# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=7

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

**Page:** 8

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## [Slicermorph- Segment Endocranium Taking Too Long](https://discourse.slicer.org/t/slicermorph-segment-endocranium-taking-too-long/47093)

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**Author:** [@PitaChib](https://discourse.slicer.org/u/PitaChib)\
**Replies:** 4\
**Last updated:** [May 21, 2026, 11:15pm UTC](https://discourse.slicer.org/t/slicermorph-segment-endocranium-taking-too-long/47093 "2026-05-21T23:15:02Z")

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Hi all, I’ve been doing rodent endocast with wrap solidify for a bit with success, but I’ve always been curious to try out segment endocranium feature automatically. Before I thought my computer was not good enough, but …

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## [SwissSkullStripper is having trouble with multiple splices, and so am I](https://discourse.slicer.org/t/swissskullstripper-is-having-trouble-with-multiple-splices-and-so-am-i/47111)

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**Author:** [@HomerHaddock](https://discourse.slicer.org/u/HomerHaddock)\
**Replies:** 0\
**Last updated:** [May 21, 2026, 8:30pm UTC](https://discourse.slicer.org/t/swissskullstripper-is-having-trouble-with-multiple-splices-and-so-am-i/47111 "2026-05-21T20:30:45Z")

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I am having trouble with getting a CT scan exported. The scan has one splice for X, Y, and Z where it gets the most quality. To show my problem I used the scan best used on the horizontal plane (It has the most imaging…

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## [Qt6 build: close scene and discard modifications is ignored](https://discourse.slicer.org/t/qt6-build-close-scene-and-discard-modifications-is-ignored/47108)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 0\
**Last updated:** [May 21, 2026, 5:10pm UTC](https://discourse.slicer.org/t/qt6-build-close-scene-and-discard-modifications-is-ignored/47108 "2026-05-21T17:10:34Z")

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I am experimenting with using Slicer built with Qt6 on Arch Linux on a daily basis. When a scene is closed, the SaveBeforeClosingScene appears. When the Close scene (discard modifications) button is clicked, the scene i…

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## [How to use the extension SlicerHeart](https://discourse.slicer.org/t/how-to-use-the-extension-slicerheart/45964)

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**Author:** [@hoangdinhau](https://discourse.slicer.org/u/hoangdinhau)\
**Replies:** 1\
**Last updated:** [May 20, 2026, 12:47pm UTC](https://discourse.slicer.org/t/how-to-use-the-extension-slicerheart/45964 "2026-05-20T12:47:47Z")

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Hello everyone, Who can help me how to use the extention SlicerHeart: we have MRI and 512 slices CT Thank you

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## [Improved python package installation: slicer.packaging](https://discourse.slicer.org/t/improved-python-package-installation-slicer-packaging/47088)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 0\
**Last updated:** [May 19, 2026, 3:58pm UTC](https://discourse.slicer.org/t/improved-python-package-installation-slicer-packaging/47088 "2026-05-19T15:58:35Z")

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An improved python package installation experience is now available out of the box for extension developers: slicer.packaging. This feature was merged about a month ago and is available in the preview version of Slicer. …

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## [Displace the axes idependently of the plane + navigate in time (4D-flow MRI dataset) + coding preset in python](https://discourse.slicer.org/t/displace-the-axes-idependently-of-the-plane-navigate-in-time-4d-flow-mri-dataset-coding-preset-in-python/47080)

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**Author:** [@jceb](https://discourse.slicer.org/u/jceb)\
**Replies:** 0\
**Last updated:** [May 19, 2026, 12:33pm UTC](https://discourse.slicer.org/t/displace-the-axes-idependently-of-the-plane-navigate-in-time-4d-flow-mri-dataset-coding-preset-in-python/47080 "2026-05-19T12:33:20Z")

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Dear 3D Slicer community First many thanks to developers and maintainers of this incredible software. I am working with 4D flow MRI datasets and have the following questions (if needed I can post separate questions) …

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## [Shift and wrap-around voxels transform](https://discourse.slicer.org/t/shift-and-wrap-around-voxels-transform/47022)

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**Author:** [@brizolara.lt](https://discourse.slicer.org/u/brizolara.lt)\
**Replies:** 4\
**Last updated:** [May 18, 2026, 9:55pm UTC](https://discourse.slicer.org/t/shift-and-wrap-around-voxels-transform/47022 "2026-05-18T21:55:33Z")

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Hi all, I would like to apply a shift in a definite direction (in my case, X) to the voxel values (not the coordinates) of a volume - keeping, thus, origin, spacing and dimensions intact. Also, I would like to wrap aro…

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## [Problems with extension manager](https://discourse.slicer.org/t/problems-with-extension-manager/47030)

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**Author:** [@jaimigray](https://discourse.slicer.org/u/jaimigray)\
**Replies:** 5\
**Last updated:** [May 18, 2026, 5:21pm UTC](https://discourse.slicer.org/t/problems-with-extension-manager/47030 "2026-05-18T17:21:36Z")

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Hi team! I’m having some problems with Slicer not loading the extensions manager correctly. This is happening with newer and older versions of slicer. When I launch Slicer, it opens a separate blank window called “vtkOut…

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## [Slicer.packaging library](https://discourse.slicer.org/t/slicer-packaging-library/47056)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 5\
**Last updated:** [May 18, 2026, 12:03pm UTC](https://discourse.slicer.org/t/slicer-packaging-library/47056 "2026-05-18T12:03:48Z")

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I came across this blog post on Linked in https://www.kitware.com/improving-python-dependency-handling-for-3d-slicer-extension-development/ The post says it is already integrated into the Slicer preview preview build. T…

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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)

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**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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## ["Pull from Repo" for Dev Mode](https://discourse.slicer.org/t/pull-from-repo-for-dev-mode/47064)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 0\
**Last updated:** [May 18, 2026, 6:07am UTC](https://discourse.slicer.org/t/pull-from-repo-for-dev-mode/47064 "2026-05-18T06:07:12Z")

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I added a feature request for a button that allows to get the latest version of module’s python code from the source repository. A "Pull from repo" for DevMode · Issue #9160 · Slicer/Slicer · GitHub The primary driver i…

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## [DTI Alps results are low, below 1](https://discourse.slicer.org/t/dti-alps-results-are-low-below-1/42698)

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**Author:** [@ecgt](https://discourse.slicer.org/u/ecgt)\
**Replies:** 7\
**Last updated:** [May 17, 2026, 9:09pm UTC](https://discourse.slicer.org/t/dti-alps-results-are-low-below-1/42698 "2026-05-17T21:09:44Z")

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I am having low values for the index I did 40 controls and i have = 0.855±0.045 I did the procedure explained in the web What am I doing wrong?

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## [Fill in part of segment without adding whole model ](https://discourse.slicer.org/t/fill-in-part-of-segment-without-adding-whole-model/47045)

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**Author:** [@akelly17](https://discourse.slicer.org/u/akelly17)\
**Replies:** 1\
**Last updated:** [May 15, 2026, 3:38pm UTC](https://discourse.slicer.org/t/fill-in-part-of-segment-without-adding-whole-model/47045 "2026-05-15T15:38:59Z")

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Hey all, I cannot seem to figure out how to get this section of my model to fill in (i.e: make the segment whole) without adding back the entire model. I have just figured out how the “masking” function works, and am sti…

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## [Possible issue with PSMA PET/CT DICOM loading and SUVbw recognition](https://discourse.slicer.org/t/possible-issue-with-psma-pet-ct-dicom-loading-and-suvbw-recognition/47020)

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**Author:** [@ranahashemi](https://discourse.slicer.org/u/ranahashemi)\
**Replies:** 2\
**Last updated:** [May 15, 2026, 12:24am UTC](https://discourse.slicer.org/t/possible-issue-with-psma-pet-ct-dicom-loading-and-suvbw-recognition/47020 "2026-05-15T00:24:51Z")

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Hello everyone, I encountered a possible issue when loading PSMA PET/CT DICOM files in 3D Slicer. When I select and load all DICOM files from DICOM database for one patient together, 3D Slicer does not seem to recogniz…

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## [difficulties finding some extensions](https://discourse.slicer.org/t/difficulties-finding-some-extensions/47035)

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**Author:** [@gloria.rossi](https://discourse.slicer.org/u/gloria.rossi)\
**Replies:** 1\
**Last updated:** [May 14, 2026, 9:45pm UTC](https://discourse.slicer.org/t/difficulties-finding-some-extensions/47035 "2026-05-14T21:45:15Z")

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Hi i cannot find some extension in the site @KitwareMedical/slicer-extensions-webapp I use stable version but I cannot find Totalsegmentator and PyTorch

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## [How to find the calcification?](https://discourse.slicer.org/t/how-to-find-the-calcification/47033)

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**Author:** [@liam26](https://discourse.slicer.org/u/liam26)\
**Replies:** 0\
**Last updated:** [May 14, 2026, 6:38pm UTC](https://discourse.slicer.org/t/how-to-find-the-calcification/47033 "2026-05-14T18:38:20Z")

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Hi, I’m looking for some help with finding arterial calcification. I’m working from MRIs, looking for illiac, portal, vena cava, etc. My current process looks something like: Subtract all vertebrae from the artery (In c…

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## [ImageStacks module won't load full tiff stack](https://discourse.slicer.org/t/imagestacks-module-wont-load-full-tiff-stack/47016)

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**Author:** [@Jknaub](https://discourse.slicer.org/u/Jknaub)\
**Replies:** 5\
**Last updated:** [May 14, 2026, 4:39pm UTC](https://discourse.slicer.org/t/imagestacks-module-wont-load-full-tiff-stack/47016 "2026-05-14T16:39:03Z")

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Operating system: Windows 11 Slicer version: 5.8.1 Expected behavior: importing a tiff stack with the slicermorph ImageStacks (3,867 images) Actual behavior: only selects a subset of the stack Hello, I’m trying to i…

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## [New extension: RadReirradiation for radiotherapy reirradiation analysis and EQD2 dose accumulation](https://discourse.slicer.org/t/new-extension-radreirradiation-for-radiotherapy-reirradiation-analysis-and-eqd2-dose-accumulation/47028)

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**Author:** [@LuisParedesOcampo](https://discourse.slicer.org/u/LuisParedesOcampo)\
**Replies:** 0\
**Last updated:** [May 14, 2026, 2:23pm UTC](https://discourse.slicer.org/t/new-extension-radreirradiation-for-radiotherapy-reirradiation-analysis-and-eqd2-dose-accumulation/47028 "2026-05-14T14:23:00Z")

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Hi everyone, I’d like to introduce RadReirradiation, a new 3D Slicer extension designed to support clinical reirradiation workflows in radiotherapy. The extension provides the following features: • Voxel-by-voxel BED …

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## [Error In total Segmentor macOS ](https://discourse.slicer.org/t/error-in-total-segmentor-macos/47021)

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**Author:** [@Gabriel.LA](https://discourse.slicer.org/u/Gabriel.LA)\
**Replies:** 1\
**Last updated:** [May 14, 2026, 6:41am UTC](https://discourse.slicer.org/t/error-in-total-segmentor-macos/47021 "2026-05-14T06:41:56Z")

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Command ‘\[’/Applications/Slicer.app/Contents/bin/../bin/PythonSlicer’, ‘/Applications/Slicer.app/Contents/lib/Python/bin/TotalSegmentator’, ‘-i’, ‘/private/var/folders/3n/nb74wlx17txbbdx1b3cjlwym0000gn/T/Slicer-gabriellu…

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## [How to display all the rotated oct images simultaneously in 3d view](https://discourse.slicer.org/t/how-to-display-all-the-rotated-oct-images-simultaneously-in-3d-view/47015)

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**Author:** [@tdchen](https://discourse.slicer.org/u/tdchen)\
**Replies:** 0\
**Last updated:** [May 14, 2026, 12:07am UTC](https://discourse.slicer.org/t/how-to-display-all-the-rotated-oct-images-simultaneously-in-3d-view/47015 "2026-05-14T00:07:50Z")

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What I can see now is: What I want to see is: Each of my pictures is a volume, and the content cannot be seen in 3d view. Could someone please help me? Thank you in advance!

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## [Apply composite affine + non-linear transform to 100k points](https://discourse.slicer.org/t/apply-composite-affine-non-linear-transform-to-100k-points/46993)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 5\
**Last updated:** [May 12, 2026, 6:39pm UTC](https://discourse.slicer.org/t/apply-composite-affine-non-linear-transform-to-100k-points/46993 "2026-05-12T18:39:08Z")

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Hi, I have a large ~10GB .h5 transform that I created within Slicer (affine+non-linear displacement field) by registering two volumes. I also have a spreadsheet that lists the XYZ coordinates of up to 100,000 points. …

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## [How can I calculate and visualize displacement vectors of the heart and lungs between Normal Breathing and DIBH](https://discourse.slicer.org/t/how-can-i-calculate-and-visualize-displacement-vectors-of-the-heart-and-lungs-between-normal-breathing-and-dibh/46995)

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**Author:** [@zahra\_Tabasi](https://discourse.slicer.org/u/zahra_Tabasi)\
**Replies:** 0\
**Last updated:** [May 12, 2026, 6:20pm UTC](https://discourse.slicer.org/t/how-can-i-calculate-and-visualize-displacement-vectors-of-the-heart-and-lungs-between-normal-breathing-and-dibh/46995 "2026-05-12T18:20:03Z")

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Hello everyone, I am currently conducting a research study involving patients with unilateral left-sided breast cancer undergoing radiotherapy. The purpose of my study is to compare Normal Breathing (free breathing) and…

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## [How can I Calculate and Visualize of Center of Mass (COM) or Centroid of the heart in 3D Slicer version 5.10.0](https://discourse.slicer.org/t/how-can-i-calculate-and-visualize-of-center-of-mass-com-or-centroid-of-the-heart-in-3d-slicer-version-5-10-0/46994)

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**Author:** [@zahra\_Tabasi](https://discourse.slicer.org/u/zahra_Tabasi)\
**Replies:** 0\
**Last updated:** [May 12, 2026, 6:14pm UTC](https://discourse.slicer.org/t/how-can-i-calculate-and-visualize-of-center-of-mass-com-or-centroid-of-the-heart-in-3d-slicer-version-5-10-0/46994 "2026-05-12T18:14:06Z")

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Hello everyone, I am currently conducting a research study involving patients with unilateral left-sided breast cancer undergoing radiotherapy. The purpose of my study is to compare Normal Breathing (free breathing) and…

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## [Help Non-linear Transform Error During Crop Volume / Total Segmentation](https://discourse.slicer.org/t/help-non-linear-transform-error-during-crop-volume-total-segmentation/46989)

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**Author:** [@jimenagonzalezsal](https://discourse.slicer.org/u/jimenagonzalezsal)\
**Replies:** 1\
**Last updated:** [May 11, 2026, 10:03pm UTC](https://discourse.slicer.org/t/help-non-linear-transform-error-during-crop-volume-total-segmentation/46989 "2026-05-11T22:03:02Z")

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Hi everyone!! I wanted to ask for some help. I’m trying to crop a volume and then add Total Segmentation, but whenever I try to either crop or create the segmentation from an MRI, a message appears stating: “Output volu…

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## [nnUNet fails with ModuleNotFoundError: No module named 'torchvision.ops'](https://discourse.slicer.org/t/nnunet-fails-with-modulenotfounderror-no-module-named-torchvision-ops/46802)

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**Author:** [@aabrown100-git](https://discourse.slicer.org/u/aabrown100-git)\
**Replies:** 5\
**Last updated:** [May 11, 2026, 9:03pm UTC](https://discourse.slicer.org/t/nnunet-fails-with-modulenotfounderror-no-module-named-torchvision-ops/46802 "2026-05-11T21:03:11Z")

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Using nnUNet extension with custom weights fails with the following error output. Start \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* nnUNet is already installed (2.7.0) and compatible…

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## [Min/max intensity normalization](https://discourse.slicer.org/t/min-max-intensity-normalization/29179)

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**Author:** [@mahmood](https://discourse.slicer.org/u/mahmood)\
**Replies:** 1\
**Last updated:** [May 11, 2026, 8:22pm UTC](https://discourse.slicer.org/t/min-max-intensity-normalization/29179 "2026-05-11T20:22:59Z")

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Sorry, I have a problem. Can we applied min/max intensity normalization with 3dslicer? If yes, How can it be done? Thanks

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## [How to normalize the intensity?](https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052)

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**Author:** [@Floren](https://discourse.slicer.org/u/Floren)\
**Replies:** 2\
**Last updated:** [May 11, 2026, 8:20pm UTC](https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052 "2026-05-11T20:20:36Z")

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Hello, everyone! I am working with prostate adc maps and trying to measure adc value for prostate tumors in order to demonstrate that there is a correlation between adc value and Gleason score. I understood that i must…

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## [Is it possible to rescale intensity of a volume?](https://discourse.slicer.org/t/is-it-possible-to-rescale-intensity-of-a-volume/2543)

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**Author:** [@Alex\_Vergara](https://discourse.slicer.org/u/Alex_Vergara)\
**Replies:** 5\
**Last updated:** [May 11, 2026, 7:52pm UTC](https://discourse.slicer.org/t/is-it-possible-to-rescale-intensity-of-a-volume/2543 "2026-05-11T19:52:13Z")

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I want to rescale a Volume created reading a wrongly calibrated dicom file. Is this possible? Usually this is automatically done with the RescaleIntercept and RescaleSlope from the dicom header but when those values are…

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## [3D Slicer won't open due to libssl on Ubuntu 24.04 LTS](https://discourse.slicer.org/t/3d-slicer-wont-open-due-to-libssl-on-ubuntu-24-04-lts/46987)

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**Author:** [@dvijay](https://discourse.slicer.org/u/dvijay)\
**Replies:** 4\
**Last updated:** [May 11, 2026, 4:35pm UTC](https://discourse.slicer.org/t/3d-slicer-wont-open-due-to-libssl-on-ubuntu-24-04-lts/46987 "2026-05-11T16:35:52Z")

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OS: Ubuntu 24.04.3 LTS Slicer: 5.10.0-linux-amd64 Installation method: cd ~/Downloads tar -xvf Slicer-5.10.0-linux-amd64.tar.gz sudo mv ./Slicer-5.10.0-linux-amd64 /opt/Slicer-5.10.0-linux-amd64 sudo apt-get install l…

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## [Model To Model Distance running as CLI](https://discourse.slicer.org/t/model-to-model-distance-running-as-cli/46971)

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**Author:** [@Mrdlev](https://discourse.slicer.org/u/Mrdlev)\
**Replies:** 1\
**Last updated:** [May 11, 2026, 1:27pm UTC](https://discourse.slicer.org/t/model-to-model-distance-running-as-cli/46971 "2026-05-11T13:27:52Z")

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Hi everyone, I’m trying to use the Model-to-Model Distance extension in 3D Slicer to quantify the average displacement between two structures (one with deformation and one without). However, I’ve run into an issue: I…

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