# Latest

**URL:** https://discourse.slicer.org/latest.md?page=39

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

**Page:** 40

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## [How to handle errors reported by plugin Lung CT Segmenter？](https://discourse.slicer.org/t/how-to-handle-errors-reported-by-plugin-lung-ct-segmenter/44507)

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**Author:** [@Esther](https://discourse.slicer.org/u/Esther)\
**Replies:** 0\
**Last updated:** [September 17, 2025, 2:11pm UTC](https://discourse.slicer.org/t/how-to-handle-errors-reported-by-plugin-lung-ct-segmenter/44507 "2025-09-17T14:11:59Z")

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Hey guys, I’d like to ask how to handle this error？

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## [I can't find any extensions in the latest version of 3D slicer](https://discourse.slicer.org/t/i-cant-find-any-extensions-in-the-latest-version-of-3d-slicer/44491)

<div class="topic-metadata">

**Author:** [@researchtomliu](https://discourse.slicer.org/u/researchtomliu)\
**Replies:** 5\
**Last updated:** [September 17, 2025, 1:33am UTC](https://discourse.slicer.org/t/i-cant-find-any-extensions-in-the-latest-version-of-3d-slicer/44491 "2025-09-17T01:33:21Z")

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Today, I’ve downloaded the latest version of 3D Slicer (5.9.0-2025-09-14). When I installed it, I couldn’t find any extensions in the “Extension Manager”. How can I solve this issue? Thanks a lot.

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## [Identifying problematic landmarks in large landmark dataset](https://discourse.slicer.org/t/identifying-problematic-landmarks-in-large-landmark-dataset/44498)

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**Author:** [@christyhipsley](https://discourse.slicer.org/u/christyhipsley)\
**Replies:** 1\
**Last updated:** [September 16, 2025, 4:13pm UTC](https://discourse.slicer.org/t/identifying-problematic-landmarks-in-large-landmark-dataset/44498 "2025-09-16T16:13:13Z")

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I’m seeking advice on how to identify potentially problematic landmarks in a large (1531 landmarks on 101 specimens) dataset, where I suspect some landmarks may have fallen through the surface of the 3D objects. The land…

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## [2025.09.16 Weekly Meeting](https://discourse.slicer.org/t/2025-09-16-weekly-meeting/44488)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 1\
**Last updated:** [September 16, 2025, 1:59pm UTC](https://discourse.slicer.org/t/2025-09-16-weekly-meeting/44488 "2025-09-16T13:59:43Z")

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Tomorrow, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. a Anyone is welcome to join at this link: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread t…

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## [Visible segment in 3D may have a None representation name](https://discourse.slicer.org/t/visible-segment-in-3d-may-have-a-none-representation-name/44475)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 4\
**Last updated:** [September 16, 2025, 1:38pm UTC](https://discourse.slicer.org/t/visible-segment-in-3d-may-have-a-none-representation-name/44475 "2025-09-16T13:38:02Z")

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Please consider these steps: add a volume in a new scene in the segment editor, paint anything in a slice view in the python console seg = getNode("Segmentation") seg.GetDisplayNode().GetPreferredDisplayRepresentation…

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## [Segment paint did not remain. just disappear](https://discourse.slicer.org/t/segment-paint-did-not-remain-just-disappear/44497)

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**Author:** [@omfs\_snudh](https://discourse.slicer.org/u/omfs_snudh)\
**Replies:** 0\
**Last updated:** [September 16, 2025, 12:50pm UTC](https://discourse.slicer.org/t/segment-paint-did-not-remain-just-disappear/44497 "2025-09-16T12:50:03Z")

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Operating system: Window Slicer version: 5.81 I just used segment editor based on my DICOM files. But, segment paint has disappeared right after when I touch. I checked “everwhere” and unchecked “intensity range”…

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## [Measuring an irregular 3D image surface area](https://discourse.slicer.org/t/measuring-an-irregular-3d-image-surface-area/44487)

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**Author:** [@highlook](https://discourse.slicer.org/u/highlook)\
**Replies:** 3\
**Last updated:** [September 16, 2025, 12:11pm UTC](https://discourse.slicer.org/t/measuring-an-irregular-3d-image-surface-area/44487 "2025-09-16T12:11:53Z")

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Hello everyone. After segmenting brain tumors from contrast-enhanced brain MRI images using the BrainLab application, I can export the resulting 3D tumor image as a DICOM file. My goal is to calculate the surface area of…

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## [qMRMLNodeComboBox doesn't work](https://discourse.slicer.org/t/qmrmlnodecombobox-doesnt-work/20916)

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**Author:** [@476663616](https://discourse.slicer.org/u/476663616)\
**Replies:** 5\
**Last updated:** [September 16, 2025, 8:47am UTC](https://discourse.slicer.org/t/qmrmlnodecombobox-doesnt-work/20916 "2025-09-16T08:47:20Z")

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Hello everyone, I’m trying to add a new qMRMLNodeComboBox in my extension. However it seems doesn’t work. Like this: In the .ui file, \<widget class="qMRMLNodeComboBox" name="SeedsNodeSelector"\> \<property name…

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## [Use of 3D slicer for creating surface meshes of wood from micro tomograph imagery](https://discourse.slicer.org/t/use-of-3d-slicer-for-creating-surface-meshes-of-wood-from-micro-tomograph-imagery/44361)

<div class="topic-metadata">

**Author:** [@franco\_otaola](https://discourse.slicer.org/u/franco_otaola)\
**Replies:** 6\
**Last updated:** [September 15, 2025, 2:57pm UTC](https://discourse.slicer.org/t/use-of-3d-slicer-for-creating-surface-meshes-of-wood-from-micro-tomograph-imagery/44361 "2025-09-15T14:57:01Z")

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Hello, I am not a current user of slicer3D but I am looking for a software to transform the output of a college doing microtomograph to, ideally a surface mesh of different sections of a scan of wood. the scans are gen…

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## [create a scripted segment editor effect by extension wizard  ](https://discourse.slicer.org/t/create-a-scripted-segment-editor-effect-by-extension-wizard/44409)

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**Author:** [@LeonHaoWI](https://discourse.slicer.org/u/LeonHaoWI)\
**Replies:** 4\
**Last updated:** [September 15, 2025, 2:18pm UTC](https://discourse.slicer.org/t/create-a-scripted-segment-editor-effect-by-extension-wizard/44409 "2025-09-15T14:18:07Z")

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I’m new to slicer development, try to create a scripted module base on segment editor effect, I’m using 5.9 version, and try to create a skeleton by using extension wizard, no information is shown in error log window, b…

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## [2025.09.09 Weekly Meeting](https://discourse.slicer.org/t/2025-09-09-weekly-meeting/44411)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 1\
**Last updated:** [September 15, 2025, 10:51am UTC](https://discourse.slicer.org/t/2025-09-09-weekly-meeting/44411 "2025-09-15T10:51:48Z")

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Today, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. a Anyone is welcome to join at this link: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread to p…

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## [Automated Atlas Alignment](https://discourse.slicer.org/t/automated-atlas-alignment/44476)

<div class="topic-metadata">

**Author:** [@diseaseprogression](https://discourse.slicer.org/u/diseaseprogression)\
**Replies:** 1\
**Last updated:** [September 15, 2025, 5:06am UTC](https://discourse.slicer.org/t/automated-atlas-alignment/44476 "2025-09-15T05:06:09Z")

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Hi everyone, I am trying to use the OpenAnatomy Atlas extension on Slicer with various MRI scans but am struggling with aligning the atlas with the scans. For some scans, it is automatically aligned, but for others they …

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## [DBS electrode reconstruction](https://discourse.slicer.org/t/dbs-electrode-reconstruction/1872)

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**Author:** [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Replies:** 9\
**Last updated:** [September 14, 2025, 7:48am UTC](https://discourse.slicer.org/t/dbs-electrode-reconstruction/1872 "2025-09-14T07:48:56Z")

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## [TotalSegmentator No Output](https://discourse.slicer.org/t/totalsegmentator-no-output/44433)

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**Author:** [@aceegreene](https://discourse.slicer.org/u/aceegreene)\
**Replies:** 7\
**Last updated:** [September 13, 2025, 7:29pm UTC](https://discourse.slicer.org/t/totalsegmentator-no-output/44433 "2025-09-13T19:29:25Z")

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Hi everyone - I am trying to use totalsegmentator to segment an MRI image I have and seem to not be getting any results. There seem to be no errors in the module itself or in the Python console but once the processing i…

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## [Detecting which segments have been modified](https://discourse.slicer.org/t/detecting-which-segments-have-been-modified/44453)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 10\
**Last updated:** [September 13, 2025, 2:14am UTC](https://discourse.slicer.org/t/detecting-which-segments-have-been-modified/44453 "2025-09-13T02:14:53Z")

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I’m observing vtkSegmentation.SourceRepresentationModified and in the callback method I want to figure out which of the segments have been modified. Does anyone know a good way to do this? I tried checking the MTimes o…

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## [Help With App development](https://discourse.slicer.org/t/help-with-app-development/44449)

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**Author:** [@acdike](https://discourse.slicer.org/u/acdike)\
**Replies:** 1\
**Last updated:** [September 12, 2025, 9:22pm UTC](https://discourse.slicer.org/t/help-with-app-development/44449 "2025-09-12T21:22:51Z")

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I am new to 3D slicer app, but I am looking for someone to write a simple script that can automate the calculation of Volume and Surface area of a 3D Mesh, without deploying the entire 3D Slicer application.

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## [Mirroring landmarks prior to GPA](https://discourse.slicer.org/t/mirroring-landmarks-prior-to-gpa/44457)

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**Author:** [@macorreia42](https://discourse.slicer.org/u/macorreia42)\
**Replies:** 2\
**Last updated:** [September 12, 2025, 2:57pm UTC](https://discourse.slicer.org/t/mirroring-landmarks-prior-to-gpa/44457 "2025-09-12T14:57:56Z")

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Dear Support, I have a number of incomplete mandibles on which I have placed landmarks prior to GM analyses. For each one, I only placed landmarks on the most complete side, so some .mrk.json have landmarks on a left ma…

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## [Slicer Morph GPA | Interactive 3D vizualization | Cannot warp around PCs](https://discourse.slicer.org/t/slicer-morph-gpa-interactive-3d-vizualization-cannot-warp-around-pcs/44416)

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**Author:** [@macorreia42](https://discourse.slicer.org/u/macorreia42)\
**Replies:** 7\
**Last updated:** [September 12, 2025, 10:54am UTC](https://discourse.slicer.org/t/slicer-morph-gpa-interactive-3d-vizualization-cannot-warp-around-pcs/44416 "2025-09-12T10:54:07Z")

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Operating system: Windows 11 Home Slicer version: 5.8.1 r33241 / 11eaf62 Expected behavior: reference model warps around PCs Actual behavior: Critical error TypeError: unsupported operand type(s) for -: ‘str’ and ‘int…

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## [Slicer build up fail](https://discourse.slicer.org/t/slicer-build-up-fail/44256)

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**Author:** [@akuan1997](https://discourse.slicer.org/u/akuan1997)\
**Replies:** 4\
**Last updated:** [September 12, 2025, 12:26am UTC](https://discourse.slicer.org/t/slicer-build-up-fail/44256 "2025-09-12T00:26:30Z")

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I was trying to build up Slicer by using source code from github. I followed the instructions from here: Windows — 3D Slicer documentation I also checked with the Install Prerequisites Cmake: cmake version 3.28.6 Git…

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## [How to perform myocardial segmentation based on AHA 17-segment](https://discourse.slicer.org/t/how-to-perform-myocardial-segmentation-based-on-aha-17-segment/44446)

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**Author:** [@zhaoshihai](https://discourse.slicer.org/u/zhaoshihai)\
**Replies:** 0\
**Last updated:** [September 11, 2025, 2:10pm UTC](https://discourse.slicer.org/t/how-to-perform-myocardial-segmentation-based-on-aha-17-segment/44446 "2025-09-11T14:10:40Z")

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Hi everyone, I’m trying to calculate cardiac ADC values using 3D Slicer (v5.8.1), both globally and based on the AHA 17-segment model. However, I’m unsure how to perform myocardial segmentation. I’ve installed the Slice…

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## [New extension: ModalityConverter - bringing AI medical image-to-image translation to 3D Slicer](https://discourse.slicer.org/t/new-extension-modalityconverter-bringing-ai-medical-image-to-image-translation-to-3d-slicer/44405)

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**Author:** [@ciro.raggio](https://discourse.slicer.org/u/ciro.raggio)\
**Replies:** 9\
**Last updated:** [September 11, 2025, 1:12pm UTC](https://discourse.slicer.org/t/new-extension-modalityconverter-bringing-ai-medical-image-to-image-translation-to-3d-slicer/44405 "2025-09-11T13:12:28Z")

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ModalityConverter is officially available in the 3D Slicer Extensions Index, under the Image Synthesis category (from version 5.9.0)! The extension makes medical image-to-image translation AI models freely and easily ac…

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## [Change transform display spacing less than 1 mm](https://discourse.slicer.org/t/change-transform-display-spacing-less-than-1-mm/44440)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 3\
**Last updated:** [September 10, 2025, 10:25pm UTC](https://discourse.slicer.org/t/change-transform-display-spacing-less-than-1-mm/44440 "2025-09-10T22:25:37Z")

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Hi, I applied a transform to a small rodent volume, but the various arrow and grid options seem far too large for visualizing the transform. The key seems to be lowering the “spacing” under the “advanced” menu, but it …

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## [Avoid markup's control point interaction with model](https://discourse.slicer.org/t/avoid-markups-control-point-interaction-with-model/44438)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 0\
**Last updated:** [September 10, 2025, 9:02pm UTC](https://discourse.slicer.org/t/avoid-markups-control-point-interaction-with-model/44438 "2025-09-10T21:02:22Z")

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Hi, I have 2 models on the scene, one is near and one is far from the camera, the nearModel is occluding part of the farModel. I also have a markupsPointList. I want my markup points to “not see” the nearModel while I m…

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## [Markups control Points 2D Views projections on Reformat Mode](https://discourse.slicer.org/t/markups-control-points-2d-views-projections-on-reformat-mode/44401)

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**Author:** [@sarafv](https://discourse.slicer.org/u/sarafv)\
**Replies:** 1\
**Last updated:** [September 10, 2025, 2:41pm UTC](https://discourse.slicer.org/t/markups-control-points-2d-views-projections-on-reformat-mode/44401 "2025-09-10T14:41:22Z")

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Hello, Following and correcting previous topic about hiding projections of control points, I’v juste realize that the problem with displayNode.SetSliceProjection happens only when 2D views are on Reformat Mode, the pro…

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## [Creating macOS Installer for Custom Slicer App](https://discourse.slicer.org/t/creating-macos-installer-for-custom-slicer-app/44432)

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**Author:** [@software](https://discourse.slicer.org/u/software)\
**Replies:** 0\
**Last updated:** [September 10, 2025, 2:00pm UTC](https://discourse.slicer.org/t/creating-macos-installer-for-custom-slicer-app/44432 "2025-09-10T14:00:00Z")

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I have built and packaged my custom Slicer application on a Windows machine using Visual Studio. Now I want to create a macOS installer for the same custom application. Is it possible to generate a macOS package directl…

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## [Sandbox extension and Slicer version 5.8.1](https://discourse.slicer.org/t/sandbox-extension-and-slicer-version-5-8-1/44410)

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**Author:** [@patpaul](https://discourse.slicer.org/u/patpaul)\
**Replies:** 2\
**Last updated:** [September 10, 2025, 7:33am UTC](https://discourse.slicer.org/t/sandbox-extension-and-slicer-version-5-8-1/44410 "2025-09-10T07:33:54Z")

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Hi all, a little new to slicer. I am trying to create a plane using my three point fiducial list but slicer version 5.8.1 doesn’t have the feature. I installed sandbox and slicerigt extension but I can’t find it in the s…

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## [Request for Academic License – “Appendicular Bones” TotalSegmentator Module](https://discourse.slicer.org/t/request-for-academic-license-appendicular-bones-totalsegmentator-module/44086)

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**Author:** [@JuanCarlos](https://discourse.slicer.org/u/JuanCarlos)\
**Replies:** 2\
**Last updated:** [September 9, 2025, 5:31pm UTC](https://discourse.slicer.org/t/request-for-academic-license-appendicular-bones-totalsegmentator-module/44086 "2025-09-09T17:31:41Z")

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Dear 3D Slicer Community, My name is Juan Carlos Conesa Gallego and I am currently completing my Bachelor’s Thesis in Biomedical Engineering at the Polytechnic University of Cartagena (UPCT), Spain. The project is title…

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## [Lung CT Analyzer is not showing extended analysis results](https://discourse.slicer.org/t/lung-ct-analyzer-is-not-showing-extended-analysis-results/42010)

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**Author:** [@LukasR](https://discourse.slicer.org/u/LukasR)\
**Replies:** 5\
**Last updated:** [September 9, 2025, 4:17pm UTC](https://discourse.slicer.org/t/lung-ct-analyzer-is-not-showing-extended-analysis-results/42010 "2025-09-09T16:17:21Z")

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Hello, while using the extension Lung CT Analyzer I came across one problem. After I select “compute results” It’s not showing Lung CT analysis extended results neither in 3D Slicer nor PDF report. There are just zeros.…

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## [PlaceLandmarkGrid doesn't produce the grid](https://discourse.slicer.org/t/placelandmarkgrid-doesnt-produce-the-grid/44396)

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**Author:** [@kuoi](https://discourse.slicer.org/u/kuoi)\
**Replies:** 18\
**Last updated:** [September 9, 2025, 2:47pm UTC](https://discourse.slicer.org/t/placelandmarkgrid-doesnt-produce-the-grid/44396 "2025-09-09T14:47:58Z")

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Hello I am using PlaceLandmarkGrid in Slicer Morph on Linux, version c944db9 (2025-06-26) I tried to generate semi-landmarks on a grid from existing points, but instead of obtaining a grid containing the semi-landmar…

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## [SlicerMorph CreateSemiLMPatches gaps between 2 triangle regions](https://discourse.slicer.org/t/slicermorph-createsemilmpatches-gaps-between-2-triangle-regions/44407)

<div class="topic-metadata">

**Author:** [@kuoi](https://discourse.slicer.org/u/kuoi)\
**Replies:** 1\
**Last updated:** [September 9, 2025, 2:41pm UTC](https://discourse.slicer.org/t/slicermorph-createsemilmpatches-gaps-between-2-triangle-regions/44407 "2025-09-09T14:41:43Z")

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Hello, I am new to 3D Slicer and SlicerMorph. I want to use the CreateSemiLMPatches module in the SlicerMorph extension to map semi-landmarks on a surface. However, after following tutorial 1 and tutorial 2, I still cann…

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