# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&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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## [Recreating segmentation from 3D models](https://discourse.slicer.org/t/recreating-segmentation-from-3d-models/44922)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 7\
**Last updated:** [November 1, 2025, 8:20pm UTC](https://discourse.slicer.org/t/recreating-segmentation-from-3d-models/44922 "2025-11-01T20:20:00Z")

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Let’s say I have the original volume, and the segmentation object saved as a 3D model (like ply) on the disk, but not the actual seg.nrrd file. What is the suggested operation to reconstitute the segmentation map close…

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## [How to create ECV mapps with 3D slicer ](https://discourse.slicer.org/t/how-to-create-ecv-mapps-with-3d-slicer/44936)

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**Author:** [@Nara](https://discourse.slicer.org/u/Nara)\
**Replies:** 0\
**Last updated:** [November 1, 2025, 7:45pm UTC](https://discourse.slicer.org/t/how-to-create-ecv-mapps-with-3d-slicer/44936 "2025-11-01T19:45:57Z")

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Hello, I need to use 3D slicer to create ECV map, but when I try to import DICOM files (on a CD), and use the T1 ECV Mapping extension, I can’t find and upload the imput volumes!! Do I need the internet to do so? Or is …

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## [Help with OAR Contouring Workflow and RTSTRUCT Export for Radiotherapy Using 3D Slicer](https://discourse.slicer.org/t/help-with-oar-contouring-workflow-and-rtstruct-export-for-radiotherapy-using-3d-slicer/44935)

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**Author:** [@RAJVEER\_RUPEN](https://discourse.slicer.org/u/RAJVEER_RUPEN)\
**Replies:** 0\
**Last updated:** [November 1, 2025, 7:45pm UTC](https://discourse.slicer.org/t/help-with-oar-contouring-workflow-and-rtstruct-export-for-radiotherapy-using-3d-slicer/44935 "2025-11-01T19:45:40Z")

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Hello everyone, I am Dr.RUPEN RAJVIR , BHMS, currently in the process of learning OAR (Organs at Risk) contouring using 3D Slicer. My present work is purely for training and research purposes (non-clinical), and in the…

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## [Help transferring semi-landmarks to multiple specimens using ALPACA](https://discourse.slicer.org/t/help-transferring-semi-landmarks-to-multiple-specimens-using-alpaca/44919)

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**Author:** [@r\_dientes](https://discourse.slicer.org/u/r_dientes)\
**Replies:** 6\
**Last updated:** [October 31, 2025, 7:53pm UTC](https://discourse.slicer.org/t/help-transferring-semi-landmarks-to-multiple-specimens-using-alpaca/44919 "2025-10-31T19:53:46Z")

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Hi everyone, I’m working with a collection of archaeological human teeth (permanent canines) and I’m trying to transfer a set of semi-landmarks from a reference model to several specimens. Here’s my current workflow: …

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## [Hounsfields units in Version 5.8.1 for windows](https://discourse.slicer.org/t/hounsfields-units-in-version-5-8-1-for-windows/44925)

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**Author:** [@Kerstin\_Amort](https://discourse.slicer.org/u/Kerstin_Amort)\
**Replies:** 1\
**Last updated:** [October 31, 2025, 12:16pm UTC](https://discourse.slicer.org/t/hounsfields-units-in-version-5-8-1-for-windows/44925 "2025-10-31T12:16:57Z")

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Hello All, after updating the version we are not able to see the HU measurements in the “statistics” part. Is there a way to measure mean, minimum and maximum HU values with presentation in the statistic part? Thank you

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## [Breaking Linux downloads](https://discourse.slicer.org/t/breaking-linux-downloads/44342)

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**Author:** [@abitrolly](https://discourse.slicer.org/u/abitrolly)\
**Replies:** 5\
**Last updated:** [October 30, 2025, 7:34pm UTC](https://discourse.slicer.org/t/breaking-linux-downloads/44342 "2025-10-30T19:34:56Z")

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Unable to download 3D Slicer for Linux. $ wget -c https://slicer-packages.kitware.com/api/v1/item/67c51fc129825655577cfee9/download Saving 'download' Just got 32571392 of 402316524 bytes (https://slicer-packages.kitware…

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## [Get data of patient from images](https://discourse.slicer.org/t/get-data-of-patient-from-images/14693)

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**Author:** [@Valentina\_Mejia\_Gall](https://discourse.slicer.org/u/Valentina_Mejia_Gall)\
**Replies:** 2\
**Last updated:** [October 30, 2025, 4:43pm UTC](https://discourse.slicer.org/t/get-data-of-patient-from-images/14693 "2025-10-30T16:43:34Z")

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Hello, I download a CTSCAN of the lower limb, this images includes femur, tibia, etc. How could i know the mass, height or data of the patient from these files in 3Dslicer?

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## [US segmentation, imaging browsing](https://discourse.slicer.org/t/us-segmentation-imaging-browsing/44916)

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**Author:** [@sunmichaelj](https://discourse.slicer.org/u/sunmichaelj)\
**Replies:** 1\
**Last updated:** [October 30, 2025, 3:14am UTC](https://discourse.slicer.org/t/us-segmentation-imaging-browsing/44916 "2025-10-30T03:14:08Z")

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Hello, I am trying to segment some ultrasound images. I imported the whole DICOM into Slicer but the images are out of order. Is there a way to sort the images so they are in order and if so, is there a way to scroll t…

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## [Can't view DICOM in native plane](https://discourse.slicer.org/t/cant-view-dicom-in-native-plane/44889)

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**Author:** [@invictus](https://discourse.slicer.org/u/invictus)\
**Replies:** 7\
**Last updated:** [October 29, 2025, 7:36pm UTC](https://discourse.slicer.org/t/cant-view-dicom-in-native-plane/44889 "2025-10-29T19:36:37Z")

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Operating system: Windows 11 Slicer version: 5.9.0-2025-10-23 Expected behavior: Scroll through a stack of DICOM images in the plane acquired. Actual behavior: Plane is listed as ‘Reformat’, scroll tool doesn’t work, …

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## [3D rendering bug for models imported to segment?](https://discourse.slicer.org/t/3d-rendering-bug-for-models-imported-to-segment/44892)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 19\
**Last updated:** [October 29, 2025, 2:49pm UTC](https://discourse.slicer.org/t/3d-rendering-bug-for-models-imported-to-segment/44892 "2025-10-29T14:49:25Z")

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There is something confusing going on when I try to import a model to segment (either via right-click in SH and choose convert to segmentation, or use SlicerMorph’s ImportSurfaceToSegment module). Here is a screenshot d…

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## [Application start of time taking 30+ minutes.](https://discourse.slicer.org/t/application-start-of-time-taking-30-minutes/44908)

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**Author:** [@marto045](https://discourse.slicer.org/u/marto045)\
**Replies:** 1\
**Last updated:** [October 29, 2025, 2:33am UTC](https://discourse.slicer.org/t/application-start-of-time-taking-30-minutes/44908 "2025-10-29T02:33:39Z")

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My application takes about 20-30 minutes to s It works fine when it finally opens. I have tried to uninstall the application and reinstall with no luck. It gets on this attached picture. Wondering if anyone had recs to h…

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## [Slicer extension installation](https://discourse.slicer.org/t/slicer-extension-installation/25004)

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**Author:** [@Mohammad](https://discourse.slicer.org/u/Mohammad)\
**Replies:** 5\
**Last updated:** [October 28, 2025, 3:53am UTC](https://discourse.slicer.org/t/slicer-extension-installation/25004 "2025-10-28T03:53:21Z")

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Dear support, Currently I’ve tried to install a extension from GitHub for 3D slicer (GitHub - PerkLab/SlicerSkinMouldGenerator: 3D Slicer extension for generating 3D-printable skin moulds for radiation therapy). I have…

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## [TotalSegmentator: Failed to install required packages ](https://discourse.slicer.org/t/totalsegmentator-failed-to-install-required-packages/38405)

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**Author:** [@gsmattay](https://discourse.slicer.org/u/gsmattay)\
**Replies:** 13\
**Last updated:** [October 27, 2025, 8:22pm UTC](https://discourse.slicer.org/t/totalsegmentator-failed-to-install-required-packages/38405 "2025-10-27T20:22:17Z")

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Operating system: MacOS Big Sur 11.4 Slicer version: 5.6.2 Hello, I have installed Slicer, installed Pytorch version 2.2.2 via the Pytorch utils module, installed the 3d segmentator module, and restarted Slicer. When …

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## [Segmentation grow from seeds or fill between slices crashes](https://discourse.slicer.org/t/segmentation-grow-from-seeds-or-fill-between-slices-crashes/44887)

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**Author:** [@FinnR](https://discourse.slicer.org/u/FinnR)\
**Replies:** 1\
**Last updated:** [October 27, 2025, 2:27pm UTC](https://discourse.slicer.org/t/segmentation-grow-from-seeds-or-fill-between-slices-crashes/44887 "2025-10-27T14:27:00Z")

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When trying to segment by (1) painting selected slices and using ”fill in between slices” or (2) “grow from seeds” the program crashes and exits a few seconds after pressing “initialize”. The number of slices involved is…

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## [Saved stl files are very big and fail to load into win11 3D viewer](https://discourse.slicer.org/t/saved-stl-files-are-very-big-and-fail-to-load-into-win11-3d-viewer/44880)

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**Author:** [@FinnR](https://discourse.slicer.org/u/FinnR)\
**Replies:** 3\
**Last updated:** [October 26, 2025, 9:21pm UTC](https://discourse.slicer.org/t/saved-stl-files-are-very-big-and-fail-to-load-into-win11-3d-viewer/44880 "2025-10-26T21:21:11Z")

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Operating system: Windows 11 Slicer version: 5.8 Expected behavior: exported .stl should be viewable in, e.g., Win 11 3D viewer. Actual behavior: The exported .stl’s are huge (c. 5 GB, or 2.5 GB if “only visible sli…

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## [total segmentation issue](https://discourse.slicer.org/t/total-segmentation-issue/44879)

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**Author:** [@Ranjit](https://discourse.slicer.org/u/Ranjit)\
**Replies:** 1\
**Last updated:** [October 26, 2025, 12:17am UTC](https://discourse.slicer.org/t/total-segmentation-issue/44879 "2025-10-26T00:17:43Z")

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I was trying to use 3D slicer software for total segmentation, and I am getting this error. Does somebody knows how to fix this error? Failed to compute results. Command ‘\[‘C:/ProgramData/slicer.org/Slicer 5.8.1/bin/..…

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## [Remapping keys via qt.QShortcut()](https://discourse.slicer.org/t/remapping-keys-via-qt-qshortcut/44869)

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**Author:** [@tas47](https://discourse.slicer.org/u/tas47)\
**Replies:** 1\
**Last updated:** [October 25, 2025, 2:54pm UTC](https://discourse.slicer.org/t/remapping-keys-via-qt-qshortcut/44869 "2025-10-25T14:54:51Z")

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Hello all, I was wondering if there was anyway to remap shortcut keys that are already used: example say Ctrl+9 is already used for another shortcut or maybe not available: is there a way to free it up and remap to t…

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## [Generate DRRs from a 3DCT. Distance paramters in Python](https://discourse.slicer.org/t/generate-drrs-from-a-3dct-distance-paramters-in-python/44868)

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**Author:** [@ruju](https://discourse.slicer.org/u/ruju)\
**Replies:** 2\
**Last updated:** [October 25, 2025, 2:00pm UTC](https://discourse.slicer.org/t/generate-drrs-from-a-3dct-distance-paramters-in-python/44868 "2025-10-25T14:00:34Z")

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Hi, I have another question about the computation of DRRs in 3D slicer. In the GUI of the DRR Image Computation module I can change the isocenter to imager distance. Is it also possible to modify this parameter in a Pyt…

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## [Segment statistics; what am I looking at?](https://discourse.slicer.org/t/segment-statistics-what-am-i-looking-at/44861)

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**Author:** [@valblom](https://discourse.slicer.org/u/valblom)\
**Replies:** 1\
**Last updated:** [October 24, 2025, 1:32pm UTC](https://discourse.slicer.org/t/segment-statistics-what-am-i-looking-at/44861 "2025-10-24T13:32:25Z")

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Operating system: Slicer version: 3D Slicer 5.6.2 Hi! I am using Segment Statistics. The input consists of a PET scan and a segmentation. The output creates a table. Min, max, mean, median and standard deviation are p…

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## [Help with segmentation of 3D scans of wood](https://discourse.slicer.org/t/help-with-segmentation-of-3d-scans-of-wood/44745)

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**Author:** [@franco\_otaola](https://discourse.slicer.org/u/franco_otaola)\
**Replies:** 7\
**Last updated:** [October 24, 2025, 12:40pm UTC](https://discourse.slicer.org/t/help-with-segmentation-of-3d-scans-of-wood/44745 "2025-10-24T12:40:12Z")

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Hello, I just began using slicer 3D, it is quite powerfull tool! I am not using it for medical application, but in material science. I have 3D scans from wood, that I would like to segment. when the data has been imp…

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## [Slicer error in getting segmentation when using monai label](https://discourse.slicer.org/t/slicer-error-in-getting-segmentation-when-using-monai-label/35477)

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**Author:** [@Sheng-xc](https://discourse.slicer.org/u/Sheng-xc)\
**Replies:** 4\
**Last updated:** [October 24, 2025, 2:39am UTC](https://discourse.slicer.org/t/slicer-error-in-getting-segmentation-when-using-monai-label/35477 "2025-10-24T02:39:58Z")

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Hi, I am working with Slicer5.6.2 and MONAILabel on my mac, using port forwarding from a Ubuntu server. The connection, server log, and client interface seem pretty good, but a slicer error raises everytime I try to g…

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## [BoneReconstructionPlanner: not able to make hemimandibulectomy](https://discourse.slicer.org/t/bonereconstructionplanner-not-able-to-make-hemimandibulectomy/44838)

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**Author:** [@Davi\_Matos](https://discourse.slicer.org/u/Davi_Matos)\
**Replies:** 4\
**Last updated:** [October 24, 2025, 1:13am UTC](https://discourse.slicer.org/t/bonereconstructionplanner-not-able-to-make-hemimandibulectomy/44838 "2025-10-24T01:13:14Z")

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Hello! I am getting used to use the extension to plan for ressections, but I’m finding some problems that I’m not being able to solve on my own. I’m trying to plan the ressection from the left side of a mandible, but the…

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## [How do I "turn inside out" an model?](https://discourse.slicer.org/t/how-do-i-turn-inside-out-an-model/44802)

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**Author:** [@eNable\_Polska](https://discourse.slicer.org/u/eNable_Polska)\
**Replies:** 7\
**Last updated:** [October 23, 2025, 6:36pm UTC](https://discourse.slicer.org/t/how-do-i-turn-inside-out-an-model/44802 "2025-10-23T18:36:28Z")

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I’m tasked with creating a model of the airways, down to the smallest possible viewing distance. The initial study is an HRCT of the lungs. I used the “Lung CT Segmenter” tool with the “Airway segmentation,” “Use AI,” an…

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## [Merging Segments from 3 different scans](https://discourse.slicer.org/t/merging-segments-from-3-different-scans/44862)

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**Author:** [@Richard](https://discourse.slicer.org/u/Richard)\
**Replies:** 1\
**Last updated:** [October 23, 2025, 5:58pm UTC](https://discourse.slicer.org/t/merging-segments-from-3-different-scans/44862 "2025-10-23T17:58:25Z")

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Hi! New to 3D slicer so I hope the question is not too basic: I am working on a project where I segmented an implant from one patient from 3 different CT scans from 3 different time points. To visualize any deformation …

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## [Exporting segmentation to PACS (Philips/Carestream)](https://discourse.slicer.org/t/exporting-segmentation-to-pacs-philips-carestream/44864)

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**Author:** [@mariacdev](https://discourse.slicer.org/u/mariacdev)\
**Replies:** 0\
**Last updated:** [October 23, 2025, 5:33pm UTC](https://discourse.slicer.org/t/exporting-segmentation-to-pacs-philips-carestream/44864 "2025-10-23T17:33:50Z")

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Hi, I’d like to export a segmentation from 3D Slicer and import it into our research PACS (Philips/Carestream), so that it can be both visualized as an overlay on CT images and stored there. Has anyone done this before?…

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## [Help locating legacy “Expand” / 2D Grow tool for subdural segmentation](https://discourse.slicer.org/t/help-locating-legacy-expand-2d-grow-tool-for-subdural-segmentation/44863)

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**Author:** [@Neuroanatomist](https://discourse.slicer.org/u/Neuroanatomist)\
**Replies:** 0\
**Last updated:** [October 23, 2025, 5:33pm UTC](https://discourse.slicer.org/t/help-locating-legacy-expand-2d-grow-tool-for-subdural-segmentation/44863 "2025-10-23T17:33:38Z")

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Hello, A while ago, I used the legacy Segment Editor in 3D Slicer, which had a tool that allowed me to expand or grow a segment with a single click. I don’t remember its exact name, but it worked for segmenting subdural…

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## [SegmentWithSAM module not working](https://discourse.slicer.org/t/segmentwithsam-module-not-working/44800)

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**Author:** [@Jessica\_de\_Kort](https://discourse.slicer.org/u/Jessica_de_Kort)\
**Replies:** 4\
**Last updated:** [October 23, 2025, 2:30am UTC](https://discourse.slicer.org/t/segmentwithsam-module-not-working/44800 "2025-10-23T02:30:50Z")

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Hello! I am trying to use SegmentWithSAM module. I downloaded it through Extension Wizard, restarted Slicer a few times, and the module has no prompts or buttons on the left hand side of the screen. I looked at the error…

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## [Feature request: add more recent file history facilities](https://discourse.slicer.org/t/feature-request-add-more-recent-file-history-facilities/44848)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 0\
**Last updated:** [October 22, 2025, 5:30pm UTC](https://discourse.slicer.org/t/feature-request-add-more-recent-file-history-facilities/44848 "2025-10-22T17:30:04Z")

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The recent file history disables menu items when the referenced files are not found when Slicer starts. The missing files may be available again if they are on removable media. They may also never appear again and occupy…

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## [Generate digitally reconstructed radiograph from an 3DCT. How to choose different controllpoints of an arc beam?](https://discourse.slicer.org/t/generate-digitally-reconstructed-radiograph-from-an-3dct-how-to-choose-different-controllpoints-of-an-arc-beam/44798)

<div class="topic-metadata">

**Author:** [@ruju](https://discourse.slicer.org/u/ruju)\
**Replies:** 6\
**Last updated:** [October 22, 2025, 1:07pm UTC](https://discourse.slicer.org/t/generate-digitally-reconstructed-radiograph-from-an-3dct-how-to-choose-different-controllpoints-of-an-arc-beam/44798 "2025-10-22T13:07:06Z")

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Hello, I would like to create some DRRs from a 3DCT. I have one arc beam with some different controllpoints. If I want to generate a DRR with DDR Image Computation of this beam, it only generates a DRR for the first bea…

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## [Automatic Lesion Segmentation on Liver](https://discourse.slicer.org/t/automatic-lesion-segmentation-on-liver/44717)

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**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 3\
**Last updated:** [October 22, 2025, 9:04am UTC](https://discourse.slicer.org/t/automatic-lesion-segmentation-on-liver/44717 "2025-10-22T09:04:09Z")

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Dear Expert, Is there any extension that can segment lesions/tumors on the Liver? CTA image or any CT images.

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