# Latest

**URL:** https://discourse.slicer.org/latest.md?page=2

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

**Page:** 3

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## [New modules for generation CFD-simulation-ready meshes](https://discourse.slicer.org/t/new-modules-for-generation-cfd-simulation-ready-meshes/48250)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 1\
**Last updated:** [September 24, 2026, 2:03pm UTC](https://discourse.slicer.org/t/new-modules-for-generation-cfd-simulation-ready-meshes/48250 "2026-09-24T14:03:18Z")

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I’m happy to share that we have completed development of a set of modules to generate CFD-simulation-ready mesh from image segmentation. The work has been largely based on the VMTK toolkit, exposing its existing feature…

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## [Best way to create same domain size for segmentation masks and 3D .nrrd files?](https://discourse.slicer.org/t/best-way-to-create-same-domain-size-for-segmentation-masks-and-3d-nrrd-files/39608)

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**Author:** [@Yue-Hin\_Loke1](https://discourse.slicer.org/u/Yue-Hin_Loke1)\
**Replies:** 2\
**Last updated:** [September 24, 2026, 6:55am UTC](https://discourse.slicer.org/t/best-way-to-create-same-domain-size-for-segmentation-masks-and-3d-nrrd-files/39608 "2026-09-24T06:55:11Z")

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Hi all, I have a series of 3D .nrrd files of MRI images and corresponding segmentation masks that I created from slicer that I am hoping to train for autosegmentation. I am trying to prepare the data by make them share…

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## [Exporting a ".seg.nrrd" Segmentation with Extent of Original Image](https://discourse.slicer.org/t/exporting-a-seg-nrrd-segmentation-with-extent-of-original-image/36996)

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**Author:** [@sjanko2](https://discourse.slicer.org/u/sjanko2)\
**Replies:** 1\
**Last updated:** [September 24, 2026, 6:51am UTC](https://discourse.slicer.org/t/exporting-a-seg-nrrd-segmentation-with-extent-of-original-image/36996 "2026-09-24T06:51:42Z")

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Hello, I am new to posting to this forum, so please let me know if this question is in the right place! I have a labelmapvolume node (“atlas”) and a volume node (“ghost”) within my scene. I’d like to export the labels …

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## [Virtual Excavation of Iron Age Cremations: Using 3D Slicer for CT Analysis of Block-Lifted Graves.](https://discourse.slicer.org/t/virtual-excavation-of-iron-age-cremations-using-3d-slicer-for-ct-analysis-of-block-lifted-graves/48248)

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**Author:** [@Danille\_Melet](https://discourse.slicer.org/u/Danille_Melet)\
**Replies:** 1\
**Last updated:** [September 23, 2026, 7:39pm UTC](https://discourse.slicer.org/t/virtual-excavation-of-iron-age-cremations-using-3d-slicer-for-ct-analysis-of-block-lifted-graves/48248 "2026-09-23T19:39:42Z")

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Hi everyone, I wanted to share a novel, non-clinical archaeological application of 3D Slicer (v5.8.1) from my Bachelor’s thesis in Archaeology. A big thank you to the 3D Slicer developer community for providing such an …

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## [Shift-mouse not placing on surface of segment](https://discourse.slicer.org/t/shift-mouse-not-placing-on-surface-of-segment/48240)

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**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 7\
**Last updated:** [September 23, 2026, 4:56pm UTC](https://discourse.slicer.org/t/shift-mouse-not-placing-on-surface-of-segment/48240 "2026-09-23T16:56:54Z")

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This is on main, built yesterday on MacBook Pro M5. When I hold down shift in the 3D view to place a crosshair, the crosshair is placed slightly above the segment (see attached image). This does not happen on my Windows …

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## [extensions have been installed but are not showing up under 'Welcome to Slicer' dropdown](https://discourse.slicer.org/t/extensions-have-been-installed-but-are-not-showing-up-under-welcome-to-slicer-dropdown/48244)

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**Author:** [@julian.macdonald](https://discourse.slicer.org/u/julian.macdonald)\
**Replies:** 2\
**Last updated:** [September 23, 2026, 3:34pm UTC](https://discourse.slicer.org/t/extensions-have-been-installed-but-are-not-showing-up-under-welcome-to-slicer-dropdown/48244 "2026-09-23T15:34:04Z")

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Hi. Hoping someone can help. I’ve installed 3DSlicer onto work laptop and have added various extensions (OpenDose3D, SlicerElastix and SlicerRT as examples) manually. They show up in ‘Manage Extensions’ (although they …

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## [Glitch Black screen with white arrow intermittently why?](https://discourse.slicer.org/t/glitch-black-screen-with-white-arrow-intermittently-why/48247)

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**Author:** [@MaxFacRad](https://discourse.slicer.org/u/MaxFacRad)\
**Replies:** 1\
**Last updated:** [September 23, 2026, 2:48pm UTC](https://discourse.slicer.org/t/glitch-black-screen-with-white-arrow-intermittently-why/48247 "2026-09-23T14:48:49Z")

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I keep getting a black screen with a white arrow and it comes and goes constantly and sometimes the screen freezes with it on why is 3D Slicer doing this?

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## [Aruco navigation, camera Intel realsense d415](https://discourse.slicer.org/t/aruco-navigation-camera-intel-realsense-d415/48245)

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**Author:** [@D.i\_V](https://discourse.slicer.org/u/D.i_V)\
**Replies:** 0\
**Last updated:** [September 23, 2026, 2:47pm UTC](https://discourse.slicer.org/t/aruco-navigation-camera-intel-realsense-d415/48245 "2026-09-23T14:47:48Z")

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Hello! I am developing a navigation system model using ArUco markers. Configuration file - Optical marker tracker using MMF video from plus toolkit 2.8. I calibrated the camera using a chessboard pattern. The video in 3D…

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## [TotalSynth: whole-body synthetic CT from MRI and CBCT in 3D Slicer (IMPACT-Synth and KonfAI updated)](https://discourse.slicer.org/t/totalsynth-whole-body-synthetic-ct-from-mri-and-cbct-in-3d-slicer-impact-synth-and-konfai-updated/48242)

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**Author:** [@vboussot](https://discourse.slicer.org/u/vboussot)\
**Replies:** 0\
**Last updated:** [September 23, 2026, 2:23pm UTC](https://discourse.slicer.org/t/totalsynth-whole-body-synthetic-ct-from-mri-and-cbct-in-3d-slicer-impact-synth-and-konfai-updated/48242 "2026-09-23T14:23:25Z")

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Dear all, In February we announced the KonfAI and IMPACT-Synth extensions. Here is what is new. TotalSynth models We released TotalSynth, pretrained models for synthetic CT from MRI and from CBCT, from the head to the…

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## [2026.09.22 Weekly Meeting](https://discourse.slicer.org/t/2026-09-22-weekly-meeting/48180)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 8\
**Last updated:** [September 23, 2026, 7:03am UTC](https://discourse.slicer.org/t/2026-09-22-weekly-meeting/48180 "2026-09-23T07:03:13Z")

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Title: 2026.09.22 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · September 22, …

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## [Measuring the volume of the fossa indent of bird skulls from a 3D mesh image](https://discourse.slicer.org/t/measuring-the-volume-of-the-fossa-indent-of-bird-skulls-from-a-3d-mesh-image/48236)

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**Author:** [@tami\_evans](https://discourse.slicer.org/u/tami_evans)\
**Replies:** 0\
**Last updated:** [September 23, 2026, 2:30am UTC](https://discourse.slicer.org/t/measuring-the-volume-of-the-fossa-indent-of-bird-skulls-from-a-3d-mesh-image/48236 "2026-09-23T02:30:53Z")

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New user here :slight\_smile: I am trying to measure the volume of the fossa in bird skulls from a 3D mesh scan, I believe I need to cap the indent with a closed curve and go from there, but I am a little lost. I have 15…

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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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## [Exporting Pre-Post maxillofacial quantification models to GLB](https://discourse.slicer.org/t/exporting-pre-post-maxillofacial-quantification-models-to-glb/48209)

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**Author:** [@alvaro](https://discourse.slicer.org/u/alvaro)\
**Replies:** 0\
**Last updated:** [September 21, 2026, 1:57pm UTC](https://discourse.slicer.org/t/exporting-pre-post-maxillofacial-quantification-models-to-glb/48209 "2026-09-21T13:57:51Z")

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Hi everyone, I am working on a custom scripted module in 3D Slicer tailored for Pre-Post surgical maxillofacial and orthognathic studies. My goal is to automate the export workflow for clinical web visualization: Com…

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## [MacOS arm64 build](https://discourse.slicer.org/t/macos-arm64-build/48188)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [September 21, 2026, 2:37am UTC](https://discourse.slicer.org/t/macos-arm64-build/48188 "2026-09-21T02:37:01Z")

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I was able to build the arm64 version of latest preview on my macbook. The startup was phenomenally fast compared intel builds. Is this coincidence (perhaps libraries were cached from the build process), or can we expect…

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## [Mitral valve segmentation : echo or CT-scan?](https://discourse.slicer.org/t/mitral-valve-segmentation-echo-or-ct-scan/48173)

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**Author:** [@Giueva](https://discourse.slicer.org/u/Giueva)\
**Replies:** 2\
**Last updated:** [September 21, 2026, 1:32am UTC](https://discourse.slicer.org/t/mitral-valve-segmentation-echo-or-ct-scan/48173 "2026-09-21T01:32:32Z")

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Hello everyone, i am starting to use SlicerHeart from 3D Slicer. I want to segment the open and closed mitral valve (annulus, mitral leaflet, cordae and papillary muscle). I taught the best was from 3D echo images, but i…

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## [Slicer clothing](https://discourse.slicer.org/t/slicer-clothing/48189)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 1\
**Last updated:** [September 18, 2026, 5:16pm UTC](https://discourse.slicer.org/t/slicer-clothing/48189 "2026-09-18T17:16:24Z")

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I’d like to share this file. As far as I know, it is in the most compatible format and you should be able to deliver it to some business that does embroidery in your city to have the Slicer logo on some clothes. How it …

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## [Adding data failed](https://discourse.slicer.org/t/adding-data-failed/48182)

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**Author:** [@FabricioFO](https://discourse.slicer.org/u/FabricioFO)\
**Replies:** 10\
**Last updated:** [September 16, 2026, 8:05pm UTC](https://discourse.slicer.org/t/adding-data-failed/48182 "2026-09-16T20:05:28Z")

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Hello, everyone, I’m trying to load a tiff data of 4,6 GB size and this message appears: Any advices?

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## [Radiomics ECHO 2D](https://discourse.slicer.org/t/radiomics-echo-2d/48171)

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**Author:** [@Bouthaina\_Besbes](https://discourse.slicer.org/u/Bouthaina_Besbes)\
**Replies:** 2\
**Last updated:** [September 16, 2026, 6:39pm UTC](https://discourse.slicer.org/t/radiomics-echo-2d/48171 "2026-09-16T18:39:26Z")

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Hello everybody, I m trying to extract radiomics features from echo images. And I can’t seem to understand how. I can segment the images, but when I use de radiomics slicer extension, I can’t apply it to my ROI. I don…

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## [Projecting surface landmarks on sample model to target model in ALPACA](https://discourse.slicer.org/t/projecting-surface-landmarks-on-sample-model-to-target-model-in-alpaca/48170)

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**Author:** [@JYTan](https://discourse.slicer.org/u/JYTan)\
**Replies:** 4\
**Last updated:** [September 15, 2026, 4:37pm UTC](https://discourse.slicer.org/t/projecting-surface-landmarks-on-sample-model-to-target-model-in-alpaca/48170 "2026-09-15T16:37:49Z")

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Hi, I am new user of 3D slicer. I have generated a template mesh and surface landmarks of orbital volume segmentation and wish to project same numbers of surface landmarks from the template model to a set of target model…

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## [2026.09.15 Weekly Meeting](https://discourse.slicer.org/t/2026-09-15-weekly-meeting/48107)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 2\
**Last updated:** [September 15, 2026, 3:30pm UTC](https://discourse.slicer.org/t/2026-09-15-weekly-meeting/48107 "2026-09-15T15:30:48Z")

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Title: 2026.09.15 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · September 15, …

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## [Is there a tool similar to Viewtify 3DCG?](https://discourse.slicer.org/t/is-there-a-tool-similar-to-viewtify-3dcg/45845)

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**Author:** [@eNable\_Polska](https://discourse.slicer.org/u/eNable_Polska)\
**Replies:** 12\
**Last updated:** [September 15, 2026, 2:42am UTC](https://discourse.slicer.org/t/is-there-a-tool-similar-to-viewtify-3dcg/45845 "2026-09-15T02:42:06Z")

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Is there a tool in Slicer that allows me to achieve a similar effect as in the attached image?

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## [How does the Margin (grow/shrink) effect handle anisotropic voxel spacing?](https://discourse.slicer.org/t/how-does-the-margin-grow-shrink-effect-handle-anisotropic-voxel-spacing/48113)

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**Author:** [@Farah\_BH](https://discourse.slicer.org/u/Farah_BH)\
**Replies:** 1\
**Last updated:** [September 14, 2026, 10:10pm UTC](https://discourse.slicer.org/t/how-does-the-margin-grow-shrink-effect-handle-anisotropic-voxel-spacing/48113 "2026-09-14T22:10:31Z")

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Hello, I’m using the Margin effect in Segment Editor to isotropically expand a segment on CT data with anisotropic voxel spacing. When I request a 3.00 mm margin, the UI reports an actual expansion of 2.9 × 2.9 × 2.5 mm…

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## [Applying boundary constraints to DRR volumes in SlicerAutoscoperM](https://discourse.slicer.org/t/applying-boundary-constraints-to-drr-volumes-in-slicerautoscoperm/48084)

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**Author:** [@Dorte](https://discourse.slicer.org/u/Dorte)\
**Replies:** 1\
**Last updated:** [September 14, 2026, 2:23pm UTC](https://discourse.slicer.org/t/applying-boundary-constraints-to-drr-volumes-in-slicerautoscoperm/48084 "2026-09-14T14:23:55Z")

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

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## [Correct workflow for loading 4D CT cardiac data](https://discourse.slicer.org/t/correct-workflow-for-loading-4d-ct-cardiac-data/48121)

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**Author:** [@arumiat](https://discourse.slicer.org/u/arumiat)\
**Replies:** 4\
**Last updated:** [September 14, 2026, 8:41am UTC](https://discourse.slicer.org/t/correct-workflow-for-loading-4d-ct-cardiac-data/48121 "2026-09-14T08:41:53Z")

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Hi Slicer Community, I have a .nii file which is a 4D-gated cardiac CT but I am struggling to load it in Slicer in a way whereby I can watch the heart beating. Is there a specific workflow I need to follow. So far I ha…

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## [An Extension for colon tumor detection/localization on CT scan in 3D Slicer?](https://discourse.slicer.org/t/an-extension-for-colon-tumor-detection-localization-on-ct-scan-in-3d-slicer/48151)

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**Author:** [@qn\_Huynh](https://discourse.slicer.org/u/qn_Huynh)\
**Replies:** 3\
**Last updated:** [September 14, 2026, 5:23am UTC](https://discourse.slicer.org/t/an-extension-for-colon-tumor-detection-localization-on-ct-scan-in-3d-slicer/48151 "2026-09-14T05:23:06Z")

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An Extension for colon tumor detection/localization on CT scan in 3D Slicer I am very interested in the project developed by Xu and colleagues, entitled “An Open-Source Implementation of Colon CAD in 3D Slicer.” The art…

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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