# Latest

**URL:** https://discourse.slicer.org/latest.md?page=50

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

**Page:** 51

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## [Help with Landmark placement: Not actually placed on PLY surface](https://discourse.slicer.org/t/help-with-landmark-placement-not-actually-placed-on-ply-surface/43492)

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**Author:** [@jsguerra](https://discourse.slicer.org/u/jsguerra)\
**Replies:** 9\
**Last updated:** [June 26, 2025, 3:54pm UTC](https://discourse.slicer.org/t/help-with-landmark-placement-not-actually-placed-on-ply-surface/43492 "2025-06-26T15:54:20Z")

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Hello! I was placing some landmarks on a PLY surface and noticed that when I place/reposition a landmark to my desired position (Fig. 2), the landmark is not actually touching the model surface (Fig. 2). Is this normal o…

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## [Segmentation problem on a transformed volume](https://discourse.slicer.org/t/segmentation-problem-on-a-transformed-volume/43502)

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**Author:** [@SegmenterSam](https://discourse.slicer.org/u/SegmenterSam)\
**Replies:** 0\
**Last updated:** [June 26, 2025, 2:28pm UTC](https://discourse.slicer.org/t/segmentation-problem-on-a-transformed-volume/43502 "2025-06-26T14:28:22Z")

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Hi all, This rCBV map has been transformed to fit over another volume. However, is seems that the editable area that allows segmentation has not moved along with it. How do I adjust this area so that I can segment areas…

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## [Red Boundary/Border Around Frame in Version 5.8.1](https://discourse.slicer.org/t/red-boundary-border-around-frame-in-version-5-8-1/43285)

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**Author:** [@rcpr](https://discourse.slicer.org/u/rcpr)\
**Replies:** 5\
**Last updated:** [June 26, 2025, 2:25pm UTC](https://discourse.slicer.org/t/red-boundary-border-around-frame-in-version-5-8-1/43285 "2025-06-26T14:25:04Z")

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I’m using Slicer to acquire and record sequences in real-time via the PLUS server. I’ve recently started using version 5.8.1, and I’ve noticed a red boundary appearing around the acquired sequence. My issue is that even…

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## [GeoSlicer on HPC](https://discourse.slicer.org/t/geoslicer-on-hpc/43316)

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**Author:** [@Lucas\_Givord](https://discourse.slicer.org/u/Lucas_Givord)\
**Replies:** 3\
**Last updated:** [June 26, 2025, 2:13pm UTC](https://discourse.slicer.org/t/geoslicer-on-hpc/43316 "2025-06-26T14:13:35Z")

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Hello everyone, I saw this post discourse about a slicer based app focused on geological use case : GeoSlicer open source release. From what I read on Github, this application seems also to target HPC. AFAIK Slicer doe…

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## [Extension manager causing freeze](https://discourse.slicer.org/t/extension-manager-causing-freeze/43499)

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**Author:** [@Woolfian](https://discourse.slicer.org/u/Woolfian)\
**Replies:** 1\
**Last updated:** [June 26, 2025, 10:49am UTC](https://discourse.slicer.org/t/extension-manager-causing-freeze/43499 "2025-06-26T10:49:39Z")

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Hi there, I have an issue with a fresh install of Slicer 5.8.1 on a PC running Windows 10 Enterprise. After install, I opened the extension manager once to successfully install one module (SurfaceWrapSolidify). Every ti…

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## [Access to Main.cxx from custom Slicer Python application](https://discourse.slicer.org/t/access-to-main-cxx-from-custom-slicer-python-application/43495)

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**Author:** [@ejm-revvity](https://discourse.slicer.org/u/ejm-revvity)\
**Replies:** 0\
**Last updated:** [June 25, 2025, 11:09pm UTC](https://discourse.slicer.org/t/access-to-main-cxx-from-custom-slicer-python-application/43495 "2025-06-25T23:09:48Z")

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This is a cross-post from Kitware discourse topic. Essentially, I’m interested in understanding to what I have access in Main.cxx (Qt, etc.) and how I would reference, from the custom Python application, something I hav…

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## [Slicer frozen when loading large MR volume (\>1GB)](https://discourse.slicer.org/t/slicer-frozen-when-loading-large-mr-volume-1gb/43483)

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**Author:** [@joved81744](https://discourse.slicer.org/u/joved81744)\
**Replies:** 1\
**Last updated:** [June 25, 2025, 4:23pm UTC](https://discourse.slicer.org/t/slicer-frozen-when-loading-large-mr-volume-1gb/43483 "2025-06-25T16:23:15Z")

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Hey guys… :waving\_hand: Slicer (v5.2.2) crashes or freezes when I load a large MR volume (1.2 GB NIfTI). The progress bar gets stuck at ~30 %, and no console errors appear. Restarting works, but fails again on the same …

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## [Transformation matrix in B spline Deformable registration module](https://discourse.slicer.org/t/transformation-matrix-in-b-spline-deformable-registration-module/43488)

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**Author:** [@azam](https://discourse.slicer.org/u/azam)\
**Replies:** 0\
**Last updated:** [June 25, 2025, 1:34pm UTC](https://discourse.slicer.org/t/transformation-matrix-in-b-spline-deformable-registration-module/43488 "2025-06-25T13:34:19Z")

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Hi everyone I have two DICOM CT images (CT1, CT2) (Matrix size: 512,512,111) that I want to register them with B spline deformable registration module. I have also exported a RT dose file (RT2) (Matrix size:100,61,1) …

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## [Manual Brain Tumor Segmentation – Dice Score 1.0 – Study Kit for Learners (3D Slicer Project Included)](https://discourse.slicer.org/t/manual-brain-tumor-segmentation-dice-score-1-0-study-kit-for-learners-3d-slicer-project-included/43482)

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**Author:** [@Drnoor\_fatima](https://discourse.slicer.org/u/Drnoor_fatima)\
**Replies:** 0\
**Last updated:** [June 25, 2025, 1:17pm UTC](https://discourse.slicer.org/t/manual-brain-tumor-segmentation-dice-score-1-0-study-kit-for-learners-3d-slicer-project-included/43482 "2025-06-25T13:17:07Z")

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Hi everyone, I recently completed a manual segmentation of a brain tumor from the BraTS dataset using 3D Slicer (12+ hours of refinement and validation). I used: • Thresholding • Level tracing • Smoothing (to anatomi…

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## [Is it possible to edit the ImageOrientationPatient DICOM tag in slicer?](https://discourse.slicer.org/t/is-it-possible-to-edit-the-imageorientationpatient-dicom-tag-in-slicer/2648)

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**Author:** [@Lowey](https://discourse.slicer.org/u/Lowey)\
**Replies:** 6\
**Last updated:** [June 25, 2025, 8:01am UTC](https://discourse.slicer.org/t/is-it-possible-to-edit-the-imageorientationpatient-dicom-tag-in-slicer/2648 "2025-06-25T08:01:21Z")

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Hi, I am hoping it is possible to edit the ImageOrientationPatient DICOM tag and associated image within Slicer. My problem, I have a CT image which has been transformed with 6 degrees of freedom (3 Translations and 3…

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## [Problems with alpaca ](https://discourse.slicer.org/t/problems-with-alpaca/43461)

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**Author:** [@aventador17](https://discourse.slicer.org/u/aventador17)\
**Replies:** 6\
**Last updated:** [June 25, 2025, 1:35am UTC](https://discourse.slicer.org/t/problems-with-alpaca/43461 "2025-06-25T01:35:49Z")

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Hello, this is my first time using 3d slicer. I write to community 'cause I have had some problem with ALPACA, it does not run . The phyton console showes this: In the future np.bool will be defined as the correspondin…

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## [Logo and Stickers](https://discourse.slicer.org/t/logo-and-stickers/43443)

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**Author:** [@Esteban\_Barreiro](https://discourse.slicer.org/u/Esteban_Barreiro)\
**Replies:** 2\
**Last updated:** [June 24, 2025, 6:46pm UTC](https://discourse.slicer.org/t/logo-and-stickers/43443 "2025-06-24T18:46:37Z")

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Hi! Is there any link to download 3dSlicer’s logos and stickers to put them on posters or academic presentations?

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## [Imaging of the pulp chamber with CBCT](https://discourse.slicer.org/t/imaging-of-the-pulp-chamber-with-cbct/43460)

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**Author:** [@BDab1212](https://discourse.slicer.org/u/BDab1212)\
**Replies:** 0\
**Last updated:** [June 23, 2025, 5:13pm UTC](https://discourse.slicer.org/t/imaging-of-the-pulp-chamber-with-cbct/43460 "2025-06-23T17:13:06Z")

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Hey guys, I recently startet using slicer 3D and have the task of do measurements of the pulp chamber in a study model (in vitro model with extracted canines). Does anyone have experiences of marking and measuring the …

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## [Evolutionary S-rep fitting](https://discourse.slicer.org/t/evolutionary-s-rep-fitting/43075)

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**Author:** [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Replies:** 4\
**Last updated:** [June 23, 2025, 3:30pm UTC](https://discourse.slicer.org/t/evolutionary-s-rep-fitting/43075 "2025-06-23T15:30:00Z")

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Is it possible to batch this with a csv file? Or does it need to be done in python?

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## [Breakout Sessions for PW43](https://discourse.slicer.org/t/breakout-sessions-for-pw43/43209)

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**Author:** [@drouin-simon](https://discourse.slicer.org/u/drouin-simon)\
**Replies:** 6\
**Last updated:** [June 23, 2025, 1:46pm UTC](https://discourse.slicer.org/t/breakout-sessions-for-pw43/43209 "2025-06-23T13:46:43Z")

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Hello Project Week attendees, In the next PW43 preparation meeting (Tuesday, June 10), in addition to the discussion about new projects, we will create a tentative schedule for breakout sessions. Until then, please repl…

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## [Problem About Bone Microstructural Analysis on a  MicroCt Data](https://discourse.slicer.org/t/problem-about-bone-microstructural-analysis-on-a-microct-data/43317)

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**Author:** [@TAHA\_KOSE](https://discourse.slicer.org/u/TAHA_KOSE)\
**Replies:** 4\
**Last updated:** [June 23, 2025, 12:32pm UTC](https://discourse.slicer.org/t/problem-about-bone-microstructural-analysis-on-a-microct-data/43317 "2025-06-23T12:32:51Z")

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I am trying to perform trabecular separation, trabecular thickness, trabecular number and bone volume/tissue volume analyses on an irregularly shaped segmented area on the microct dataset. While I am getting normal value…

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## [HoloLens get stuck on "Receiving..." when connecting to SlicerVirtualReality](https://discourse.slicer.org/t/hololens-get-stuck-on-receiving-when-connecting-to-slicervirtualreality/37571)

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**Author:** [@Beatriz\_2](https://discourse.slicer.org/u/Beatriz_2)\
**Replies:** 2\
**Last updated:** [June 23, 2025, 10:49am UTC](https://discourse.slicer.org/t/hololens-get-stuck-on-receiving-when-connecting-to-slicervirtualreality/37571 "2025-06-23T10:49:17Z")

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Operating system: Windows 11 on pc Hi. I tried to connect HoloLens 2 to SlicerVirtualReality. For that purpose I follow the steps in the github. However when I try the first step - set up Windows Mixed Reality - I have…

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## [This is about extension to upload to extension manager](https://discourse.slicer.org/t/this-is-about-extension-to-upload-to-extension-manager/43435)

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**Author:** [@Pranav\_Rai](https://discourse.slicer.org/u/Pranav_Rai)\
**Replies:** 2\
**Last updated:** [June 23, 2025, 10:04am UTC](https://discourse.slicer.org/t/this-is-about-extension-to-upload-to-extension-manager/43435 "2025-06-23T10:04:12Z")

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I am trying to create extensions for my custom slicer application by running the command given in the docs. Still, after running it and setting everything in place, the final folder comes empty every time, and the soluti…

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## [Wondering if the development team will make software development based on the ipad's os system](https://discourse.slicer.org/t/wondering-if-the-development-team-will-make-software-development-based-on-the-ipads-os-system/31217)

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**Author:** [@YuanChaw](https://discourse.slicer.org/u/YuanChaw)\
**Replies:** 2\
**Last updated:** [August 18, 2023, 11:58am UTC](https://discourse.slicer.org/t/wondering-if-the-development-team-will-make-software-development-based-on-the-ipads-os-system/31217 "2023-08-18T11:58:37Z")

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Wondering if the development team will make software development based on the iPad’s OS system, I think it must be super cool and convenient. In that case, we can segment organs by using an iPad pencil. Thanks, Yuan

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## [5070ti could not be recognized in slicer 5.8.1](https://discourse.slicer.org/t/5070ti-could-not-be-recognized-in-slicer-5-8-1/43436)

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**Author:** [@reka\_wolf](https://discourse.slicer.org/u/reka_wolf)\
**Replies:** 3\
**Last updated:** [June 22, 2025, 2:34pm UTC](https://discourse.slicer.org/t/5070ti-could-not-be-recognized-in-slicer-5-8-1/43436 "2025-06-22T14:34:06Z")

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5070ti could not be recognized in slicer 5.8.1. The newest cuda 12.8 is only for 50series, but it could not be supported in slicer 5.8.1 which cuda version is 12.6. Please help

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## [Segment middle & inner ear](https://discourse.slicer.org/t/segment-middle-inner-ear/43447)

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**Author:** [@Nadine\_Nabil](https://discourse.slicer.org/u/Nadine_Nabil)\
**Replies:** 4\
**Last updated:** [June 21, 2025, 5:17pm UTC](https://discourse.slicer.org/t/segment-middle-inner-ear/43447 "2025-06-21T17:17:24Z")

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Hi everyone, I’m trying to segment the middle and inner ear in high anatomical detail using 3D Slicer. I need to extract small structures like: Any advice or workflows for segmenting these fine structures? Should I…

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## [Feedback on Slicer Sticker design](https://discourse.slicer.org/t/feedback-on-slicer-sticker-design/6395)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 17\
**Last updated:** [June 21, 2025, 4:50pm UTC](https://discourse.slicer.org/t/feedback-on-slicer-sticker-design/6395 "2025-06-21T16:50:15Z")

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Hi, To follow up on the last discussion about the sticker, we settle on the text Discover with 3D Slicer (thanks for the suggestion @lassoan). Note: The purple border is NOT part of the final sticker. Here the design …

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## [Using Slicer to create a model of middle ear anatomy](https://discourse.slicer.org/t/using-slicer-to-create-a-model-of-middle-ear-anatomy/5169)

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**Author:** [@Kunal\_Sareen](https://discourse.slicer.org/u/Kunal_Sareen)\
**Replies:** 8\
**Last updated:** [June 21, 2025, 3:07pm UTC](https://discourse.slicer.org/t/using-slicer-to-create-a-model-of-middle-ear-anatomy/5169 "2025-06-21T15:07:18Z")

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I’m currently working on trying to use Slicer for segmenting the anatomical structures significant to the middle ear. I’m having troubles in trying to segment structures in a high resolution Brain CT. Is there any soluti…

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## [Monailabel numpy.bool version conflict](https://discourse.slicer.org/t/monailabel-numpy-bool-version-conflict/43442)

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**Author:** [@chz31](https://discourse.slicer.org/u/chz31)\
**Replies:** 0\
**Last updated:** [June 20, 2025, 10:02pm UTC](https://discourse.slicer.org/t/monailabel-numpy-bool-version-conflict/43442 "2025-06-20T22:02:08Z")

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Hi, I installed monailabel in a conda environment using pip install -U monailabel following instructions: https://github.com/Project-MONAI/MONAILabel. My pytorch version is 2.6.0 with cu124. Python version is 3.9. Howe…

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## [Is my perfusion file incomplete or am I incorrectly importing it? (DSC -\> rCBV)](https://discourse.slicer.org/t/is-my-perfusion-file-incomplete-or-am-i-incorrectly-importing-it-dsc-rcbv/43399)

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**Author:** [@SegmenterSam](https://discourse.slicer.org/u/SegmenterSam)\
**Replies:** 4\
**Last updated:** [June 20, 2025, 3:44pm UTC](https://discourse.slicer.org/t/is-my-perfusion-file-incomplete-or-am-i-incorrectly-importing-it-dsc-rcbv/43399 "2025-06-20T15:44:21Z")

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Hello, I have a patient with a perfusion MRI which counts 925 slides originally in their electronic file. When exporting this file, our exporting software creates a folder with 37 files (925/25) and loading it into 3DSl…

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## [Project Week 43 is starting on Monday! (last minute instructions)](https://discourse.slicer.org/t/project-week-43-is-starting-on-monday-last-minute-instructions/43438)

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**Author:** [@drouin-simon](https://discourse.slicer.org/u/drouin-simon)\
**Replies:** 0\
**Last updated:** [June 20, 2025, 2:52pm UTC](https://discourse.slicer.org/t/project-week-43-is-starting-on-monday-last-minute-instructions/43438 "2025-06-20T14:52:08Z")

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Dear Project Week attendees, We are looking forward to welcoming you in Montreal next Monday for the 43rd edition of the NA-MIC Project Week. Doors will open at 8am on Monday and coffee will be served starting at 9am. …

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## [setting up pyradiomics in python3 virtual env't](https://discourse.slicer.org/t/setting-up-pyradiomics-in-python3-virtual-envt/43434)

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**Author:** [@tsc](https://discourse.slicer.org/u/tsc)\
**Replies:** 0\
**Last updated:** [June 20, 2025, 2:47pm UTC](https://discourse.slicer.org/t/setting-up-pyradiomics-in-python3-virtual-envt/43434 "2025-06-20T14:47:41Z")

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I am having some trouble with pyradiomics in my python3 virtual env’t on one particular server. The issue may be that numpy 1.21.5 is present on the server and numpy 2.2.6 is present in the virtual env’t. Pyradiomics …

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## [Issue with Including Scripted Module in Custom Slicer-Based Application](https://discourse.slicer.org/t/issue-with-including-scripted-module-in-custom-slicer-based-application/43408)

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**Author:** [@software](https://discourse.slicer.org/u/software)\
**Replies:** 6\
**Last updated:** [June 20, 2025, 7:49am UTC](https://discourse.slicer.org/t/issue-with-including-scripted-module-in-custom-slicer-based-application/43408 "2025-06-20T07:49:29Z")

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Hi all, I’ve developed a custom Slicer-based application and included a custom scripted module called HemisphereVolumeCalculator In my top-level CMakeLists.txt, I’ve added it using: set(Slicer\_EXTENSION\_SOURCE\_DIRS …

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## [Oculomotor muscles segmentation in Total Segmentator](https://discourse.slicer.org/t/oculomotor-muscles-segmentation-in-total-segmentator/42585)

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**Author:** [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Replies:** 6\
**Last updated:** [June 20, 2025, 7:03am UTC](https://discourse.slicer.org/t/oculomotor-muscles-segmentation-in-total-segmentator/42585 "2025-06-20T07:03:10Z")

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Hi, Jakob; Congratulations on the Oculomotor muscles segmentation you implemented in Total segmentator. I spent much time doing the 20 manual segmentations, but it was worth it. I tried your new module, and the results a…

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## [Crashing with some data](https://discourse.slicer.org/t/crashing-with-some-data/42166)

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**Author:** [@ValerieS](https://discourse.slicer.org/u/ValerieS)\
**Replies:** 13\
**Last updated:** [June 19, 2025, 11:44pm UTC](https://discourse.slicer.org/t/crashing-with-some-data/42166 "2025-06-19T23:44:19Z")

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Hi. I am working on Windows 11 and experiencing regular crashes with 3D Slicer. It is happing with data I have used in the past with no problem. I switched to my Mac lap top, same 3D slicer version (5.8.1), same data and…

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