# Top

**URL:** https://discourse.slicer.org/top.md?page=8

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

**Page:** 9

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## [Segment Editor crashes during Logical Operators in segment editor (Intersect) - Windows 10 - Lenovo LOQ 5.10.0](https://discourse.slicer.org/t/segment-editor-crashes-during-logical-operators-in-segment-editor-intersect-windows-10-lenovo-loq-5-10-0/45635)

<div class="topic-metadata">

**Author:** [@zahra\_Tabasi](https://discourse.slicer.org/u/zahra_Tabasi)\
**Replies:** 4\
**Last updated:** [December 30, 2025, 10:54pm UTC](https://discourse.slicer.org/t/segment-editor-crashes-during-logical-operators-in-segment-editor-intersect-windows-10-lenovo-loq-5-10-0/45635 "2025-12-30T22:54:41Z")

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Title: Segment Editor crashes during Logical Operators (Intersect) - Windows 10 - Lenovo LOQ Slicer version: 5.10.0 (stable) + preview versions tested OS: Windows 10 Hardware: Lenovo LOQ 15IRH8 (i7-13th gen, 32GB RAM,…

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## [MONAI Auto3DSeg – inconsistent performance for vertebral body segmentation](https://discourse.slicer.org/t/monai-auto3dseg-inconsistent-performance-for-vertebral-body-segmentation/46081)

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**Author:** [@jchao](https://discourse.slicer.org/u/jchao)\
**Replies:** 1\
**Last updated:** [February 8, 2026, 4:31pm UTC](https://discourse.slicer.org/t/monai-auto3dseg-inconsistent-performance-for-vertebral-body-segmentation/46081 "2026-02-08T16:31:36Z")

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Hi everyone, I’m currently working with Prof. Ron Alkalay on a spine CT segmentation project using MONAI Auto3DSeg and would appreciate any advice from the community. My task is to segment only vertebral bodies. I refo…

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## [MouseMaster Extension "module is not loaded"](https://discourse.slicer.org/t/mousemaster-extension-module-is-not-loaded/48099)

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**Author:** [@jamie.miller.phd](https://discourse.slicer.org/u/jamie.miller.phd)\
**Replies:** 3\
**Last updated:** [September 9, 2026, 2:10am UTC](https://discourse.slicer.org/t/mousemaster-extension-module-is-not-loaded/48099 "2026-09-09T02:10:53Z")

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Problem report for 3D Slicer 5.12.3 win-amd64: Trying to use the MouseMaster extension, but after downloading from extension manager, and installing from file, there is a error message in the module finder “MouseMaster m…

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## [How to fix the cracking the window when I changed the opacity from the segmentation result?](https://discourse.slicer.org/t/how-to-fix-the-cracking-the-window-when-i-changed-the-opacity-from-the-segmentation-result/47415)

<div class="topic-metadata">

**Author:** [@wnsdn0497](https://discourse.slicer.org/u/wnsdn0497)\
**Replies:** 2\
**Last updated:** [June 23, 2026, 3:13pm UTC](https://discourse.slicer.org/t/how-to-fix-the-cracking-the-window-when-i-changed-the-opacity-from-the-segmentation-result/47415 "2026-06-23T15:13:48Z")

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Hi, I am writing to fix the issue that I am encountering suddenly. All of sudden, the 3D slicer browser is cracked like below when I turned the opacity from 1.00 to somewhere. Is there anyone who faces the same issu…

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## [NIfTI (.nii.gz) loading failure for TotalSegmentator samples in 3D Slicer 5.10.0 on Apple M4 Pro](https://discourse.slicer.org/t/nifti-nii-gz-loading-failure-for-totalsegmentator-samples-in-3d-slicer-5-10-0-on-apple-m4-pro/47405)

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**Author:** [@khorlint](https://discourse.slicer.org/u/khorlint)\
**Replies:** 2\
**Last updated:** [June 22, 2026, 3:18pm UTC](https://discourse.slicer.org/t/nifti-nii-gz-loading-failure-for-totalsegmentator-samples-in-3d-slicer-5-10-0-on-apple-m4-pro/47405 "2026-06-22T15:18:29Z")

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Description: I am encountering a consistent error when loading multiple samples from the TotalSegmentator dataset in 3D Slicer (version 5.10.0) on an Apple M4 Pro machine. Environment: 3D Slicer version: 5.10.0 OS: m…

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## [General Registration (BRAINS) consistently reports the error “All samples map outside the moving image buffer,” even when the same image is used for both the fixed and moving volumes for a specific image](https://discourse.slicer.org/t/general-registration-brains-consistently-reports-the-error-all-samples-map-outside-the-moving-image-buffer-even-when-the-same-image-is-used-for-both-the-fixed-and-moving-volumes-for-a-specific-image/45677)

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**Author:** [@ffr](https://discourse.slicer.org/u/ffr)\
**Replies:** 2\
**Last updated:** [January 6, 2026, 9:34pm UTC](https://discourse.slicer.org/t/general-registration-brains-consistently-reports-the-error-all-samples-map-outside-the-moving-image-buffer-even-when-the-same-image-is-used-for-both-the-fixed-and-moving-volumes-for-a-specific-image/45677 "2026-01-06T21:34:07Z")

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I am using Windows version 5.10.0 Please find the image here. It is a normal CT image, and I don’t know why BRAINS is not working for this specific case. Thank you very much for any help.

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## [Smoothing aorta segmentations across time](https://discourse.slicer.org/t/smoothing-aorta-segmentations-across-time/46522)

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**Author:** [@tassiasalles](https://discourse.slicer.org/u/tassiasalles)\
**Replies:** 3\
**Last updated:** [March 26, 2026, 6:25pm UTC](https://discourse.slicer.org/t/smoothing-aorta-segmentations-across-time/46522 "2026-03-26T18:25:13Z")

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Good afternoon, I’m working with aorta segmentation across different cardiac frames and I was wondering if there is any way to smooth the segmentations across time (different cardiac frames) to avoid segmentations incon…

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## [Model to Model Distance Color Map Not working](https://discourse.slicer.org/t/model-to-model-distance-color-map-not-working/46273)

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**Author:** [@Nacole](https://discourse.slicer.org/u/Nacole)\
**Replies:** 3\
**Last updated:** [February 26, 2026, 10:59am UTC](https://discourse.slicer.org/t/model-to-model-distance-color-map-not-working/46273 "2026-02-26T10:59:09Z")

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Hi there, I am hoping to get some help with an issue. My goal is calculate the post op changes after bone grafting to the alveolus in cleft patients. I am having this issue. Import Pre op DICOMs–\> dental segmentor –\> M…

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## [Slicer crashes after multiple slicer.mmrlScene.Clear(0)](https://discourse.slicer.org/t/slicer-crashes-after-multiple-slicer-mmrlscene-clear-0/47801)

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**Author:** [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Replies:** 2\
**Last updated:** [August 10, 2026, 2:25pm UTC](https://discourse.slicer.org/t/slicer-crashes-after-multiple-slicer-mmrlscene-clear-0/47801 "2026-08-10T14:25:51Z")

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When processing numerous studies with a Clear(0) after each, I eventually get a fatal exception crash. Work flow is define convenience functions in the python console, (load mrb, process, save, Clear, repeat). Of cours…

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## [Level tracing tool is either an amnesiac or thinks I'm too stupid to segment on my own](https://discourse.slicer.org/t/level-tracing-tool-is-either-an-amnesiac-or-thinks-im-too-stupid-to-segment-on-my-own/47814)

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**Author:** [@Chelonian](https://discourse.slicer.org/u/Chelonian)\
**Replies:** 2\
**Last updated:** [August 8, 2026, 8:13am UTC](https://discourse.slicer.org/t/level-tracing-tool-is-either-an-amnesiac-or-thinks-im-too-stupid-to-segment-on-my-own/47814 "2026-08-08T08:13:36Z")

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Operating system: Windows 11 Pro Slicer version: 5.12.0 Expected behavior: Each level I trace using the “level tracing” tool is saved and placed into the 3d model of that segment Actual behavior: random sections (cons…

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## [What is the event to react to a point location being changed in a MarkupsNode/MarkupsLineNode?](https://discourse.slicer.org/t/what-is-the-event-to-react-to-a-point-location-being-changed-in-a-markupsnode-markupslinenode/45307)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 3\
**Last updated:** [December 4, 2025, 10:34am UTC](https://discourse.slicer.org/t/what-is-the-event-to-react-to-a-point-location-being-changed-in-a-markupsnode-markupslinenode/45307 "2025-12-04T10:34:02Z")

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Hi, To react to a point location being changed in a MarkupsLineNode I’ve been using PointModifiedEvent and I am calling one function whenever the location of a point changes. However my callback function is being called…

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## [Request for feedback on ToothAnalyserMicroCT extension PR](https://discourse.slicer.org/t/request-for-feedback-on-toothanalysermicroct-extension-pr/48077)

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**Author:** [@Lukon](https://discourse.slicer.org/u/Lukon)\
**Replies:** 2\
**Last updated:** [September 7, 2026, 3:01pm UTC](https://discourse.slicer.org/t/request-for-feedback-on-toothanalysermicroct-extension-pr/48077 "2026-09-07T15:01:21Z")

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Hi everyone, I hope this is the right place to ask for some guidance. I submitted a pull request to add our extension, ToothAnalyserMicroCT, to the Slicer Extensions Catalog: Pull Request #2342 ToothAnalyserMicroCT i…

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## [Unable to load DICOM into sequence browser](https://discourse.slicer.org/t/unable-to-load-dicom-into-sequence-browser/47813)

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**Author:** [@Rene\_Mazuela](https://discourse.slicer.org/u/Rene_Mazuela)\
**Replies:** 2\
**Last updated:** [August 5, 2026, 9:05pm UTC](https://discourse.slicer.org/t/unable-to-load-dicom-into-sequence-browser/47813 "2026-08-05T21:05:07Z")

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We’re having an inconsistent issue in 3D Slicer with loading DICOM data as a sequence. Some team members can load a DICOM series into the Sequence Browser and select the proper frame, but others do not see the option to …

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## [Is there a Python API to get MLC/Jaw position sequences from a VMAT plan?](https://discourse.slicer.org/t/is-there-a-python-api-to-get-mlc-jaw-position-sequences-from-a-vmat-plan/47323)

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**Author:** [@Aki](https://discourse.slicer.org/u/Aki)\
**Replies:** 2\
**Last updated:** [June 16, 2026, 11:16pm UTC](https://discourse.slicer.org/t/is-there-a-python-api-to-get-mlc-jaw-position-sequences-from-a-vmat-plan/47323 "2026-06-16T23:16:47Z")

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Hi, there I would like to get MLC/Jaw position sequences and dose/MU data at each control point from data imported into 3DSlicer. Is there any API to access such data. I would like to make a python script or extension t…

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## [2026.02.03 Weekly Meeting](https://discourse.slicer.org/t/2026-02-03-weekly-meeting/46044)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 2\
**Last updated:** [February 3, 2026, 4:57pm UTC](https://discourse.slicer.org/t/2026-02-03-weekly-meeting/46044 "2026-02-03T16:57:13Z")

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Tomorrow, 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: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread to …

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## [Help to Segment Small Intestine ](https://discourse.slicer.org/t/help-to-segment-small-intestine/48653)

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**Author:** [@Randy\_Peterson](https://discourse.slicer.org/u/Randy_Peterson)\
**Replies:** 4\
**Last updated:** [November 2, 2026, 8:26pm UTC](https://discourse.slicer.org/t/help-to-segment-small-intestine/48653 "2026-11-02T20:26:30Z")

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I am a Neuroendocrine cancer patient with a partial bowel obstruction in my small intestine. I have several CT scans of the area where the obstruction is located. I want to create a 3-D model to aid in surgical planning…

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## [Low resolution images - MRI](https://discourse.slicer.org/t/low-resolution-images-mri/48674)

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**Author:** [@phero1190](https://discourse.slicer.org/u/phero1190)\
**Replies:** 5\
**Last updated:** [November 5, 2026, 6:30pm UTC](https://discourse.slicer.org/t/low-resolution-images-mri/48674 "2026-11-05T18:30:23Z")

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I am trying to create a good image of my brain from an MRI I just had but when I load in the DICOM data, some of the planes are low resolution. The data I have is broken down into different subsections; sagittal, axial, …

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## [Slicer Wiki appears to be down](https://discourse.slicer.org/t/slicer-wiki-appears-to-be-down/47528)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 2\
**Last updated:** [July 6, 2026, 5:58pm UTC](https://discourse.slicer.org/t/slicer-wiki-appears-to-be-down/47528 "2026-07-06T17:58:02Z")

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I’m getting this bad gateway error on this link: https://www.slicer.org/wiki/Main\_Page/SlicerCommunity This is linked from the main page of slicer.org

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## [Add Scalar Volumes Not Functioning in Slicer 5.10.0](https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952)

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**Author:** [@Hualiama](https://discourse.slicer.org/u/Hualiama)\
**Replies:** 2\
**Last updated:** [May 7, 2026, 2:19pm UTC](https://discourse.slicer.org/t/add-scalar-volumes-not-functioning-in-slicer-5-10-0/46952 "2026-05-07T14:19:13Z")

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Good Day All, I have been working on a study of the femur with a set of scans that have been split across two DICOM series. See below image for reference. I intend to reconstruct the femur with the inferior condyle …

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## [Schengen visa for Spain from USA](https://discourse.slicer.org/t/schengen-visa-for-spain-from-usa/45320)

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**Author:** [@Rahman](https://discourse.slicer.org/u/Rahman)\
**Replies:** 2\
**Last updated:** [December 3, 2025, 9:23am UTC](https://discourse.slicer.org/t/schengen-visa-for-spain-from-usa/45320 "2025-12-03T09:23:46Z")

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(Boston) Hi, my mentor advised me to attend the Slicer project week in Spain. Is there anyone here that applied for Schengen visa through BLS from USA before? Which visa is applicable for this case: tourist or busines…

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## [Apply presets to certain tissue segment of a volume rendering](https://discourse.slicer.org/t/apply-presets-to-certain-tissue-segment-of-a-volume-rendering/45067)

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**Author:** [@sogo](https://discourse.slicer.org/u/sogo)\
**Replies:** 2\
**Last updated:** [November 13, 2025, 5:01pm UTC](https://discourse.slicer.org/t/apply-presets-to-certain-tissue-segment-of-a-volume-rendering/45067 "2025-11-13T17:01:40Z")

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Hi, I am working on writing a visualization function that applies a different color to a 3D rendering of a volume to only an area masked with tissue segment. I am using split volume function to split segments into scala…

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## [Lookup Table Interpolation](https://discourse.slicer.org/t/lookup-table-interpolation/45226)

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**Author:** [@dpvaldes](https://discourse.slicer.org/u/dpvaldes)\
**Replies:** 0\
**Last updated:** [November 25, 2025, 9:37pm UTC](https://discourse.slicer.org/t/lookup-table-interpolation/45226 "2025-11-25T21:37:11Z")

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I’m generating new Lookup Tables to look at volumes with logarithmic scales. The lookup table I’m creating has a certain number of colors that determine the value resolution in the volumes we are visualizing with this lo…

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## [Wrong positionning of segments exported to files ](https://discourse.slicer.org/t/wrong-positionning-of-segments-exported-to-files/46439)

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**Author:** [@rbg](https://discourse.slicer.org/u/rbg)\
**Replies:** 3\
**Last updated:** [March 16, 2026, 12:38pm UTC](https://discourse.slicer.org/t/wrong-positionning-of-segments-exported-to-files/46439 "2026-03-16T12:38:42Z")

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Hello, I segmented lesions on DICOM using 3DSlicer 5.10.0. The segments were exported to files with the right reference volume, in NIFTI. The problem is that the orientation of the segmentation is not the good one when…

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## [AI-Powered Automatic Segmentation Assistant for 3D Slicer](https://discourse.slicer.org/t/ai-powered-automatic-segmentation-assistant-for-3d-slicer/47860)

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**Author:** [@AIOmarRehan](https://discourse.slicer.org/u/AIOmarRehan)\
**Replies:** 1\
**Last updated:** [August 11, 2026, 3:08pm UTC](https://discourse.slicer.org/t/ai-powered-automatic-segmentation-assistant-for-3d-slicer/47860 "2026-08-11T15:08:02Z")

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Hi everyone, I’m interested in contributing to 3D Slicer by developing an AI-Powered Automatic Segmentation Assistant. The idea is to provide a user-friendly workflow for applying modern AI segmentation models to medic…

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## [Mimics to Slicer Masks and Models - Pre-Tracking Segmentation](https://discourse.slicer.org/t/mimics-to-slicer-masks-and-models-pre-tracking-segmentation/46111)

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**Author:** [@Shilpa\_Rao](https://discourse.slicer.org/u/Shilpa_Rao)\
**Replies:** 1\
**Last updated:** [February 10, 2026, 4:17pm UTC](https://discourse.slicer.org/t/mimics-to-slicer-masks-and-models-pre-tracking-segmentation/46111 "2026-02-10T16:17:36Z")

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I’m trying to repeat segmentation workflows from Mimics to Slicer, with the end-goal being tracking. In Mimics, there is a distinction between masks and models, where models are exported as VRML 2.0 files (then converte…

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## [Computational requirements](https://discourse.slicer.org/t/computational-requirements/48572)

<div class="topic-metadata">

**Author:** [@Bernadett](https://discourse.slicer.org/u/Bernadett)\
**Replies:** 2\
**Last updated:** [October 22, 2026, 8:10pm UTC](https://discourse.slicer.org/t/computational-requirements/48572 "2026-10-22T20:10:55Z")

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Hello, I’m new to the 3D Slicer program. I’d like to seek help with the computational requirements for my project. I’m currently using a computer with the following specifications: 32 GB of installed RAM, iCore ™ i7-970…

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## [On end capping in slicer vs a commercial software ( Treatment Planning System)](https://discourse.slicer.org/t/on-end-capping-in-slicer-vs-a-commercial-software-treatment-planning-system/47118)

<div class="topic-metadata">

**Author:** [@G\_Tom](https://discourse.slicer.org/u/G_Tom)\
**Replies:** 2\
**Last updated:** [May 22, 2026, 10:32pm UTC](https://discourse.slicer.org/t/on-end-capping-in-slicer-vs-a-commercial-software-treatment-planning-system/47118 "2026-05-22T22:32:56Z")

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I have exported a structure which is a simple sphere from Eclipse to slicer via DICOM export/import I noticed some difference at the “end caps” in slicer. I compare the result with a commercial software, Varian Eclipse.…

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## [Talk2View Community sub-topic](https://discourse.slicer.org/t/talk2view-community-sub-topic/47062)

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**Author:** [@benzwick](https://discourse.slicer.org/u/benzwick)\
**Replies:** 2\
**Last updated:** [May 18, 2026, 6:28am UTC](https://discourse.slicer.org/t/talk2view-community-sub-topic/47062 "2026-05-18T06:28:04Z")

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Is there any chance we could make a sub-topic for Talk2View? Talk2View, “the medical viewer you can talk to”, is available as a 3D Slicer Extension or as a 3D Slicer Custom Application. We also have an OHIF version at h…

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## [areas where I can't draw in ct scans](https://discourse.slicer.org/t/areas-where-i-cant-draw-in-ct-scans/46516)

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**Author:** [@RDLmomo](https://discourse.slicer.org/u/RDLmomo)\
**Replies:** 2\
**Last updated:** [March 23, 2026, 10:01am UTC](https://discourse.slicer.org/t/areas-where-i-cant-draw-in-ct-scans/46516 "2026-03-23T10:01:02Z")

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Hi Forum, just wanna ask you if you have any suggestions. Sometimes in specific areas of the CTs in the segmentation, I can’t draw on them, I tried many times to change setting but it’ s like I cannot write them, do you …

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## [How to handle 3D model that was given to me in DICOM format](https://discourse.slicer.org/t/how-to-handle-3d-model-that-was-given-to-me-in-dicom-format/46438)

<div class="topic-metadata">

**Author:** [@madsmess](https://discourse.slicer.org/u/madsmess)\
**Replies:** 2\
**Last updated:** [March 17, 2026, 8:03pm UTC](https://discourse.slicer.org/t/how-to-handle-3d-model-that-was-given-to-me-in-dicom-format/46438 "2026-03-17T20:03:25Z")

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Hi! I was recently given a 3D model from a cardiologist, but it was given to me as a DICOM file. How could I convert/export this model as an STL or other similar format (OBJ, etc.)? I can view it in slicer, although the …

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## [Modul GPA, Interactive 3D Visualization, PCA Visualization Parameters slider](https://discourse.slicer.org/t/modul-gpa-interactive-3d-visualization-pca-visualization-parameters-slider/46149)

<div class="topic-metadata">

**Author:** [@juliangallaun](https://discourse.slicer.org/u/juliangallaun)\
**Replies:** 2\
**Last updated:** [February 15, 2026, 2:27pm UTC](https://discourse.slicer.org/t/modul-gpa-interactive-3d-visualization-pca-visualization-parameters-slider/46149 "2026-02-15T14:27:08Z")

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Hello all, I have a logical question regarding the slider increments and their relation to let’s say my PC1 axis. I did 2D morphometric analysis in other programs (Thin plate spline) and let’s say my sample with highe…

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## [3D-view segmentation smoothing and stl export](https://discourse.slicer.org/t/3d-view-segmentation-smoothing-and-stl-export/46488)

<div class="topic-metadata">

**Author:** [@Eva91](https://discourse.slicer.org/u/Eva91)\
**Replies:** 1\
**Last updated:** [March 18, 2026, 10:50am UTC](https://discourse.slicer.org/t/3d-view-segmentation-smoothing-and-stl-export/46488 "2026-03-18T10:50:46Z")

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Hi, I have a working manual workflow in Slicer, where I load a segmentation, then show it in 3D, and increase the surface smoothness via that tiny arrow on the “Show 3D” button. After that, i export the segmentation to …

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## [2025.11.25 Weekly Meeting](https://discourse.slicer.org/t/2025-11-25-weekly-meeting/45215)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 3\
**Last updated:** [November 25, 2025, 4:43pm UTC](https://discourse.slicer.org/t/2025-11-25-weekly-meeting/45215 "2025-11-25T16:43:55Z")

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Tomorrow, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET. after the project week meetings. We will be re-using the same meeting link Anyone is welcome to join at this link: Launch Meeting - …

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## [RF data streaming from the BK Activ](https://discourse.slicer.org/t/rf-data-streaming-from-the-bk-activ/48025)

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**Author:** [@J.vd.Zee](https://discourse.slicer.org/u/J.vd.Zee)\
**Replies:** 2\
**Last updated:** [August 31, 2026, 7:26pm UTC](https://discourse.slicer.org/t/rf-data-streaming-from-the-bk-activ/48025 "2026-08-31T19:26:01Z")

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We would like to perform research on the raw RF data acquired with a BK Activ ultrasound scanner, with the aim of developing and evaluating methods for improving ultrasound image quality. Could anyone advise us on: whi…

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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)

<div class="topic-metadata">

**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")

</div>

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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## [Can beam hardening artefact be turned into a real looking vessel](https://discourse.slicer.org/t/can-beam-hardening-artefact-be-turned-into-a-real-looking-vessel/46085)

<div class="topic-metadata">

**Author:** [@Vonni3](https://discourse.slicer.org/u/Vonni3)\
**Replies:** 6\
**Last updated:** [February 8, 2026, 8:15pm UTC](https://discourse.slicer.org/t/can-beam-hardening-artefact-be-turned-into-a-real-looking-vessel/46085 "2026-02-08T20:15:01Z")

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Hello I have what looks like connections from Superior Vena Cava to Aorta. They look real, but are they? They have vessel walls and curve.

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## [TotalSegmentator Extension failed to install req. package](https://discourse.slicer.org/t/totalsegmentator-extension-failed-to-install-req-package/47939)

<div class="topic-metadata">

**Author:** [@dumichgh](https://discourse.slicer.org/u/dumichgh)\
**Replies:** 2\
**Last updated:** [August 21, 2026, 1:44pm UTC](https://discourse.slicer.org/t/totalsegmentator-extension-failed-to-install-req-package/47939 "2026-08-21T13:44:25Z")

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Problem report for Slicer 5.6.2 win-amd64: When trying to run a TotalSeg got an “error” and process halted : Failed to install required packages. Command ‘\[‘C:/Users/XXXX/AppData/Local/slicer.org/Slicer 5.6.2/bin/../b…

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## [How can I calculate dose-mass histograms and the impact of lung expansion](https://discourse.slicer.org/t/how-can-i-calculate-dose-mass-histograms-and-the-impact-of-lung-expansion/46997)

<div class="topic-metadata">

**Author:** [@zahra\_Tabasi](https://discourse.slicer.org/u/zahra_Tabasi)\
**Replies:** 2\
**Last updated:** [June 2, 2026, 11:56am UTC](https://discourse.slicer.org/t/how-can-i-calculate-dose-mass-histograms-and-the-impact-of-lung-expansion/46997 "2026-06-02T11:56:56Z")

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Hello everyone, I am currently working on a research project involving unilateral left-sided breast cancer patients undergoing radiotherapy. My study compares Free Breathing (FB) and Deep Inspiration Breath Hold (DIBH) …

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## [Varying between slices](https://discourse.slicer.org/t/varying-between-slices/45798)

<div class="topic-metadata">

**Author:** [@Varsha](https://discourse.slicer.org/u/Varsha)\
**Replies:** 2\
**Last updated:** [January 19, 2026, 4:30pm UTC](https://discourse.slicer.org/t/varying-between-slices/45798 "2026-01-19T16:30:20Z")

</div>

Just to clarify, if I want to move between slices in the axial view, should I just use the slider? Or is there a different way of doing this?

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## [Low Framerate streaming NDI Lyra Transforms in Plus Server](https://discourse.slicer.org/t/low-framerate-streaming-ndi-lyra-transforms-in-plus-server/45434)

<div class="topic-metadata">

**Author:** [@damparm](https://discourse.slicer.org/u/damparm)\
**Replies:** 2\
**Last updated:** [December 11, 2025, 4:19pm UTC](https://discourse.slicer.org/t/low-framerate-streaming-ndi-lyra-transforms-in-plus-server/45434 "2025-12-11T16:19:36Z")

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Hello My project is to track Telemed ultrasound using a recently purchased NDI Polaris Lyra tracker. So far PlusServer connects well with Telemed and the tracker, Images are moving in my Slicer scene. But the refreshme…

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## [Question on Segmentation and Smoothing a Gecko Skull](https://discourse.slicer.org/t/question-on-segmentation-and-smoothing-a-gecko-skull/47990)

<div class="topic-metadata">

**Author:** [@GBurkin](https://discourse.slicer.org/u/GBurkin)\
**Replies:** 2\
**Last updated:** [August 26, 2026, 6:51pm UTC](https://discourse.slicer.org/t/question-on-segmentation-and-smoothing-a-gecko-skull/47990 "2026-08-26T18:51:15Z")

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Hello, I’m working with CT scans of small geckos, and I’m working on segmenting their skulls and full skeletons. I have mostly taught myself how to segment via YouTube and help pages, but most of these are focused on hu…

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## [What is the difference between GetColor() and GetSelectedColor() in display node?](https://discourse.slicer.org/t/what-is-the-difference-between-getcolor-and-getselectedcolor-in-display-node/47613)

<div class="topic-metadata">

**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 2\
**Last updated:** [July 16, 2026, 6:22am UTC](https://discourse.slicer.org/t/what-is-the-difference-between-getcolor-and-getselectedcolor-in-display-node/47613 "2026-07-16T06:22:00Z")

</div>

Hi, The question is, as the title says, what is the difference between the color property and the selected color propertly of a display node? Thanks in advance.

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## [Tractography and anatomical research](https://discourse.slicer.org/t/tractography-and-anatomical-research/46805)

<div class="topic-metadata">

**Author:** [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Replies:** 3\
**Last updated:** [April 27, 2026, 9:27am UTC](https://discourse.slicer.org/t/tractography-and-anatomical-research/46805 "2026-04-27T09:27:46Z")

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Hi, I wonder whether the algorithms used for tractography could be helpful to follow the path of muscle fibres through serial histologic sections

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## [3d slicer and totalsegmentator in mac](https://discourse.slicer.org/t/3d-slicer-and-totalsegmentator-in-mac/46135)

<div class="topic-metadata">

**Author:** [@alex\_He](https://discourse.slicer.org/u/alex_He)\
**Replies:** 1\
**Last updated:** [February 14, 2026, 5:17am UTC](https://discourse.slicer.org/t/3d-slicer-and-totalsegmentator-in-mac/46135 "2026-02-14T05:17:53Z")

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I have installed 3d slicer 5. 10 in mac mini. I also installed laterest totalsegmentator using slicer extension. But when I apply the error message torch not found occur. Is there something I should take note when using …

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## [Pencil tool not visible on some slices, but works in 3D view](https://discourse.slicer.org/t/pencil-tool-not-visible-on-some-slices-but-works-in-3d-view/46908)

<div class="topic-metadata">

**Author:** [@Alexander\_Schirkow](https://discourse.slicer.org/u/Alexander_Schirkow)\
**Replies:** 2\
**Last updated:** [May 5, 2026, 3:16am UTC](https://discourse.slicer.org/t/pencil-tool-not-visible-on-some-slices-but-works-in-3d-view/46908 "2026-05-05T03:16:25Z")

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Hello, I encountered an issue when using the Pencil tool in Segment Editor. On some slices and with certain datasets, the pencil strokes are not visible in the 2D views (axial/sagittal/coronal). However, in the 3D view …

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## [Regarding radius of centerline curve](https://discourse.slicer.org/t/regarding-radius-of-centerline-curve/46113)

<div class="topic-metadata">

**Author:** [@Mudrika](https://discourse.slicer.org/u/Mudrika)\
**Replies:** 2\
**Last updated:** [February 11, 2026, 12:09pm UTC](https://discourse.slicer.org/t/regarding-radius-of-centerline-curve/46113 "2026-02-11T12:09:24Z")

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Hello everyone! I am extracting centerline curves from a 3D model of coronary arteries and further through centerline quantiifcation, radius of the arteries is calculated. Can someone please tell, is it the average radi…

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## [Beginner to Slicer, SOFA, etc - Advice?](https://discourse.slicer.org/t/beginner-to-slicer-sofa-etc-advice/47469)

<div class="topic-metadata">

**Author:** [@KarimA](https://discourse.slicer.org/u/KarimA)\
**Replies:** 1\
**Last updated:** [June 27, 2026, 12:49pm UTC](https://discourse.slicer.org/t/beginner-to-slicer-sofa-etc-advice/47469 "2026-06-27T12:49:38Z")

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Hello everyone, I’m a computer engineering undergrad (senior) new to 3DSlicer and related medical software. I have recently become interested in surgical robotics and have been working on a few research projects regardi…

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## [Please help me. I've tried everything i known](https://discourse.slicer.org/t/please-help-me-ive-tried-everything-i-known/46702)

<div class="topic-metadata">

**Author:** [@Tech-Liuxy](https://discourse.slicer.org/u/Tech-Liuxy)\
**Replies:** 1\
**Last updated:** [April 10, 2026, 1:08am UTC](https://discourse.slicer.org/t/please-help-me-ive-tried-everything-i-known/46702 "2026-04-10T01:08:10Z")

</div>

\##MAC TAHOE26 Processing started Writing input file to /private/var/folders/c2/7ytv4ycx59z72y4bcl8dfplh0000gn/T/Slicer-liuxy/\_\_SlicerTemp\_\_2026-04-09\_14+44+48.430/total-segmentator-input.nii Creating segmentations wit…

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## [Freelance Opportunity – 3D Slicer Expert for Dental CBCT Annotation Project](https://discourse.slicer.org/t/freelance-opportunity-3d-slicer-expert-for-dental-cbct-annotation-project/47704)

<div class="topic-metadata">

**Author:** [@Visio](https://discourse.slicer.org/u/Visio)\
**Replies:** 0\
**Last updated:** [July 21, 2026, 2:38pm UTC](https://discourse.slicer.org/t/freelance-opportunity-3d-slicer-expert-for-dental-cbct-annotation-project/47704 "2026-07-21T14:38:07Z")

</div>

Freelance Opportunity – 3D Slicer Expert for Dental CBCT Annotation Project We are looking for an experienced freelancer with hands-on knowledge of 3D Slicer and DICOM/CBCT imaging to support a research project in denta…

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## [Surface semilandmarking: accounting for landmark asymmetry?](https://discourse.slicer.org/t/surface-semilandmarking-accounting-for-landmark-asymmetry/46210)

<div class="topic-metadata">

**Author:** [@raranda22](https://discourse.slicer.org/u/raranda22)\
**Replies:** 3\
**Last updated:** [February 19, 2026, 4:55am UTC](https://discourse.slicer.org/t/surface-semilandmarking-accounting-for-landmark-asymmetry/46210 "2026-02-19T04:55:09Z")

</div>

Hello, I’ve been using various surface semilandmarking techniques (DeCAL, auto3dgm, Builder (part of ATLAS), PseudoLMGenerator) to landmark bird beak meshes from MarkMyBird. The only landmarking module I’m aware of that…

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