# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=38

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

**Page:** 39

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## [Extensions-manager](https://discourse.slicer.org/t/extensions-manager/43226)

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**Author:** [@zxy](https://discourse.slicer.org/u/zxy)\
**Replies:** 0\
**Last updated:** [June 5, 2025, 6:27am UTC](https://discourse.slicer.org/t/extensions-manager/43226 "2025-06-05T06:27:05Z")

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Why does the Bone Thickness Mapping extension in version 4.11 show the result as seen in the image after execution?

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## [I am currently facing an issue with the Elastix registration module in 3D Slicer ](https://discourse.slicer.org/t/i-am-currently-facing-an-issue-with-the-elastix-registration-module-in-3d-slicer/42217)

<div class="topic-metadata">

**Author:** [@xiaoguan](https://discourse.slicer.org/u/xiaoguan)\
**Replies:** 2\
**Last updated:** [March 20, 2025, 11:16am UTC](https://discourse.slicer.org/t/i-am-currently-facing-an-issue-with-the-elastix-registration-module-in-3d-slicer/42217 "2025-03-20T11:16:12Z")

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Dear users of slicer, I hope this message finds you well. I am currently facing an issue with the Elastix registration module in 3D Slicer and would greatly appreciate your assistance in resolving it.The error log is be…

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## [How to convert xml file to RT Struct](https://discourse.slicer.org/t/how-to-convert-xml-file-to-rt-struct/43225)

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**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 0\
**Last updated:** [June 5, 2025, 3:26am UTC](https://discourse.slicer.org/t/how-to-convert-xml-file-to-rt-struct/43225 "2025-06-05T03:26:24Z")

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Dear Expert, I have xml file (xml folder) that I done contouring on that file. The original file also I have as attached. Both file can get here: File XML and Original Anyone can help me to convert xml file to RT Stru…

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## [Segmentation of breast tumors](https://discourse.slicer.org/t/segmentation-of-breast-tumors/43181)

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**Author:** [@Meltem](https://discourse.slicer.org/u/Meltem)\
**Replies:** 2\
**Last updated:** [June 4, 2025, 5:35am UTC](https://discourse.slicer.org/t/segmentation-of-breast-tumors/43181 "2025-06-04T05:35:26Z")

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Hello, I am Meltem. New here. I have downloaded 3d Slicer 5.8.1. I have chosen the second phase of dynamic contrasted breas MRI to segment, and I want to segment the tumor via threshold (it’s a very complex tumor, manual…

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## [Incorrect values when converting segmentation to binary labelmap](https://discourse.slicer.org/t/incorrect-values-when-converting-segmentation-to-binary-labelmap/43190)

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**Author:** [@JASON](https://discourse.slicer.org/u/JASON)\
**Replies:** 20\
**Last updated:** [June 3, 2025, 10:13pm UTC](https://discourse.slicer.org/t/incorrect-values-when-converting-segmentation-to-binary-labelmap/43190 "2025-06-03T22:13:00Z")

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I have noticed that converting a segmentation to binary labelmap causes all label values to be remapped from their current value to the segment’s index (1 … n+1). This is true for UI option “Export visible segments to b…

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## [HD-BET installation](https://discourse.slicer.org/t/hd-bet-installation/42727)

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**Author:** [@Claudia\_Takyi](https://discourse.slicer.org/u/Claudia_Takyi)\
**Replies:** 1\
**Last updated:** [June 3, 2025, 8:07pm UTC](https://discourse.slicer.org/t/hd-bet-installation/42727 "2025-06-03T20:07:04Z")

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Please, I am new to 3D Slicer. I am trying to use the HD-BET tool for a project but i can’t find it in the modules of my 3D Slicer application. Can anyone help me install this ?

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## [Preview builds not generated](https://discourse.slicer.org/t/preview-builds-not-generated/43201)

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**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 0\
**Last updated:** [June 3, 2025, 9:17am UTC](https://discourse.slicer.org/t/preview-builds-not-generated/43201 "2025-06-03T09:17:04Z")

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Hello. The Slicer packages for Jun 02 don’t seem to have been generated. Is this expected? Many of the extensions, on the other hand, seem to be generated correctly.

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## [3D print CT of a skull without holes](https://discourse.slicer.org/t/3d-print-ct-of-a-skull-without-holes/43095)

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**Author:** [@hoteh](https://discourse.slicer.org/u/hoteh)\
**Replies:** 7\
**Last updated:** [June 3, 2025, 6:22am UTC](https://discourse.slicer.org/t/3d-print-ct-of-a-skull-without-holes/43095 "2025-06-03T06:22:22Z")

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I would like to 3D print a CT of a skull. The problem is, there are a lot of holes and islands in the scan. Is there any automatic tool to help? Other than manually filling the holes with “Paint” and removing the easy i…

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## [WM/GM/CSF Segmentation in FLAIR, T2\*, DWI, TOF Sequences](https://discourse.slicer.org/t/wm-gm-csf-segmentation-in-flair-t2-dwi-tof-sequences/43198)

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**Author:** [@m\_vanessa](https://discourse.slicer.org/u/m_vanessa)\
**Replies:** 0\
**Last updated:** [June 3, 2025, 5:18am UTC](https://discourse.slicer.org/t/wm-gm-csf-segmentation-in-flair-t2-dwi-tof-sequences/43198 "2025-06-03T05:18:02Z")

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Hi everyone, I’m looking for recommended methods or modules in 3D Slicer for segmenting white matter, gray matter, and CSF in MRI sequences like FLAIR, T2\*, DWI, and TOF . Are there tools or workflows that handle these…

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## [vBMD and automatic segmentation ](https://discourse.slicer.org/t/vbmd-and-automatic-segmentation/43197)

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**Author:** [@Nora14](https://discourse.slicer.org/u/Nora14)\
**Replies:** 0\
**Last updated:** [June 3, 2025, 5:17am UTC](https://discourse.slicer.org/t/vbmd-and-automatic-segmentation/43197 "2025-06-03T05:17:49Z")

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Hello, I am new to 3D Slicer and I need to segment the femoral neck and calculate the vBMD of the femur from CT, if possible that the regions of interest can be automatically selected. The goal is to compare the pre- an…

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## [SlicerVirtualReality](https://discourse.slicer.org/t/slicervirtualreality/43067)

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**Author:** [@JaredAmudeo](https://discourse.slicer.org/u/JaredAmudeo)\
**Replies:** 1\
**Last updated:** [June 2, 2025, 1:04pm UTC](https://discourse.slicer.org/t/slicervirtualreality/43067 "2025-06-02T13:04:40Z")

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Hello! Does anyone know how I can install the Slicer VR module? I’m currently using version 5.7.0-2024-09-03, and it doesn’t appear in the extensions manager. Should I update to the latest version, or is there a way to i…

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## [Best way to segment and view semi-circular canals from CT scan in 3D](https://discourse.slicer.org/t/best-way-to-segment-and-view-semi-circular-canals-from-ct-scan-in-3d/41004)

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**Author:** [@Holdmybrain](https://discourse.slicer.org/u/Holdmybrain)\
**Replies:** 5\
**Last updated:** [June 2, 2025, 10:59am UTC](https://discourse.slicer.org/t/best-way-to-segment-and-view-semi-circular-canals-from-ct-scan-in-3d/41004 "2025-06-02T10:59:15Z")

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Hey guys and gals, I’m a patient with a keen interest in understanding and visualising scans better and have just started learning to use Slicer (on Macosx version 5.2.2). I’ve been playing around with creating basic r…

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## [How to make AI software to mapping cortical bone thickness](https://discourse.slicer.org/t/how-to-make-ai-software-to-mapping-cortical-bone-thickness/43183)

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**Author:** [@EsraaIsmail95](https://discourse.slicer.org/u/EsraaIsmail95)\
**Replies:** 1\
**Last updated:** [June 2, 2025, 12:54am UTC](https://discourse.slicer.org/t/how-to-make-ai-software-to-mapping-cortical-bone-thickness/43183 "2025-06-02T00:54:10Z")

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Hello, I am a dentist and new user in this amazing software I want to make a artificial intelligence for mapping of cortical bone thickness Actually it is my thesis and this will be my research work for my master degre…

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## [Exporting dicom images as one set](https://discourse.slicer.org/t/exporting-dicom-images-as-one-set/43180)

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**Author:** [@folkertvanheusden](https://discourse.slicer.org/u/folkertvanheusden)\
**Replies:** 3\
**Last updated:** [June 2, 2025, 12:40am UTC](https://discourse.slicer.org/t/exporting-dicom-images-as-one-set/43180 "2025-06-02T00:40:10Z")

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Hi, I would like to use Slicer as a tool to convert a dicom-set into a new decompressed set. I can succesfully load the set (study?) and export as dicom, but this gives 76 individual sets with each 1 dicom-image. How c…

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## [Nninteractive\_slicer\_server Does not start](https://discourse.slicer.org/t/nninteractive-slicer-server-does-not-start/43066)

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**Author:** [@eNable\_Polska](https://discourse.slicer.org/u/eNable_Polska)\
**Replies:** 2\
**Last updated:** [May 31, 2025, 2:55pm UTC](https://discourse.slicer.org/t/nninteractive-slicer-server-does-not-start/43066 "2025-05-31T14:55:40Z")

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I had been using nninteractive\_slicer\_server for segmentation for some time and everything worked fine. Unfortunately, since a few days the server stopped working. I am running ArchLinux, all packages and drivers are up…

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## [Guidance for improving first heart segmentation](https://discourse.slicer.org/t/guidance-for-improving-first-heart-segmentation/43093)

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**Author:** [@Sipan\_Hovsepian](https://discourse.slicer.org/u/Sipan_Hovsepian)\
**Replies:** 6\
**Last updated:** [May 31, 2025, 1:53pm UTC](https://discourse.slicer.org/t/guidance-for-improving-first-heart-segmentation/43093 "2025-05-31T13:53:01Z")

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Dear Community This is my first attempt of heart segmentation following the tutorial (Link), I found from this community. I would greatly appreciate any feedback for improvement. (maybe increasing the number of seed…

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## [4DCT dicom import and save](https://discourse.slicer.org/t/4dct-dicom-import-and-save/43135)

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**Author:** [@Amy\_Morton](https://discourse.slicer.org/u/Amy_Morton)\
**Replies:** 4\
**Last updated:** [May 30, 2025, 2:49pm UTC](https://discourse.slicer.org/t/4dct-dicom-import-and-save/43135 "2025-05-30T14:49:58Z")

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I found many helpful topics on the discourse, but still have yet to find a full soluiton: I have 100+ 4dct scans in dicom format, I’d like to import them and save as .nrrd or .seq.nrrd When loaded using the import dico…

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## [Segment tooth crown and root](https://discourse.slicer.org/t/segment-tooth-crown-and-root/43166)

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**Author:** [@Ayush](https://discourse.slicer.org/u/Ayush)\
**Replies:** 0\
**Last updated:** [May 30, 2025, 12:49pm UTC](https://discourse.slicer.org/t/segment-tooth-crown-and-root/43166 "2025-05-30T12:49:34Z")

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I have segmented a tooth from a full mouth cbct scan now I want to segment tooth in crown and root by 3d slicer. How can i do that automatically or manually?

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## [SlicerStable - extensions are not being built for Linux on cdash](https://discourse.slicer.org/t/slicerstable-extensions-are-not-being-built-for-linux-on-cdash/42896)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 6\
**Last updated:** [May 30, 2025, 12:40pm UTC](https://discourse.slicer.org/t/slicerstable-extensions-are-not-being-built-for-linux-on-cdash/42896 "2025-05-30T12:40:44Z")

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No extension is being built for Linux on cdash since a few weeks, there is simply no line for Linux. I just want to highlight it in case it went unnoticed. Or may be there are known reasons.

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## [Slicer 5.8.1 C++20 support](https://discourse.slicer.org/t/slicer-5-8-1-c-20-support/43097)

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**Author:** [@sogo](https://discourse.slicer.org/u/sogo)\
**Replies:** 4\
**Last updated:** [May 30, 2025, 3:25am UTC](https://discourse.slicer.org/t/slicer-5-8-1-c-20-support/43097 "2025-05-30T03:25:10Z")

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Build config Slicer Tag 5.8.1 OS = Windows 11 pro 24H2 Visual studio = 2019 v16.11.31, toolset v142 CMake 3.28.0-rc2 QT5 5.15.17 Hi, I am trying to build Slicer with variable “CMAKE\_CXX\_STANDARD” set to ‘20’ but …

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## [Sliding semi-landmarks](https://discourse.slicer.org/t/sliding-semi-landmarks/43101)

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**Author:** [@elg67](https://discourse.slicer.org/u/elg67)\
**Replies:** 4\
**Last updated:** [May 30, 2025, 1:24am UTC](https://discourse.slicer.org/t/sliding-semi-landmarks/43101 "2025-05-30T01:24:00Z")

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Hiya! I’m currently trying to apply sliding semi-landmarks to a dataset (x20 crania/scapulae/clavicles/pelvises) with fixed landmarks already applied. I tried to use the curves to create SSL between landmarks as per Rolf…

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## [MorphoCloud Instance Issue](https://discourse.slicer.org/t/morphocloud-instance-issue/42645)

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**Author:** [@Ellie\_In](https://discourse.slicer.org/u/Ellie_In)\
**Replies:** 3\
**Last updated:** [May 29, 2025, 7:38pm UTC](https://discourse.slicer.org/t/morphocloud-instance-issue/42645 "2025-05-29T19:38:30Z")

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I was wondering if anyone had any experience with MorphoCloud instances and could help me figure out what is going wrong. When I try to unshelve my instance, I get an error that says “failed to associate floating IP w…

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## [3d Slicer in Ubuntu 16.04](https://discourse.slicer.org/t/3d-slicer-in-ubuntu-16-04/11284)

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**Author:** [@CHRIS\_HUYNH](https://discourse.slicer.org/u/CHRIS_HUYNH)\
**Replies:** 6\
**Last updated:** [May 28, 2025, 12:31pm UTC](https://discourse.slicer.org/t/3d-slicer-in-ubuntu-16-04/11284 "2025-05-28T12:31:34Z")

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Hi, I’m trying to run 3D Slicer in ubuntu 16.04. I’ve downloaded the Linux version of slicer, opened the tar.gz file and copied over the containing folder to a different location. I’m trying to run the command ./Slice…

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## [Is there any video related function? If there is no solution,how to do it](https://discourse.slicer.org/t/is-there-any-video-related-function-if-there-is-no-solution-how-to-do-it/43131)

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**Author:** [@lhefeng662](https://discourse.slicer.org/u/lhefeng662)\
**Replies:** 0\
**Last updated:** [May 28, 2025, 10:23am UTC](https://discourse.slicer.org/t/is-there-any-video-related-function-if-there-is-no-solution-how-to-do-it/43131 "2025-05-28T10:23:02Z")

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Is there any video related function? If there is no solution, you can import the video signal or local video file into the software, overlay the 3D model with the video for display, and choose to hide the video; Fusion d…

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## [Example data for Film Dosimetry Analysis](https://discourse.slicer.org/t/example-data-for-film-dosimetry-analysis/21787)

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**Author:** [@johenn66](https://discourse.slicer.org/u/johenn66)\
**Replies:** 5\
**Last updated:** [May 28, 2025, 10:01am UTC](https://discourse.slicer.org/t/example-data-for-film-dosimetry-analysis/21787 "2025-05-28T10:01:03Z")

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I am trying to locate a downloadable example dataset for the “Film Dosimetry Analysis” workflow. Can someone direct me to a downloadable dataset?

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## [How can I use GPU to accelerate General Registration (Elastix) module?](https://discourse.slicer.org/t/how-can-i-use-gpu-to-accelerate-general-registration-elastix-module/43129)

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**Author:** [@LanceDuan](https://discourse.slicer.org/u/LanceDuan)\
**Replies:** 1\
**Last updated:** [May 28, 2025, 8:17am UTC](https://discourse.slicer.org/t/how-can-i-use-gpu-to-accelerate-general-registration-elastix-module/43129 "2025-05-28T08:17:38Z")

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Hi all, I’m using General Registration (Elastix) to align two different time DICOM CT of one patient, and it works very well! However it takes such a long time, about 5min. I checked the CPU and GPU usage status. As yo…

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## [How to convert series (IM files) to one file](https://discourse.slicer.org/t/how-to-convert-series-im-files-to-one-file/41269)

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**Author:** [@amirzadeh](https://discourse.slicer.org/u/amirzadeh)\
**Replies:** 1\
**Last updated:** [May 28, 2025, 3:02am UTC](https://discourse.slicer.org/t/how-to-convert-series-im-files-to-one-file/41269 "2025-05-28T03:02:14Z")

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Hi. My MRI and CT-Angio images are in a PATH that includes many series folders with IM files that don’t have any extensions. When I add the PATH to 3d slicer it load the images in different series like the images that I’…

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## [SlicerRadiomics Extension Not Showing Up on macOS 15.5 (Slicer 5.9.0 Preview)](https://discourse.slicer.org/t/slicerradiomics-extension-not-showing-up-on-macos-15-5-slicer-5-9-0-preview/43123)

<div class="topic-metadata">

**Author:** [@Raghad](https://discourse.slicer.org/u/Raghad)\
**Replies:** 1\
**Last updated:** [May 27, 2025, 10:32pm UTC](https://discourse.slicer.org/t/slicerradiomics-extension-not-showing-up-on-macos-15-5-slicer-5-9-0-preview/43123 "2025-05-27T22:32:31Z")

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Hi, I’m trying to install and use the SlicerRadiomics extension on my Mac, but I haven’t been able to get it to show up, despite following all the instructions. System Info: macOS version: 15.5 (Sequoia) Slicer versi…

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## [Guidance on ADC Value Extraction and Rescaling Factor](https://discourse.slicer.org/t/guidance-on-adc-value-extraction-and-rescaling-factor/43124)

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**Author:** [@nima\_Taghizadeh](https://discourse.slicer.org/u/nima_Taghizadeh)\
**Replies:** 0\
**Last updated:** [May 27, 2025, 10:26pm UTC](https://discourse.slicer.org/t/guidance-on-adc-value-extraction-and-rescaling-factor/43124 "2025-05-27T22:26:14Z")

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Hello everyone, I am currently working with ADC values extracted from inhomogeneity bias-corrected brain MRIs obtained through SAMSEG and have encountered a few issues that I would greatly appreciate your insights on. …

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## [AddNewNodeByClass: basename does not increment](https://discourse.slicer.org/t/addnewnodebyclass-basename-does-not-increment/34386)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 3\
**Last updated:** [May 27, 2025, 11:52am UTC](https://discourse.slicer.org/t/addnewnodebyclass-basename-does-not-increment/34386 "2025-05-27T11:52:01Z")

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Hi, From my understanding, AddNewNodeByClass accepts a basename that would increment with a suffix on repeat calls. For example: slicer.mrmlScene.AddNewNodeByClass("vtkMRMLModelNode", "M") should yield model nodes wit…

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