# Top

**URL:** https://discourse.slicer.org/top.md?page=3

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

**Page:** 4

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## [Accidentally moving all markups in a pointList](https://discourse.slicer.org/t/accidentally-moving-all-markups-in-a-pointlist/47685)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 8\
**Last updated:** [July 20, 2026, 3:05pm UTC](https://discourse.slicer.org/t/accidentally-moving-all-markups-in-a-pointlist/47685 "2026-07-20T15:05:57Z")

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This was happening before but I though it was fixed. I can replicate this on MacOS 5.12.1 middle click and drag, moves the entire pointList. interaction is not enabled, so I would consider this a bug.

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## [Only points showing in Mean Shape Visualization - Slicermorph](https://discourse.slicer.org/t/only-points-showing-in-mean-shape-visualization-slicermorph/45121)

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**Author:** [@emmm\_m](https://discourse.slicer.org/u/emmm_m)\
**Replies:** 8\
**Last updated:** [November 21, 2025, 3:26am UTC](https://discourse.slicer.org/t/only-points-showing-in-mean-shape-visualization-slicermorph/45121 "2025-11-21T03:26:33Z")

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I’m new to slicer so I apologize if this is a question driven by my ineptness. I am working on generating GPA/PCA visualizations, however when I try to generate a Mean shape visualization for the proximal and distal end …

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## [Spatial information in 2D segmentations](https://discourse.slicer.org/t/spatial-information-in-2d-segmentations/46642)

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**Author:** [@Antmaker](https://discourse.slicer.org/u/Antmaker)\
**Replies:** 5\
**Last updated:** [April 3, 2026, 9:55pm UTC](https://discourse.slicer.org/t/spatial-information-in-2d-segmentations/46642 "2026-04-03T21:55:40Z")

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According to this post, 2D segmentation is possible in 3D Slicer. I am trying to figure out whether it is possible to incorporate spatial information such that I may calculate “area” instead of “volume (Volume Statistics…

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## [Volume Rendering TDR ERROR CODE 7 issue persists](https://discourse.slicer.org/t/volume-rendering-tdr-error-code-7-issue-persists/48373)

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**Author:** [@ThomasVanParys](https://discourse.slicer.org/u/ThomasVanParys)\
**Replies:** 7\
**Last updated:** [October 7, 2026, 6:42pm UTC](https://discourse.slicer.org/t/volume-rendering-tdr-error-code-7-issue-persists/48373 "2026-10-07T18:42:20Z")

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Hello, I have a large mCT volume which I have halved and converted to an .nrrd volume (1.32 GB) which is succesfully imported into 3DSlicer. However, when I attempt to use the volume rendering window and shift the contr…

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## [Slicer 5.11.0 crashes immediately when switching to nnInteractive module](https://discourse.slicer.org/t/slicer-5-11-0-crashes-immediately-when-switching-to-nninteractive-module/47098)

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**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 6\
**Last updated:** [June 1, 2026, 6:59am UTC](https://discourse.slicer.org/t/slicer-5-11-0-crashes-immediately-when-switching-to-nninteractive-module/47098 "2026-06-01T06:59:15Z")

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Using Slicer 5.11.0 on 2026 Macbook pro, M5 Pro chip. After installing the nnInteractive extension and restarting Slicer, when I switch to the nnInteractive module, it tries to install some dependencies. Almost immediat…

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## [New opportunity](https://discourse.slicer.org/t/new-opportunity/46313)

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**Author:** [@Martin\_Parraga](https://discourse.slicer.org/u/Martin_Parraga)\
**Replies:** 1\
**Last updated:** [August 23, 2026, 1:07pm UTC](https://discourse.slicer.org/t/new-opportunity/46313 "2026-08-23T13:07:08Z")

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Hello everyone! My name is Martin, and I work at micro1. We’re currently looking for talented professionals for 3D Slicer Experts You can find all the details and apply through here. We’re a U.S.-based startup working …

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## [Segment tooth enamel and pulp from TotalSegmentator tooth-by-tooth](https://discourse.slicer.org/t/segment-tooth-enamel-and-pulp-from-totalsegmentator-tooth-by-tooth/47637)

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**Author:** [@r\_vorup](https://discourse.slicer.org/u/r_vorup)\
**Replies:** 4\
**Last updated:** [July 19, 2026, 6:11pm UTC](https://discourse.slicer.org/t/segment-tooth-enamel-and-pulp-from-totalsegmentator-tooth-by-tooth/47637 "2026-07-19T18:11:58Z")

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Hello all, I have used the TotalSegmentator to segment a CBCT scan of upper and lower jaw, and have gotten each tooth in an individual segment. I now want to split each tooth into dentine and enamel, for them to be 3D p…

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## [Advice on cleaning up incredibly noisy segmentations](https://discourse.slicer.org/t/advice-on-cleaning-up-incredibly-noisy-segmentations/47837)

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**Author:** [@Chelonian](https://discourse.slicer.org/u/Chelonian)\
**Replies:** 6\
**Last updated:** [August 16, 2026, 6:37pm UTC](https://discourse.slicer.org/t/advice-on-cleaning-up-incredibly-noisy-segmentations/47837 "2026-08-16T18:37:54Z")

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I’m trying to segment the internals of some incredibly noisy CT scans. example of what I’m working with I’ve managed to segment the intestines but I’m not happy at all with the quality of the segments or the amount of…

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

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

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

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## [How to update widget from logic?](https://discourse.slicer.org/t/how-to-update-widget-from-logic/45671)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 4\
**Last updated:** [January 7, 2026, 3:47am UTC](https://discourse.slicer.org/t/how-to-update-widget-from-logic/45671 "2026-01-07T03:47:09Z")

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I have a C++ extension module. I am doing boolean mesh operation calculation in a worker thread inside the logic module. I have a function that calculates the volume of a given segmentation node. I need it run as soon as…

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## [Train AI for landmark detection](https://discourse.slicer.org/t/train-ai-for-landmark-detection/46734)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 6\
**Last updated:** [April 17, 2026, 6:16pm UTC](https://discourse.slicer.org/t/train-ai-for-landmark-detection/46734 "2026-04-17T18:16:18Z")

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Hi, I’d like to ask here which are community suggestions about selecting an AI model and setting up training data for a medical landmark detection task. In my use case, I need to detect the superior tip of healthy kidn…

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## [slicerTrame module working example](https://discourse.slicer.org/t/slicertrame-module-working-example/45236)

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**Author:** [@bserrano](https://discourse.slicer.org/u/bserrano)\
**Replies:** 5\
**Last updated:** [November 28, 2025, 12:18pm UTC](https://discourse.slicer.org/t/slicertrame-module-working-example/45236 "2025-11-28T12:18:23Z")

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Hi all (particularly @finetjul, since you’ve been active on this topic), I’ve been working with 3D Slicer for a few years now. I recently discovered Trame Slicer, and I think it’s a great tool for bringing Slicer to the…

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## [Which is the best extension for Brain parcellation?](https://discourse.slicer.org/t/which-is-the-best-extension-for-brain-parcellation/45483)

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**Author:** [@Suhaim](https://discourse.slicer.org/u/Suhaim)\
**Replies:** 3\
**Last updated:** [June 11, 2026, 9:28pm UTC](https://discourse.slicer.org/t/which-is-the-best-extension-for-brain-parcellation/45483 "2026-06-11T21:28:16Z")

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Hi, Is there any extension in 3D-Slicer which offers automated brain segmentation for parts such as - Amygdala, Hippocampus, Insula etc.? Which extension has the best accuracy? I was able to find SlicerNeuroSegmentatio…

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## [How to turn a python extension into a C++ one?](https://discourse.slicer.org/t/how-to-turn-a-python-extension-into-a-c-one/47476)

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**Author:** [@Long\_Zhang](https://discourse.slicer.org/u/Long_Zhang)\
**Replies:** 1\
**Last updated:** [July 1, 2026, 2:17pm UTC](https://discourse.slicer.org/t/how-to-turn-a-python-extension-into-a-c-one/47476 "2026-07-01T14:17:01Z")

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I want to speedup the extension, and I wonder if this is a feasible way. and how to do it.

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## [How can I call 3D Slicer fully externally and automate a workflow? ](https://discourse.slicer.org/t/how-can-i-call-3d-slicer-fully-externally-and-automate-a-workflow/46042)

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**Author:** [@JoshMono](https://discourse.slicer.org/u/JoshMono)\
**Replies:** 6\
**Last updated:** [February 18, 2026, 4:33pm UTC](https://discourse.slicer.org/t/how-can-i-call-3d-slicer-fully-externally-and-automate-a-workflow/46042 "2026-02-18T16:33:43Z")

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Hey there folks. I’m working on a software assignment where my goal is to help automate a couple of tasks for my employer. My employer uses 3D Slicer, Meshlab and eventually Blender to make a 3D model from Dicom files a…

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## [High RMS error during pivot calibration with Vicon/Qualisys](https://discourse.slicer.org/t/high-rms-error-during-pivot-calibration-with-vicon-qualisys/45443)

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**Author:** [@AurelieS](https://discourse.slicer.org/u/AurelieS)\
**Replies:** 6\
**Last updated:** [December 16, 2025, 12:01pm UTC](https://discourse.slicer.org/t/high-rms-error-during-pivot-calibration-with-vicon-qualisys/45443 "2025-12-16T12:01:10Z")

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Dear Slicer team, We succeeded in integrating live Qualisys and VICON data into Slicer using IGT (I will go back to you for this code and integration). However during the pivot calibration of the stylus using the Quali…

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## [Build Error: \_ffi\_type\_longdouble symbol not found for arm64 during Python build](https://discourse.slicer.org/t/build-error-ffi-type-longdouble-symbol-not-found-for-arm64-during-python-build/45650)

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**Author:** [@salim](https://discourse.slicer.org/u/salim)\
**Replies:** 8\
**Last updated:** [January 12, 2026, 3:17pm UTC](https://discourse.slicer.org/t/build-error-ffi-type-longdouble-symbol-not-found-for-arm64-during-python-build/45650 "2026-01-12T15:17:36Z")

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Hello Slicer Community, I am encountering a linker error while building 3D Slicer from source on Apple Silicon. The build fails at approximately 51% during the \_freeze\_importlib step of the Python internal build. 51%\]…

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## [GPA interactive 3D visualization model deformed](https://discourse.slicer.org/t/gpa-interactive-3d-visualization-model-deformed/48280)

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**Author:** [@PitaChib](https://discourse.slicer.org/u/PitaChib)\
**Replies:** 7\
**Last updated:** [September 25, 2026, 5:12am UTC](https://discourse.slicer.org/t/gpa-interactive-3d-visualization-model-deformed/48280 "2026-09-25T05:12:03Z")

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Thanks ahead of time, been scratching my head about this for a day so I think it’s time to ask… I’m trying to generate animation of PC warping on my closest to mean shape model (a rodent brain), and when I loaded the re…

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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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## [Volume rendering adjusting precisely](https://discourse.slicer.org/t/volume-rendering-adjusting-precisely/45182)

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**Author:** [@michaelli](https://discourse.slicer.org/u/michaelli)\
**Replies:** 4\
**Last updated:** [November 24, 2025, 2:48pm UTC](https://discourse.slicer.org/t/volume-rendering-adjusting-precisely/45182 "2025-11-24T14:48:01Z")

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In volume rendering, after selecting a preset, I can drag the slider to adjust the ‘shift’ value. But I want to know how to adjust the ‘shift’ precisely?

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## [How to detect MRI file being loaded?](https://discourse.slicer.org/t/how-to-detect-mri-file-being-loaded/45079)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 8\
**Last updated:** [November 21, 2025, 9:40am UTC](https://discourse.slicer.org/t/how-to-detect-mri-file-being-loaded/45079 "2025-11-21T09:40:31Z")

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Hello, I need to log the header of the MRI file. How can I detect if an MRI file is loaded in slicer? Thanks for your help.

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## [How to save volume property JSON as a preset](https://discourse.slicer.org/t/how-to-save-volume-property-json-as-a-preset/48139)

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**Author:** [@derradji](https://discourse.slicer.org/u/derradji)\
**Replies:** 5\
**Last updated:** [September 30, 2026, 10:09am UTC](https://discourse.slicer.org/t/how-to-save-volume-property-json-as-a-preset/48139 "2026-09-30T10:09:49Z")

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hi i have volume property saved vp.JSON , and i want to set it as a preset and select it for every volume a want to render . is there a feature that can add or save any modified preset as a new one

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## [Animator module not exporting in any format](https://discourse.slicer.org/t/animator-module-not-exporting-in-any-format/47153)

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**Author:** [@Atticus](https://discourse.slicer.org/u/Atticus)\
**Replies:** 6\
**Last updated:** [May 28, 2026, 4:41pm UTC](https://discourse.slicer.org/t/animator-module-not-exporting-in-any-format/47153 "2026-05-28T16:41:54Z")

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I have used the Animator module in the past to produce short animations of volumes rotating, being cropped to ROIs or changing their colors. I have not been able to export animations today, in any format or resolution, …

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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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## [MacOS and Linux extensions for stable is delayed?](https://discourse.slicer.org/t/macos-and-linux-extensions-for-stable-is-delayed/45043)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 7\
**Last updated:** [November 17, 2025, 10:36pm UTC](https://discourse.slicer.org/t/macos-and-linux-extensions-for-stable-is-delayed/45043 "2025-11-17T22:36:24Z")

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Hi folks, Current extension catalog for stable for MacOS and Linux is not updated with build from today. Windows is up to date. Cdash does not show any MacOS builds. Are they still being build?

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## [Slicer crashes on startup due to SlicerVMTK extension](https://discourse.slicer.org/t/slicer-crashes-on-startup-due-to-slicervmtk-extension/47660)

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**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 6\
**Last updated:** [July 18, 2026, 3:35pm UTC](https://discourse.slicer.org/t/slicer-crashes-on-startup-due-to-slicervmtk-extension/47660 "2026-07-18T15:35:22Z")

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Issue: On Slicer 5.12.2, Slicer crashes on startup after restarting Slicer following installation of SlicerVMTK. The startup log shows module loading failures in SlicerVMTK due to unresolved dylib dependencies, including…

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## [Aligning CBCT & intraoral scan](https://discourse.slicer.org/t/aligning-cbct-intraoral-scan/45801)

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**Author:** [@Aiden](https://discourse.slicer.org/u/Aiden)\
**Replies:** 3\
**Last updated:** [July 29, 2026, 6:53am UTC](https://discourse.slicer.org/t/aligning-cbct-intraoral-scan/45801 "2026-07-29T06:53:11Z")

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I have a STL from an intraoral scan with 3shape, and a CBCT in dicom. How can I align these semi automatically using a few manual landmarks? What I have: 1x Skull CBCT dicom (edit: I also have a segmentation of this fr…

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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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## [Build Slicer on Nvidia's Jetson Orin Nano](https://discourse.slicer.org/t/build-slicer-on-nvidias-jetson-orin-nano/47737)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 5\
**Last updated:** [July 28, 2026, 1:36am UTC](https://discourse.slicer.org/t/build-slicer-on-nvidias-jetson-orin-nano/47737 "2026-07-28T01:36:52Z")

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Hi, I have this developer kit and I was able to compile Slicer. My steps where almost the same as provided on Project Description | NA-MIC Project Weeks and Scripts for building Slicer on Ubuntu ARM aarch64 · GitHub 1…

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## [DECA mean shape model: partly coarse surface](https://discourse.slicer.org/t/deca-mean-shape-model-partly-coarse-surface/46332)

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**Author:** [@MrMarkus](https://discourse.slicer.org/u/MrMarkus)\
**Replies:** 8\
**Last updated:** [March 16, 2026, 4:02pm UTC](https://discourse.slicer.org/t/deca-mean-shape-model-partly-coarse-surface/46332 "2026-03-16T16:02:33Z")

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Hi, I am using DECA for some shape analysis. I am wondering why the resulting reference / atlas shape model appears to have partly coarse surface. The workflow for comparing 2 groups looks like this: first: using …

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## [No linux preview build since 4/22](https://discourse.slicer.org/t/no-linux-preview-build-since-4-22/46889)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 2\
**Last updated:** [May 4, 2026, 7:30pm UTC](https://discourse.slicer.org/t/no-linux-preview-build-since-4-22/46889 "2026-05-04T19:30:42Z")

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I just downloaded the latest preview for Linux and it is dated 4/22. @Sam\_Horvath @ebrahim

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## [Export Models as One STL after transformation](https://discourse.slicer.org/t/export-models-as-one-stl-after-transformation/47371)

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**Author:** [@jawdoc](https://discourse.slicer.org/u/jawdoc)\
**Replies:** 5\
**Last updated:** [June 18, 2026, 12:43pm UTC](https://discourse.slicer.org/t/export-models-as-one-stl-after-transformation/47371 "2026-06-18T12:43:43Z")

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Greetings. I am a facial surgeon and fairly familiar with 3D Slicer. I have a quick question. So my goal is to take a mandible fracture, segment the fracture, and move the segments to their anatomic positions, which allo…

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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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## [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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## [Dicom3tools for DICOM validation available via pip and web app](https://discourse.slicer.org/t/dicom3tools-for-dicom-validation-available-via-pip-and-web-app/48212)

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**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 3\
**Last updated:** [September 21, 2026, 4:00pm UTC](https://discourse.slicer.org/t/dicom3tools-for-dicom-validation-available-via-pip-and-web-app/48212 "2026-09-21T16:00:24Z")

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Reposted (with edits) from Dicom3tools binaries are now available via a PyPI package - Announcements - Imaging Data Commons Those of us who work with DICOM a lot (by desire or by necessity) know what dciodvfy is. The u…

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## [3D Slicer for simulating MRI planning](https://discourse.slicer.org/t/3d-slicer-for-simulating-mri-planning/45259)

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**Author:** [@Dave](https://discourse.slicer.org/u/Dave)\
**Replies:** 1\
**Last updated:** [November 28, 2025, 1:29pm UTC](https://discourse.slicer.org/t/3d-slicer-for-simulating-mri-planning/45259 "2025-11-28T13:29:20Z")

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Hello everyone: I’m a mri teacher for technologists who would like to use this software for my lessons. I find it very useful to visualize DICOM data and navigating through organs and different planes. Could it be poss…

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## [Models with topographic information](https://discourse.slicer.org/t/models-with-topographic-information/46387)

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**Author:** [@JaredAmudeo](https://discourse.slicer.org/u/JaredAmudeo)\
**Replies:** 7\
**Last updated:** [March 7, 2026, 5:14pm UTC](https://discourse.slicer.org/t/models-with-topographic-information/46387 "2026-03-07T17:14:20Z")

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Greetings everyone, By any chance, does anyone know how to create this type of model or how to add a topographic scale like the one shown in the attached image? For publications, what I usually do is segment the element…

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## [3D views synchronized using python](https://discourse.slicer.org/t/3d-views-synchronized-using-python/45423)

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**Author:** [@PimBeentjes](https://discourse.slicer.org/u/PimBeentjes)\
**Replies:** 5\
**Last updated:** [December 15, 2025, 1:46pm UTC](https://discourse.slicer.org/t/3d-views-synchronized-using-python/45423 "2025-12-15T13:46:01Z")

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I am doing an VR/AR project in 3Dslicer, we open multiple 3D views, for example the black views shown in the image. We also have the blue 3D. We can now synchronize them in slicer by pressing the two interlooped circles,…

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## [Need to turn of raycast for all segmentation node's except one in 3D view](https://discourse.slicer.org/t/need-to-turn-of-raycast-for-all-segmentation-nodes-except-one-in-3d-view/46464)

<div class="topic-metadata">

**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 6\
**Last updated:** [March 18, 2026, 9:24am UTC](https://discourse.slicer.org/t/need-to-turn-of-raycast-for-all-segmentation-nodes-except-one-in-3d-view/46464 "2026-03-18T09:24:53Z")

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Hello, I have a target tissue segmented using the Segment editor. And I have more than 150 ellipsoidal segmentation nodes in the scene and visible in the 3D views. And I have to draw a line on the views. When I draw the…

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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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## [2026.08.04 Weekly Meeting](https://discourse.slicer.org/t/2026-08-04-weekly-meeting/47761)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 6\
**Last updated:** [August 4, 2026, 3:46pm UTC](https://discourse.slicer.org/t/2026-08-04-weekly-meeting/47761 "2026-08-04T15:46:19Z")

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Title: 2026.08.04 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 · August 4, 2026…

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## [How to cut a Model using a Grid Surface markup?](https://discourse.slicer.org/t/how-to-cut-a-model-using-a-grid-surface-markup/45416)

<div class="topic-metadata">

**Author:** [@GroadoSwaggins](https://discourse.slicer.org/u/GroadoSwaggins)\
**Replies:** 5\
**Last updated:** [December 12, 2025, 1:01am UTC](https://discourse.slicer.org/t/how-to-cut-a-model-using-a-grid-surface-markup/45416 "2025-12-12T01:01:48Z")

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tldr: I would like to cut a Model in “half” using a non-flat planar surface I created with Markup \> Geometric Surface Grid. Is it possible? Further explanation below. I have a CT scan asymmetrical brain Volume that I ha…

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## [Medical Image Segmentation (CT) of Frog Organs using 3D Slicer](https://discourse.slicer.org/t/medical-image-segmentation-ct-of-frog-organs-using-3d-slicer/45615)

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**Author:** [@Fyn\_nari](https://discourse.slicer.org/u/Fyn_nari)\
**Replies:** 6\
**Last updated:** [February 5, 2026, 11:46am UTC](https://discourse.slicer.org/t/medical-image-segmentation-ct-of-frog-organs-using-3d-slicer/45615 "2026-02-05T11:46:29Z")

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I am working on a research project focused on environmental radioprotection. The goal is to develop voxelized phantoms of terrestrial species to study the radiological effects of pollutants. I have a CT-scan series of a …

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## [IDAVLM Converter Not Aligning Landmarks to Model](https://discourse.slicer.org/t/idavlm-converter-not-aligning-landmarks-to-model/46940)

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**Author:** [@ThomasVanParys](https://discourse.slicer.org/u/ThomasVanParys)\
**Replies:** 5\
**Last updated:** [May 7, 2026, 2:31pm UTC](https://discourse.slicer.org/t/idavlm-converter-not-aligning-landmarks-to-model/46940 "2026-05-07T14:31:45Z")

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Hello All, I have create a patch in Landmark IDAV, converting the .PTS in SlicerMorph IDAVLM converter. However, they do not align with the corresponding mesh used in Landmark as seen in the UI: I am clearly missing…

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## [Linear transform not appearing anymore as a driver in IGT Volume Reslicer Driver](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497)

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**Author:** [@spichardo](https://discourse.slicer.org/u/spichardo)\
**Replies:** 1\
**Last updated:** [December 16, 2025, 5:35am UTC](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497 "2025-12-16T05:35:57Z")

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Hi, I got this new issue in r5.10.0 of 3DSlicer and SlicerIGT (Revision: 71e2153). I create a new linear transformation to be used in the IGT Volume Reslicer Driver, but the linear transform does not appear in the list…

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## [Segmenting individual lobes in an abnormal brain (with hydrocephalus)](https://discourse.slicer.org/t/segmenting-individual-lobes-in-an-abnormal-brain-with-hydrocephalus/47275)

<div class="topic-metadata">

**Author:** [@Preetham\_Dange](https://discourse.slicer.org/u/Preetham_Dange)\
**Replies:** 6\
**Last updated:** [June 8, 2026, 8:35pm UTC](https://discourse.slicer.org/t/segmenting-individual-lobes-in-an-abnormal-brain-with-hydrocephalus/47275 "2026-06-08T20:35:50Z")

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Hello everyone, I am currently working on hydrocephalus . I need do segment the lobes of the brain in MRI of children with hydrocephalus . I saw a few extensions on 3D slicer and some sites like VolBrain but they are on…

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## [Can 3D Slicer run in external SSD?](https://discourse.slicer.org/t/can-3d-slicer-run-in-external-ssd/46939)

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**Author:** [@Akhmad\_Fauzan](https://discourse.slicer.org/u/Akhmad_Fauzan)\
**Replies:** 1\
**Last updated:** [May 6, 2026, 2:43pm UTC](https://discourse.slicer.org/t/can-3d-slicer-run-in-external-ssd/46939 "2026-05-06T14:43:42Z")

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I was wondering if it is possible to run 3D Slicer directly from an external SSD? I would appreciate the insights on this. Thank you.

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## [Clinical DICOM loading error, PixelData larger than remaining bytes in file, but images look OK](https://discourse.slicer.org/t/clinical-dicom-loading-error-pixeldata-larger-than-remaining-bytes-in-file-but-images-look-ok/46077)

<div class="topic-metadata">

**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 3\
**Last updated:** [February 8, 2026, 10:44pm UTC](https://discourse.slicer.org/t/clinical-dicom-loading-error-pixeldata-larger-than-remaining-bytes-in-file-but-images-look-ok/46077 "2026-02-08T22:44:20Z")

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When I download an image series directly from our clinical PACS and import it into Slicer, I get the following error message repeated for each .dcm file: “E: DcmElement: PixelData (7fe0,0010) larger (4294967295) than re…

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## [Segment Editor Paint tool stops working after the first stroke](https://discourse.slicer.org/t/segment-editor-paint-tool-stops-working-after-the-first-stroke/47036)

<div class="topic-metadata">

**Author:** [@Riccardo\_Serenella](https://discourse.slicer.org/u/Riccardo_Serenella)\
**Replies:** 7\
**Last updated:** [May 18, 2026, 8:42am UTC](https://discourse.slicer.org/t/segment-editor-paint-tool-stops-working-after-the-first-stroke/47036 "2026-05-18T08:42:44Z")

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Hi everyone, I am experiencing a strange issue with the Segment Editor in 3D Slicer. When I create a new segmentation and use the Paint effect, the first paint stroke works correctly. However, immediately after that fi…

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## [Bug in ImportLabelmapToSegmentationNode if multiple parent transforms](https://discourse.slicer.org/t/bug-in-importlabelmaptosegmentationnode-if-multiple-parent-transforms/46524)

<div class="topic-metadata">

**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 6\
**Last updated:** [March 26, 2026, 10:30pm UTC](https://discourse.slicer.org/t/bug-in-importlabelmaptosegmentationnode-if-multiple-parent-transforms/46524 "2026-03-26T22:30:19Z")

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A labelmap imported to a segmentation using ImportLabelmapToSegmentationNode is transformed incorrectly if there are multiple parent transforms soft-applied. I have been using ImportLabelmapToSegmentationNode successfull…

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