksell localizer for validating the transformation to leksell frame co-ordinates in my extension](https://discourse.slicer.org/t/need-ct-scans-with-leksell-localizer-for-validating-the-transformation-to-leksell-frame-co-ordinates-in-my-extension/48116)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 0\
**Last updated:** [September 11, 2026, 5:34am UTC](https://discourse.slicer.org/t/need-ct-scans-with-leksell-localizer-for-validating-the-transformation-to-leksell-frame-co-ordinates-in-my-extension/48116 "2026-09-11T05:34:11Z")

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Hi, I am working on an extension in which I have to convert the volumes from RAS co-ordinate system to leksell frame’s XYZ co-ordinate system. I need test data validate my transformation logic. Is there any place where …

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## [Slicer 5.12: Summary, Highlights, and Changelog](https://discourse.slicer.org/t/slicer-5-12-summary-highlights-and-changelog/47540)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 8\
**Last updated:** [September 10, 2026, 8:46pm UTC](https://discourse.slicer.org/t/slicer-5-12-summary-highlights-and-changelog/47540 "2026-09-10T20:46:53Z")

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Summary Highlights Changelog: 5.12.0 Changelog: 5.12.1 Changelog: 5.12.2 Changelog: 5.12.3 Changelog: 5.12.4 Summary Slicer 5.12 is the next stable release after Slicer 5.10. The release focuses on Qt 6 build support, …

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## [Applying boundary constraints to DRR volumes in SlicerAutoscoperM](https://discourse.slicer.org/t/applying-boundary-constraints-to-drr-volumes-in-slicerautoscoperm/48106)

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**Author:** [@Dorte](https://discourse.slicer.org/u/Dorte)\
**Replies:** 1\
**Last updated:** [September 10, 2026, 7:22am UTC](https://discourse.slicer.org/t/applying-boundary-constraints-to-drr-volumes-in-slicerautoscoperm/48106 "2026-09-10T07:22:41Z")

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Hello Slicer team and Slicer community, I’m working with monoplanar videoradiography, and I’m trying to reduce depth ambiguity during bone tracking. I was wondering whether SlicerAutoscoperM allows applying geometric o…

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## [3D Slicer Online Training in Fall 2026](https://discourse.slicer.org/t/3d-slicer-online-training-in-fall-2026/48105)

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**Author:** [@SebGoll](https://discourse.slicer.org/u/SebGoll)\
**Replies:** 0\
**Last updated:** [September 9, 2026, 2:19pm UTC](https://discourse.slicer.org/t/3d-slicer-online-training-in-fall-2026/48105 "2026-09-09T14:19:23Z")

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Dear all, Kitware will be holding two 3D Slicer training courses this fall, in Lyon, France and online (Paris time, CET). September 30, 2026: 3D Slicer for Users This course is designed for users who want to get famili…

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## [MouseMaster Extension "module is not loaded"](https://discourse.slicer.org/t/mousemaster-extension-module-is-not-loaded/48099)

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**Author:** [@jamie.miller.phd](https://discourse.slicer.org/u/jamie.miller.phd)\
**Replies:** 3\
**Last updated:** [September 9, 2026, 2:10am UTC](https://discourse.slicer.org/t/mousemaster-extension-module-is-not-loaded/48099 "2026-09-09T02:10:53Z")

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Problem report for 3D Slicer 5.12.3 win-amd64: Trying to use the MouseMaster extension, but after downloading from extension manager, and installing from file, there is a error message in the module finder “MouseMaster m…

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## [2026.09.08 Weekly Meeting](https://discourse.slicer.org/t/2026-09-08-weekly-meeting/48093)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 3\
**Last updated:** [September 8, 2026, 5:16pm UTC](https://discourse.slicer.org/t/2026-09-08-weekly-meeting/48093 "2026-09-08T17:16:18Z")

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Title: 2026.09.08 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 8, 2…

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## [Whole adult woman body ct scan and mri?](https://discourse.slicer.org/t/whole-adult-woman-body-ct-scan-and-mri/48054)

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**Author:** [@Melodicpinpon](https://discourse.slicer.org/u/Melodicpinpon)\
**Replies:** 4\
**Last updated:** [September 8, 2026, 1:51pm UTC](https://discourse.slicer.org/t/whole-adult-woman-body-ct-scan-and-mri/48054 "2026-09-08T13:51:50Z")

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Hi everyone, Can anyone please tell me where I could download a whole (young healthy) adult woman body ct scan and mri? I would be used to start building a libre 3D atlas of the woman’s anatomy.

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## [4D NifTi flipped and rotated about 90-deg](https://discourse.slicer.org/t/4d-nifti-flipped-and-rotated-about-90-deg/48056)

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**Author:** [@SeunO](https://discourse.slicer.org/u/SeunO)\
**Replies:** 2\
**Last updated:** [September 8, 2026, 12:09pm UTC](https://discourse.slicer.org/t/4d-nifti-flipped-and-rotated-about-90-deg/48056 "2026-09-08T12:09:25Z")

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Hi everyone, Whilst working with some NifTi files, all regular 3DNifti’s seem to match between my application and 3D-Slicer. However, I noticed that the 4D NifTi file I’m working with seems to be flipped in 3D-Slicer ra…

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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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## [How to compute bifurcation angles in Slicer?](https://discourse.slicer.org/t/how-to-compute-bifurcation-angles-in-slicer/25577)

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**Author:** [@tim](https://discourse.slicer.org/u/tim)\
**Replies:** 2\
**Last updated:** [September 4, 2026, 7:39pm UTC](https://discourse.slicer.org/t/how-to-compute-bifurcation-angles-in-slicer/25577 "2026-09-04T19:39:48Z")

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Hi, my goal is to compute centerlines, diameters and bifurcation angles of a vascular tree using Slicer and its Python interactor. I managed to compute both centerlines and diameters using the vmtk scripted modules. H…

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## [Soft-tissue segmentation: advice needed](https://discourse.slicer.org/t/soft-tissue-segmentation-advice-needed/48060)

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**Author:** [@Toumia\_Bessedik](https://discourse.slicer.org/u/Toumia_Bessedik)\
**Replies:** 0\
**Last updated:** [September 3, 2026, 10:20pm UTC](https://discourse.slicer.org/t/soft-tissue-segmentation-advice-needed/48060 "2026-09-03T22:20:55Z")

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Hello, I would like to get your opinion on an approach I am currently using to refine the segmentation of soft tissues in a head MRI. I used TotalSegmentator (MR) to automatically segment the soft tissues, particularly…

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## [Segmentations Module - Opacity Issue](https://discourse.slicer.org/t/segmentations-module-opacity-issue/48044)

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**Author:** [@Malaquias\_Cerrillo](https://discourse.slicer.org/u/Malaquias_Cerrillo)\
**Replies:** 2\
**Last updated:** [September 3, 2026, 5:15pm UTC](https://discourse.slicer.org/t/segmentations-module-opacity-issue/48044 "2026-09-03T17:15:34Z")

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Hi everybody, i’m experiencing some trouble in the latest version 5.12.3 trying to shift the opacity of the different segmentations. However, I can shift the overall opacity of de segmentation node, does this happens to …

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## [Resetting a transform in an existing node](https://discourse.slicer.org/t/resetting-a-transform-in-an-existing-node/48040)

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**Author:** [@shai-ikko](https://discourse.slicer.org/u/shai-ikko)\
**Replies:** 1\
**Last updated:** [September 2, 2026, 3:02pm UTC](https://discourse.slicer.org/t/resetting-a-transform-in-an-existing-node/48040 "2026-09-02T15:02:19Z")

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Hi, In my extension, in some context, I need to reset a transform to Identity, without changing its node otherwise (that is, I need to keep its state wrt volumes, display-nodes etc). When I first wrote this, a few years…

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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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## [2026.09.01 Weekly Meeting](https://discourse.slicer.org/t/2026-09-01-weekly-meeting/47984)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 1\
**Last updated:** [September 1, 2026, 1:39pm UTC](https://discourse.slicer.org/t/2026-09-01-weekly-meeting/47984 "2026-09-01T13:39:55Z")

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Title: 2026.09.01 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 1, 2…

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## [RF data streaming from the BK Activ](https://discourse.slicer.org/t/rf-data-streaming-from-the-bk-activ/48025)

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**Author:** [@J.vd.Zee](https://discourse.slicer.org/u/J.vd.Zee)\
**Replies:** 2\
**Last updated:** [August 31, 2026, 7:26pm UTC](https://discourse.slicer.org/t/rf-data-streaming-from-the-bk-activ/48025 "2026-08-31T19:26:01Z")

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We would like to perform research on the raw RF data acquired with a BK Activ ultrasound scanner, with the aim of developing and evaluating methods for improving ultrasound image quality. Could anyone advise us on: whi…

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## [Spect Ct Reconstruction ](https://discourse.slicer.org/t/spect-ct-reconstruction/48001)

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**Author:** [@JuanIgnacioElutchanz](https://discourse.slicer.org/u/JuanIgnacioElutchanz)\
**Replies:** 3\
**Last updated:** [August 30, 2026, 3:47pm UTC](https://discourse.slicer.org/t/spect-ct-reconstruction/48001 "2026-08-30T15:47:13Z")

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Hello everyone, I need some help in terms of spect reconstruction in 3dSlicer. I’m student of Nuclear Medicine in Uruguay, I’m currently working on a research project to present at the Uruguayan Con…

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## [Load Failed over multiple formats (TIFF, NRRD)](https://discourse.slicer.org/t/load-failed-over-multiple-formats-tiff-nrrd/48018)

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**Author:** [@asims](https://discourse.slicer.org/u/asims)\
**Replies:** 4\
**Last updated:** [August 30, 2026, 5:30am UTC](https://discourse.slicer.org/t/load-failed-over-multiple-formats-tiff-nrrd/48018 "2026-08-30T05:30:07Z")

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Hi I have an image stack to load which was provided to me as a series of TIFF files. These can be successfully opened in 3rd party tools such as ImageJ (Fiji) and GIMP. However there is a warning message about the descr…

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## [Adjusting position of markups text](https://discourse.slicer.org/t/adjusting-position-of-markups-text/48014)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 2\
**Last updated:** [August 30, 2026, 1:08am UTC](https://discourse.slicer.org/t/adjusting-position-of-markups-text/48014 "2026-08-30T01:08:14Z")

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I use markups quite often to illustrate CT findings. It would be very helpful if the text within markups could be easily repositioned. At present, it can be difficult to read when the text overlaps with anatomical struct…

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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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## [Aligning STL anatomical models with MRI segmentations in 3D Slicer](https://discourse.slicer.org/t/aligning-stl-anatomical-models-with-mri-segmentations-in-3d-slicer/47983)

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**Author:** [@Toumia\_Bessedik](https://discourse.slicer.org/u/Toumia_Bessedik)\
**Replies:** 5\
**Last updated:** [November 9, 2026, 3:53pm UTC](https://discourse.slicer.org/t/aligning-stl-anatomical-models-with-mri-segmentations-in-3d-slicer/47983 "2026-11-09T15:53:04Z")

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Hi, I am working with an MRI of the head and I have existing STL models for several anatomical domains, including the skull, brain, soft tissue (ST), etc. I would like to use these STL models as references and align th…

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## [Question on Segmentation and Smoothing a Gecko Skull](https://discourse.slicer.org/t/question-on-segmentation-and-smoothing-a-gecko-skull/47990)

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**Author:** [@GBurkin](https://discourse.slicer.org/u/GBurkin)\
**Replies:** 2\
**Last updated:** [August 26, 2026, 6:51pm UTC](https://discourse.slicer.org/t/question-on-segmentation-and-smoothing-a-gecko-skull/47990 "2026-08-26T18:51:15Z")

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Hello, I’m working with CT scans of small geckos, and I’m working on segmenting their skulls and full skeletons. I have mostly taught myself how to segment via YouTube and help pages, but most of these are focused on hu…

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## [How to segment bad quality 4D MRI FLOW](https://discourse.slicer.org/t/how-to-segment-bad-quality-4d-mri-flow/47975)

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**Author:** [@VERRUCKT](https://discourse.slicer.org/u/VERRUCKT)\
**Replies:** 1\
**Last updated:** [August 26, 2026, 1:24pm UTC](https://discourse.slicer.org/t/how-to-segment-bad-quality-4d-mri-flow/47975 "2026-08-26T13:24:14Z")

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Hi everyone :slight\_smile: I’m working on aortic segmentation from 4D flow MRI. I’ve been using TotalSegmentator but results are poor, I assume mostly a domain issue, since it’s CT-trained, plus the low SNR of my data. …

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## [Extension Manager does not launch on Win 11 (Slicer 5.12.3)](https://discourse.slicer.org/t/extension-manager-does-not-launch-on-win-11-slicer-5-12-3/47935)

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**Author:** [@dumichgh](https://discourse.slicer.org/u/dumichgh)\
**Replies:** 3\
**Last updated:** [August 24, 2026, 12:37pm UTC](https://discourse.slicer.org/t/extension-manager-does-not-launch-on-win-11-slicer-5-12-3/47935 "2026-08-24T12:37:25Z")

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Problem report for 3D Slicer 5.12.3 win-amd64: \[please describe expected and actual behavior\] Extension manager does not launch on Windows 11 system after 30min Log: \[DEBUG\]\[Qt\] 19.08.2026 17:14:18 \[\] (unknown:0) - S…

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