# Latest

**URL:** https://discourse.slicer.org/latest.md?page=1

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

**Page:** 2

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## [Short survey for SlicerROS2 users (and potential users)](https://discourse.slicer.org/t/short-survey-for-slicerros2-users-and-potential-users/48696)

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**Author:** [@LauraConnolly](https://discourse.slicer.org/u/LauraConnolly)\
**Replies:** 0\
**Last updated:** [November 3, 2026, 7:17pm UTC](https://discourse.slicer.org/t/short-survey-for-slicerros2-users-and-potential-users/48696 "2026-11-03T19:17:07Z")

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Hi Slicer Community! We’re hoping to learn more about how people are using SlicerROS2 (https://ieeexplore.ieee.org/document/10684721), and about people who haven’t used it yet but are interested in connecting Slicer to r…

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## [2026.11.03 Weekly Meeting](https://discourse.slicer.org/t/2026-11-03-weekly-meeting/48633)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 6\
**Last updated:** [November 3, 2026, 3:18pm UTC](https://discourse.slicer.org/t/2026-11-03-weekly-meeting/48633 "2026-11-03T15:18:10Z")

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Title: 2026.11.03 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · November 3, 2026 10:00 AM (Americ…

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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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## [Help to Segment Small Intestine ](https://discourse.slicer.org/t/help-to-segment-small-intestine/48653)

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**Author:** [@Randy\_Peterson](https://discourse.slicer.org/u/Randy_Peterson)\
**Replies:** 4\
**Last updated:** [November 2, 2026, 8:26pm UTC](https://discourse.slicer.org/t/help-to-segment-small-intestine/48653 "2026-11-02T20:26:30Z")

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I am a Neuroendocrine cancer patient with a partial bowel obstruction in my small intestine. I have several CT scans of the area where the obstruction is located. I want to create a 3-D model to aid in surgical planning…

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## [Slicer.org is down](https://discourse.slicer.org/t/slicer-org-is-down/7159)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 11\
**Last updated:** [November 2, 2026, 5:51pm UTC](https://discourse.slicer.org/t/slicer-org-is-down/7159 "2026-11-02T17:51:32Z")

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www.slicer.org and issues.slicer.org are down. Could somebody have a look? @freephile @pieper @jcfr

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## [3D Slicer fibular cutting plane for Mandible reconstruction](https://discourse.slicer.org/t/3d-slicer-fibular-cutting-plane-for-mandible-reconstruction/48675)

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**Author:** [@Paveen\_Tangngamsakul](https://discourse.slicer.org/u/Paveen_Tangngamsakul)\
**Replies:** 0\
**Last updated:** [November 2, 2026, 4:12pm UTC](https://discourse.slicer.org/t/3d-slicer-fibular-cutting-plane-for-mandible-reconstruction/48675 "2026-11-02T16:12:26Z")

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I cannot create fibula cutting plane (after solidify the model, close all holes, create mandibular plane again and again, re-write fibula line), Can anyone help?

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## [How to segment intact lumen and vessel wall in 3d slicer?](https://discourse.slicer.org/t/how-to-segment-intact-lumen-and-vessel-wall-in-3d-slicer/2531)

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**Author:** [@Bio\_Medical](https://discourse.slicer.org/u/Bio_Medical)\
**Replies:** 6\
**Last updated:** [November 2, 2026, 2:03pm UTC](https://discourse.slicer.org/t/how-to-segment-intact-lumen-and-vessel-wall-in-3d-slicer/2531 "2026-11-02T14:03:17Z")

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I want to create lumen and plaque inside an arterial wall(similar to the structure in attached file).So it will be a hollow wall and lumen inside it(fixed,no spaces between them).How can i do it in slicer?

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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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## [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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## [3D Slicer doesn’t start after Windows Install](https://discourse.slicer.org/t/3d-slicer-doesn-t-start-after-windows-install/47482)

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**Author:** [@Randy\_Peterson](https://discourse.slicer.org/u/Randy_Peterson)\
**Replies:** 2\
**Last updated:** [October 30, 2026, 1:29am UTC](https://discourse.slicer.org/t/3d-slicer-doesn-t-start-after-windows-install/47482 "2026-10-30T01:29:05Z")

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3D Slicer doesn’t start after Windows Install. No Error message- just nothing happens. I am using a Lenovo L5 PC, which has the power to run this. I tried: Creating a C:\\slicer folder and installing there. Same issue. …

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## [Workflow Advice: Preclinical rat brain CT hemispheric volumetry](https://discourse.slicer.org/t/workflow-advice-preclinical-rat-brain-ct-hemispheric-volumetry/48643)

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**Author:** [@kbroeren](https://discourse.slicer.org/u/kbroeren)\
**Replies:** 0\
**Last updated:** [October 29, 2026, 7:56pm UTC](https://discourse.slicer.org/t/workflow-advice-preclinical-rat-brain-ct-hemispheric-volumetry/48643 "2026-10-29T19:56:25Z")

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Hello, I am working with micro-CT scans of rat brains to quantify hemispheric tissue loss following Controlled Cortical Impact using the method: % Tissue loss = (Vcontra-V ipsi)/(V contra). There are three specific step…

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## [Error when running watershed](https://discourse.slicer.org/t/error-when-running-watershed/48557)

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**Author:** [@jsguerra](https://discourse.slicer.org/u/jsguerra)\
**Replies:** 3\
**Last updated:** [October 29, 2026, 2:12pm UTC](https://discourse.slicer.org/t/error-when-running-watershed/48557 "2026-10-29T14:12:53Z")

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I’m trying to use watershed segmentation (5.12.4 on Win10) and I get a segmentation fail message. This is what I get on detials: Traceback (most recent call last): File “C:\\Users/JSG/AppData/Local/slicer.org/3D Slicer…

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## [2026.10.27 Weekly Meeting](https://discourse.slicer.org/t/2026-10-27-weekly-meeting/48559)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 5\
**Last updated:** [October 27, 2026, 2:41pm UTC](https://discourse.slicer.org/t/2026-10-27-weekly-meeting/48559 "2026-10-27T14:41:31Z")

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Title: 2026.10.27 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 10:30 AM ET. (Note the different end time!) Anyone is welcome to join at this link: Google Meet meeting 📅…

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

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**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")

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@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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## [Working with RGBA in Volume Rendering](https://discourse.slicer.org/t/working-with-rgba-in-volume-rendering/44814)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 18\
**Last updated:** [October 25, 2026, 12:20pm UTC](https://discourse.slicer.org/t/working-with-rgba-in-volume-rendering/44814 "2026-10-25T12:20:42Z")

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I am trying to import some multichannel microscopy data into Slicer. I can get the RGBA volume loaded and shown correctly in the slice views. But when I volume render it (by dragging and dropping into the 3D view), all …

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## [Extentions cant be loaded](https://discourse.slicer.org/t/extentions-cant-be-loaded/48592)

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**Author:** [@DrAssadawy](https://discourse.slicer.org/u/DrAssadawy)\
**Replies:** 1\
**Last updated:** [October 25, 2026, 8:00am UTC](https://discourse.slicer.org/t/extentions-cant-be-loaded/48592 "2026-10-25T08:00:20Z")

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connection time out

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## [2026.10.20 Weekly Meeting](https://discourse.slicer.org/t/2026-10-20-weekly-meeting/48514)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 8\
**Last updated:** [October 21, 2026, 1:49am UTC](https://discourse.slicer.org/t/2026-10-20-weekly-meeting/48514 "2026-10-21T01:49:31Z")

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Title: 2026.10.20 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 20, 20…

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## [Help Registering MRI Images and Segmentation in 3D Slicer](https://discourse.slicer.org/t/help-registering-mri-images-and-segmentation-in-3d-slicer/48539)

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**Author:** [@cv24](https://discourse.slicer.org/u/cv24)\
**Replies:** 2\
**Last updated:** [October 20, 2026, 2:31pm UTC](https://discourse.slicer.org/t/help-registering-mri-images-and-segmentation-in-3d-slicer/48539 "2026-10-20T14:31:18Z")

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I am trying to register two shoulder MRI images acquired from the same participant. One image has a manually segmented region of cartilage, while the other image does not have a segmentation. I need to align the two imag…

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## [Call for participation in the SOFA Week 2026](https://discourse.slicer.org/t/call-for-participation-in-the-sofa-week-2026/48553)

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**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 0\
**Last updated:** [October 20, 2026, 2:02pm UTC](https://discourse.slicer.org/t/call-for-participation-in-the-sofa-week-2026/48553 "2026-10-20T14:02:23Z")

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:robot: This post was written with AI assistance. Dear Slicer Community, As many of you know, the 3D Slicer and SOFA communities have been working together on the SlicerSOFA extension, which brings the simulation cap…

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## [PRISMrendering not loading](https://discourse.slicer.org/t/prismrendering-not-loading/48550)

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**Author:** [@Atticus](https://discourse.slicer.org/u/Atticus)\
**Replies:** 1\
**Last updated:** [October 19, 2026, 3:14pm UTC](https://discourse.slicer.org/t/prismrendering-not-loading/48550 "2026-10-19T15:14:21Z")

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Hi! As the title says, the PRISMrendering module appears in red boldface in the module finder and it only displays “PRISMRendering module is not loaded” I installed it from the Extension Manager and restarted 3DSlicer …

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## [SlicerRT blocked by Windows Smart App Control in Slicer 5.12.4](https://discourse.slicer.org/t/slicerrt-blocked-by-windows-smart-app-control-in-slicer-5-12-4/48534)

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**Author:** [@hipresearch\_jp](https://discourse.slicer.org/u/hipresearch_jp)\
**Replies:** 4\
**Last updated:** [October 16, 2026, 8:20pm UTC](https://discourse.slicer.org/t/slicerrt-blocked-by-windows-smart-app-control-in-slicer-5-12-4/48534 "2026-10-16T20:20:59Z")

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Hello SlicerRT team, I’m setting up SlicerRT to generate DRRs for orthopedic CT research. On a fresh installation of Slicer 5.12.4 (revision 34645), with SlicerRT installed through the Extensions Manager, Windows Smart …

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## [After midline mirroring of the ROI, how to edit the resulting mirrored region?](https://discourse.slicer.org/t/after-midline-mirroring-of-the-roi-how-to-edit-the-resulting-mirrored-region/48525)

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**Author:** [@Gargantua](https://discourse.slicer.org/u/Gargantua)\
**Replies:** 4\
**Last updated:** [October 16, 2026, 3:32pm UTC](https://discourse.slicer.org/t/after-midline-mirroring-of-the-roi-how-to-edit-the-resulting-mirrored-region/48525 "2026-10-16T15:32:00Z")

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For the obtained mirrored region, can areas with HU values less than 20 be ignored using the threshold function, or erased with the eraser tool?

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## [Getting Started with 3D Slicer for Medical Imaging](https://discourse.slicer.org/t/getting-started-with-3d-slicer-for-medical-imaging/48526)

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**Author:** [@Nick\_Bearup](https://discourse.slicer.org/u/Nick_Bearup)\
**Replies:** 0\
**Last updated:** [October 15, 2026, 6:44pm UTC](https://discourse.slicer.org/t/getting-started-with-3d-slicer-for-medical-imaging/48526 "2026-10-15T18:44:18Z")

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Kitware is hosting a free webinar on Getting Started with 3D Slicer for Medical Imaging on Wednesday, October 21st, from 12 - 1 PM ET. In this webinar, Kitware’s Sam Horvath and Ebrahim Ebrahim will walk through the fun…

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## [AI driven upper airway analysis](https://discourse.slicer.org/t/ai-driven-upper-airway-analysis/48443)

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**Author:** [@Algiz](https://discourse.slicer.org/u/Algiz)\
**Replies:** 3\
**Last updated:** [October 15, 2026, 3:55pm UTC](https://discourse.slicer.org/t/ai-driven-upper-airway-analysis/48443 "2026-10-15T15:55:12Z")

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Hello! I am trying to analyze my own cbct scan using 3d slicer and it is a very interesting program. some extensions have already helped me segment the airway and do a rudimentary airway analysis to determine the narr…

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## [Dose Calculating alogorithm and calibration curve for Slicer-RT data](https://discourse.slicer.org/t/dose-calculating-alogorithm-and-calibration-curve-for-slicer-rt-data/48451)

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**Author:** [@Rafael\_Scatena](https://discourse.slicer.org/u/Rafael_Scatena)\
**Replies:** 1\
**Last updated:** [October 15, 2026, 1:57pm UTC](https://discourse.slicer.org/t/dose-calculating-alogorithm-and-calibration-curve-for-slicer-rt-data/48451 "2026-10-15T13:57:23Z")

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Hi, I hope this message finds you well. I am using the SlicerRT project in my research on Monte Carlo dose calculation in anthropomorphic phantoms, and I am particularly interested in the dataset eclipse-8.1.20-phantom…

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## [Updates to slicer-packages.kitware.com in progress](https://discourse.slicer.org/t/updates-to-slicer-packages-kitware-com-in-progress/48518)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [October 14, 2026, 9:21pm UTC](https://discourse.slicer.org/t/updates-to-slicer-packages-kitware-com-in-progress/48518 "2026-10-14T21:21:47Z")

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The Kitware team is applying updates to the package server infrastructure, which will result in intermittent downtime of the package server, and (worst case) may cause issues with uploading packages for the upcoming nigh…

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## [Scissors in Segment Editor module seriously lagged in Slicer 5.10.0](https://discourse.slicer.org/t/scissors-in-segment-editor-module-seriously-lagged-in-slicer-5-10-0/46364)

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**Author:** [@VincentYu](https://discourse.slicer.org/u/VincentYu)\
**Replies:** 3\
**Last updated:** [October 14, 2026, 7:46pm UTC](https://discourse.slicer.org/t/scissors-in-segment-editor-module-seriously-lagged-in-slicer-5-10-0/46364 "2026-10-14T19:46:03Z")

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Operating system: Windwos 11; Slicer version: 5.10.0 Recently I update Slicer from 5.8.1 to 5.10.0, and I found that sometimes the scissors in Segment Editor took very long computing time. After several small experimen…

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## [Mandible Reconstruction with Fibula Free Flap Videotutorial](https://discourse.slicer.org/t/mandible-reconstruction-with-fibula-free-flap-videotutorial/48501)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 1\
**Last updated:** [October 14, 2026, 6:15pm UTC](https://discourse.slicer.org/t/mandible-reconstruction-with-fibula-free-flap-videotutorial/48501 "2026-10-14T18:15:45Z")

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Hi, I’m engineer Mauro Dominguez. I’d like to share these videotutorials for BoneReconstructionPlanner, a 3D Slicer extension for virtual surgical planning of mandibular reconstruction with vascularized fibula free flap…

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

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**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")

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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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## [PyTorch CUDA incompatibility with NVIDIA RTX 5070 Ti ](https://discourse.slicer.org/t/pytorch-cuda-incompatibility-with-nvidia-rtx-5070-ti/43233)

<div class="topic-metadata">

**Author:** [@rodrigot](https://discourse.slicer.org/u/rodrigot)\
**Replies:** 6\
**Last updated:** [October 14, 2026, 4:03pm UTC](https://discourse.slicer.org/t/pytorch-cuda-incompatibility-with-nvidia-rtx-5070-ti/43233 "2026-10-14T16:03:25Z")

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Hello everyone, I’m currently using a 3D Slicer (version 5.9.0-2025-06-03) on Ubuntu Linux. I have an NVIDIA GeForce RTX 5070 Ti GPU installed. When launching Slicer, I’m consistently seeing the following UserWarning i…

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