# Latest

**URL:** https://discourse.slicer.org/latest.md?page=23

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

**Page:** 24

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## [How to improve surface model quality when visualizing brain ROI masks in 3D Slicer](https://discourse.slicer.org/t/how-to-improve-surface-model-quality-when-visualizing-brain-roi-masks-in-3d-slicer/45985)

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**Author:** [@younghoo](https://discourse.slicer.org/u/younghoo)\
**Replies:** 5\
**Last updated:** [February 1, 2026, 2:24pm UTC](https://discourse.slicer.org/t/how-to-improve-surface-model-quality-when-visualizing-brain-roi-masks-in-3d-slicer/45985 "2026-02-01T14:24:41Z")

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Dear experts, I am trying to visualize a set of white matter tract masks in 3D using 3D Slicer. My current workflow involves loading the masks as segmentations and then using the “Export visible segments to models” tool…

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## [Segmenting cortical and cancellous bone from spinal ct scan](https://discourse.slicer.org/t/segmenting-cortical-and-cancellous-bone-from-spinal-ct-scan/46001)

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**Author:** [@Jamielynn\_Lu](https://discourse.slicer.org/u/Jamielynn_Lu)\
**Replies:** 3\
**Last updated:** [January 31, 2026, 12:21pm UTC](https://discourse.slicer.org/t/segmenting-cortical-and-cancellous-bone-from-spinal-ct-scan/46001 "2026-01-31T12:21:23Z")

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Hello I am trying to find the best way to differentiate between cancellous and cortical bone in my vertebrae for a FEA. I am having a hard time thresholding to create the different bone textures as my scan isn’t the best…

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## [3D Volume Reconstruction from 2D Ultrasound Slices](https://discourse.slicer.org/t/3d-volume-reconstruction-from-2d-ultrasound-slices/43658)

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**Author:** [@martina\_paccini](https://discourse.slicer.org/u/martina_paccini)\
**Replies:** 5\
**Last updated:** [January 31, 2026, 1:31am UTC](https://discourse.slicer.org/t/3d-volume-reconstruction-from-2d-ultrasound-slices/43658 "2026-01-31T01:31:46Z")

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Operating system: Windows Slicer version: 5.8.1 Expected behavior: volume reconstruction and rendering Actual behavior: crash Hi everyone, I’m quite new to 3D Slicer and this community. I’m trying to reconstruct a 3…

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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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## [Changing precision](https://discourse.slicer.org/t/changing-precision/45987)

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**Author:** [@dpvaldes](https://discourse.slicer.org/u/dpvaldes)\
**Replies:** 7\
**Last updated:** [January 30, 2026, 1:29pm UTC](https://discourse.slicer.org/t/changing-precision/45987 "2026-01-30T13:29:38Z")

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Is there any way I can change the precision of my voxel signal? Not just for displaying the values but actually changing precision. I have voxels with very small values (10\*\*(-7)) and I want them rounded to 3 decimals. …

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## [Visual DICOM browser update](https://discourse.slicer.org/t/visual-dicom-browser-update/45998)

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**Author:** [@Davide\_Punzo](https://discourse.slicer.org/u/Davide_Punzo)\
**Replies:** 1\
**Last updated:** [January 30, 2026, 1:09pm UTC](https://discourse.slicer.org/t/visual-dicom-browser-update/45998 "2026-01-30T13:09:40Z")

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Hey everyone, I have been working on major improvements to the visual DICOM browser: :bullseye: What’s New Performance for large datasets (both remote and local) Optimized for \>100GB databases Lazy thumbnail gener…

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## [Customizing Slicer 3d toolbar](https://discourse.slicer.org/t/customizing-slicer-3d-toolbar/13545)

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**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 7\
**Last updated:** [January 30, 2026, 6:15am UTC](https://discourse.slicer.org/t/customizing-slicer-3d-toolbar/13545 "2026-01-30T06:15:04Z")

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How to customize slicer in-built toolbar? I want to hide some in=built buttons in toolbar and add custom buttons into it?

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## ["Color Scalar Bar" reworked and upgraded, now it’s called "Color Legend"](https://discourse.slicer.org/t/color-scalar-bar-reworked-and-upgraded-now-it-s-called-color-legend/21567)

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**Author:** [@Mik](https://discourse.slicer.org/u/Mik)\
**Replies:** 15\
**Last updated:** [January 30, 2026, 5:19am UTC](https://discourse.slicer.org/t/color-scalar-bar-reworked-and-upgraded-now-it-s-called-color-legend/21567 "2026-01-30T05:19:41Z")

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Starting from version 30530 build 2022-01-15 “Color Scalar Bar” section from “Colors” module was replaced with “Color Legend” section. The “Color Legend” section has been also added to the “Volume”, “Model” and “Markups…

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## [Landmark to .ply misalignment when reloaded for editing](https://discourse.slicer.org/t/landmark-to-ply-misalignment-when-reloaded-for-editing/45995)

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**Author:** [@emmm\_m](https://discourse.slicer.org/u/emmm_m)\
**Replies:** 5\
**Last updated:** [January 30, 2026, 3:38am UTC](https://discourse.slicer.org/t/landmark-to-ply-misalignment-when-reloaded-for-editing/45995 "2026-01-30T03:38:48Z")

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When I reload a saved markup file to it’s original .ply file to adjust a point which was incorrectly placed, the points appear entirely offset from the orientation of the scan. It appears as though the points are at abou…

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## [Bone Thickness Mapping not functioning](https://discourse.slicer.org/t/bone-thickness-mapping-not-functioning/29453)

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**Author:** [@damiazlkflee](https://discourse.slicer.org/u/damiazlkflee)\
**Replies:** 2\
**Last updated:** [January 29, 2026, 7:17pm UTC](https://discourse.slicer.org/t/bone-thickness-mapping-not-functioning/29453 "2026-01-29T19:17:17Z")

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Operating system: Windows 10 Slicer version: 5.2.2 Expected behavior: Bone thickness map Extension complete execute Actual behavior: did not execute I used the bone thickness map extension on my mesh in 3Dslicer vers…

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## [BoneThicknessMapping does not work](https://discourse.slicer.org/t/bonethicknessmapping-does-not-work/30738)

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**Author:** [@Yanglab](https://discourse.slicer.org/u/Yanglab)\
**Replies:** 1\
**Last updated:** [January 29, 2026, 7:15pm UTC](https://discourse.slicer.org/t/bonethicknessmapping-does-not-work/30738 "2026-01-29T19:15:45Z")

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Hi guys, I’m try to use bone thickness mapping on my own data and demo data (Predentalsurgery). But none of them worked. The status kept showing Initializing execution, and the process was permanantly 0%. When I check…

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## [Segment overlap versus 3D view](https://discourse.slicer.org/t/segment-overlap-versus-3d-view/45984)

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**Author:** [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Replies:** 3\
**Last updated:** [January 29, 2026, 5:38pm UTC](https://discourse.slicer.org/t/segment-overlap-versus-3d-view/45984 "2026-01-29T17:38:04Z")

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Two segments. 3D view when segments overlap, and larger segment (segment 1) is 50% transparent: 3D view when smaller segment is subtracted from larger segment (segment 1). Larger segment is 50% transparent: Why …

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## [Missing menu items from Slicer Application macOS Ventura](https://discourse.slicer.org/t/missing-menu-items-from-slicer-application-macos-ventura/45983)

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**Author:** [@juliangallaun](https://discourse.slicer.org/u/juliangallaun)\
**Replies:** 2\
**Last updated:** [January 29, 2026, 2:09pm UTC](https://discourse.slicer.org/t/missing-menu-items-from-slicer-application-macos-ventura/45983 "2026-01-29T14:09:41Z")

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Hi, I seem to have the same problem as in a previous topic (Missing menu items from Slicer Application Main Window link), the Slicer’s Main Application menu seems to be missing (File, Edit, View and Help). see below I …

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## [Slice, resample and export along an oblique plane](https://discourse.slicer.org/t/slice-resample-and-export-along-an-oblique-plane/45967)

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**Author:** [@N-Van](https://discourse.slicer.org/u/N-Van)\
**Replies:** 5\
**Last updated:** [January 28, 2026, 5:43pm UTC](https://discourse.slicer.org/t/slice-resample-and-export-along-an-oblique-plane/45967 "2026-01-28T17:43:44Z")

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Hi, new here. I’m processing CT scan data and I need to extract a resampled, arbitrarily oriented, cross section of my volume. I need a slice that doesn’t show artifacts/stripes, and I need it with the same resolution a…

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## [Trouble Opening the Load Data](https://discourse.slicer.org/t/trouble-opening-the-load-data/44330)

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**Author:** [@Megan\_Weaver](https://discourse.slicer.org/u/Megan_Weaver)\
**Replies:** 14\
**Last updated:** [January 28, 2026, 5:17pm UTC](https://discourse.slicer.org/t/trouble-opening-the-load-data/44330 "2026-01-28T17:17:42Z")

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Hi! I am having difficulty opening the load data every time I try to launch the data I get this error message. Any advice?

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## [Alpaca template selection K-means](https://discourse.slicer.org/t/alpaca-template-selection-k-means/45963)

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**Author:** [@Stephan\_Collins](https://discourse.slicer.org/u/Stephan_Collins)\
**Replies:** 1\
**Last updated:** [January 28, 2026, 3:52pm UTC](https://discourse.slicer.org/t/alpaca-template-selection-k-means/45963 "2026-01-28T15:52:21Z")

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Dear all, there’s something I did not understand in the ALPACA workflow. The plos one paper clearly explains the benefits of doing K means clustering and choosing templates that best match subgroups of data relative to …

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## [Landmark registration overlay not showing up](https://discourse.slicer.org/t/landmark-registration-overlay-not-showing-up/45965)

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**Author:** [@RHB](https://discourse.slicer.org/u/RHB)\
**Replies:** 2\
**Last updated:** [January 28, 2026, 3:25pm UTC](https://discourse.slicer.org/t/landmark-registration-overlay-not-showing-up/45965 "2026-01-28T15:25:02Z")

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Hi, I have 2 2D oct slices that I want to register mutually, these are not 3D volume, just retinal 2D slice and previously I tried to do Landmark registration using these, it worked. Now after that I am trying to do the…

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## [Slicer 5.10 qMRMLSubjectHierarchyComboBox turned to 'None' but no issue with 5.8.1](https://discourse.slicer.org/t/slicer-5-10-qmrmlsubjecthierarchycombobox-turned-to-none-but-no-issue-with-5-8-1/45203)

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**Author:** [@chz31](https://discourse.slicer.org/u/chz31)\
**Replies:** 8\
**Last updated:** [January 28, 2026, 3:00pm UTC](https://discourse.slicer.org/t/slicer-5-10-qmrmlsubjecthierarchycombobox-turned-to-none-but-no-issue-with-5-8-1/45203 "2026-01-28T15:00:19Z")

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Dear all, In a new Extension I recently made SlicerOrbitSurgerySim (installable in Extension Manager in Slicer 5.10), when I run a function called onInitialRegistrationPushButton from the plateRegistration module, the n…

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## [NNInteractive fails to export segmentations](https://discourse.slicer.org/t/nninteractive-fails-to-export-segmentations/45968)

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**Author:** [@doreenpa](https://discourse.slicer.org/u/doreenpa)\
**Replies:** 4\
**Last updated:** [January 28, 2026, 9:59am UTC](https://discourse.slicer.org/t/nninteractive-fails-to-export-segmentations/45968 "2026-01-28T09:59:19Z")

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I am working with NNInteractive module in 3D slicer on 3D NRRD files (I converted from DICOM via 3D slicer itself). The module worked smoothly and nicely generated volume segmentations, but once I tried to export them th…

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## [I created my own 3D slicer for a hackathon and won ](https://discourse.slicer.org/t/i-created-my-own-3d-slicer-for-a-hackathon-and-won/45966)

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**Author:** [@Thomas\_Kantecki](https://discourse.slicer.org/u/Thomas_Kantecki)\
**Replies:** 0\
**Last updated:** [January 28, 2026, 9:15am UTC](https://discourse.slicer.org/t/i-created-my-own-3d-slicer-for-a-hackathon-and-won/45966 "2026-01-28T09:15:10Z")

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Hello everyone. Never used this forum before but i thought maybe some of you would be interested in a project me and my team made in 36 hours. The idea was to make a google docs style collaborative MRI viewing software …

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## [Tools for planning segmentectomy of a lung](https://discourse.slicer.org/t/tools-for-planning-segmentectomy-of-a-lung/36629)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 4\
**Last updated:** [January 28, 2026, 6:02am UTC](https://discourse.slicer.org/t/tools-for-planning-segmentectomy-of-a-lung/36629 "2026-01-28T06:02:09Z")

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Open to hear your ideas @rbumm would you suggest any workflow or slicer extensions for this task? Segmentation wise, is it possible to separate lobe’s segments individualy with some tools that may or may not be integra…

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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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## [Project tumor model onto skull surface for craniotomy planning / Extension "Trackerless Craniotomy Planning based on 3D Slicer "](https://discourse.slicer.org/t/project-tumor-model-onto-skull-surface-for-craniotomy-planning-extension-trackerless-craniotomy-planning-based-on-3d-slicer/45950)

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**Author:** [@thymallus](https://discourse.slicer.org/u/thymallus)\
**Replies:** 0\
**Last updated:** [January 27, 2026, 5:54pm UTC](https://discourse.slicer.org/t/project-tumor-model-onto-skull-surface-for-craniotomy-planning-extension-trackerless-craniotomy-planning-based-on-3d-slicer/45950 "2026-01-27T17:54:55Z")

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Hi, does this extension still exist? i can’t find it … can anyone help me? :slight\_smile: https://www.researchgate.net/publication/323739599\_Trackerless\_surgical\_image-guided\_system\_design\_using\_an\_intera…

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## [Possible use of MedGemma for complex trach tube design](https://discourse.slicer.org/t/possible-use-of-medgemma-for-complex-trach-tube-design/45944)

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**Author:** [@LukaBloomRox](https://discourse.slicer.org/u/LukaBloomRox)\
**Replies:** 0\
**Last updated:** [January 27, 2026, 9:00am UTC](https://discourse.slicer.org/t/possible-use-of-medgemma-for-complex-trach-tube-design/45944 "2026-01-27T09:00:31Z")

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Hi, In earlier posts I have shared work in doing trach tube design from a set of ct scans of a patient with severe scoliosis and kyphosis in a variety of positions, trying to tell the difference between air and tissue, …

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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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## [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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## [Offline build support for packaging](https://discourse.slicer.org/t/offline-build-support-for-packaging/37616)

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**Author:** [@purepani](https://discourse.slicer.org/u/purepani)\
**Replies:** 2\
**Last updated:** [January 26, 2026, 11:55pm UTC](https://discourse.slicer.org/t/offline-build-support-for-packaging/37616 "2026-01-26T23:55:43Z")

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Hi, I was attempting to package this software for NixOS, and it looks like the cmake makes many network calls during the build, which, for reproducibility, isn’t allowed in NixOS. While it is possible to work around thi…

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## [Issue with surface area measurement in L3 skeletal muscle segmentation](https://discourse.slicer.org/t/issue-with-surface-area-measurement-in-l3-skeletal-muscle-segmentation/45916)

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**Author:** [@NutritionDepartment](https://discourse.slicer.org/u/NutritionDepartment)\
**Replies:** 2\
**Last updated:** [January 26, 2026, 6:31pm UTC](https://discourse.slicer.org/t/issue-with-surface-area-measurement-in-l3-skeletal-muscle-segmentation/45916 "2026-01-26T18:31:07Z")

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Dear 3D Slicer Development Team, I am using 3D Slicer to segment skeletal muscle on a single axial CT slice at the L3 level for body composition research. After segmentation, the Segment Statistics module reports a rea…

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## [Volume calculations are inconsistent on Bone CTs](https://discourse.slicer.org/t/volume-calculations-are-inconsistent-on-bone-cts/45919)

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**Author:** [@Nat](https://discourse.slicer.org/u/Nat)\
**Replies:** 1\
**Last updated:** [January 26, 2026, 6:21pm UTC](https://discourse.slicer.org/t/volume-calculations-are-inconsistent-on-bone-cts/45919 "2026-01-26T18:21:14Z")

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I am using slicer to separate cortical and trabecular bone in CT scans from morphosource. I use the threshold effect to first identify the cortical bone then use the wrap solidify tool to creat a segment with all bone vo…

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## [NO Meeting this week](https://discourse.slicer.org/t/no-meeting-this-week/45921)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [January 26, 2026, 10:36am UTC](https://discourse.slicer.org/t/no-meeting-this-week/45921 "2026-01-26T10:36:58Z")

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Hi all, There will be no developer meeting this week due to Project Week. See you all next week! Sam

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