# Latest

**URL:** https://discourse.slicer.org/latest.md?page=21

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

**Page:** 22

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## [TotalSegmentator install problem - pytorch version?](https://discourse.slicer.org/t/totalsegmentator-install-problem-pytorch-version/46167)

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**Author:** [@mhopeng](https://discourse.slicer.org/u/mhopeng)\
**Replies:** 2\
**Last updated:** [February 19, 2026, 5:02am UTC](https://discourse.slicer.org/t/totalsegmentator-install-problem-pytorch-version/46167 "2026-02-19T05:02:56Z")

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Hello, I’ve tried to install TotalSegmentator on two macOS systems. When I try to run the sample data set, I get an error that seems to be related to the PyTorch version: ImportError: cannot import name ‘GradScaler’ fro…

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

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**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")

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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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## [Scissor Tool Not Working](https://discourse.slicer.org/t/scissor-tool-not-working/46214)

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**Author:** [@jjjooosssiiieee](https://discourse.slicer.org/u/jjjooosssiiieee)\
**Replies:** 3\
**Last updated:** [February 19, 2026, 2:41am UTC](https://discourse.slicer.org/t/scissor-tool-not-working/46214 "2026-02-19T02:41:17Z")

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I have a university project due tomorrow and am in need of URGENT HELP. I am creating images of mouse organs however once i find my organ i must use the scissor tool to cut away the excess however it is not working. I’ve…

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## [Technical terms translation](https://discourse.slicer.org/t/technical-terms-translation/46220)

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**Author:** [@Antonio\_Oliveira](https://discourse.slicer.org/u/Antonio_Oliveira)\
**Replies:** 2\
**Last updated:** [February 19, 2026, 12:22am UTC](https://discourse.slicer.org/t/technical-terms-translation/46220 "2026-02-19T00:22:39Z")

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There are some technical terms, not particular to any field, that upon translation come out as nonsensical due to that term not being used in the translated version. I’ll give one example, but I’ve come across others. I…

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## [How can I call 3D Slicer fully externally and automate a workflow? ](https://discourse.slicer.org/t/how-can-i-call-3d-slicer-fully-externally-and-automate-a-workflow/46042)

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**Author:** [@JoshMono](https://discourse.slicer.org/u/JoshMono)\
**Replies:** 6\
**Last updated:** [February 18, 2026, 4:33pm UTC](https://discourse.slicer.org/t/how-can-i-call-3d-slicer-fully-externally-and-automate-a-workflow/46042 "2026-02-18T16:33:43Z")

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Hey there folks. I’m working on a software assignment where my goal is to help automate a couple of tasks for my employer. My employer uses 3D Slicer, Meshlab and eventually Blender to make a 3D model from Dicom files a…

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## [Question regarding resample and segmentation](https://discourse.slicer.org/t/question-regarding-resample-and-segmentation/46193)

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**Author:** [@CS1](https://discourse.slicer.org/u/CS1)\
**Replies:** 5\
**Last updated:** [February 18, 2026, 3:02pm UTC](https://discourse.slicer.org/t/question-regarding-resample-and-segmentation/46193 "2026-02-18T15:02:45Z")

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I’m trying to understand how resampling may change my volume outcome that’s generated by segment statistic to mitigate error as I’m structuring my segmentation method, so I would greatly appreciate some input and help! B…

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## [3D Slicer Tutorial Videos — Porosity Analysis, Image Registration & More 🚀](https://discourse.slicer.org/t/3d-slicer-tutorial-videos-porosity-analysis-image-registration-more/46198)

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**Author:** [@Academy.XRM](https://discourse.slicer.org/u/Academy.XRM)\
**Replies:** 2\
**Last updated:** [February 18, 2026, 2:25pm UTC](https://discourse.slicer.org/t/3d-slicer-tutorial-videos-porosity-analysis-image-registration-more/46198 "2026-02-18T14:25:31Z")

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Hi everyone, I’ve started a YouTube tutorial series focused on practical workflows in 3D Slicer, and I’d love to share it with the community here. So far, the videos cover topics such as: • Porosity analysis workflows …

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## [Image dimensions, image spacing and segmentation size](https://discourse.slicer.org/t/image-dimensions-image-spacing-and-segmentation-size/33881)

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**Author:** [@anasmh101](https://discourse.slicer.org/u/anasmh101)\
**Replies:** 8\
**Last updated:** [February 17, 2026, 7:21pm UTC](https://discourse.slicer.org/t/image-dimensions-image-spacing-and-segmentation-size/33881 "2026-02-17T19:21:09Z")

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Hello everyone I have question, I have several CBCTs for same patient taken in different time points, these CBCTs are in different image dimensions and image spacing, and i want to measure and compare the size of a cert…

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## [Physician & Medical Imaging Engineer | Segmentation, CFD Prep & Imaging AI](https://discourse.slicer.org/t/physician-medical-imaging-engineer-segmentation-cfd-prep-imaging-ai/46194)

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**Author:** [@drnoorfatima](https://discourse.slicer.org/u/drnoorfatima)\
**Replies:** 0\
**Last updated:** [February 17, 2026, 6:37pm UTC](https://discourse.slicer.org/t/physician-medical-imaging-engineer-segmentation-cfd-prep-imaging-ai/46194 "2026-02-17T18:37:39Z")

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Hi everyone, I’m Noor , a physician with a background in neurology and clinical imaging, and over the past few years I’ve built a parallel focus in medical image processing and 3D reconstruction. I work at the intersec…

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## [Segmentation of arteriography and T1w with Gadolinium](https://discourse.slicer.org/t/segmentation-of-arteriography-and-t1w-with-gadolinium/41361)

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**Author:** [@papagif66](https://discourse.slicer.org/u/papagif66)\
**Replies:** 8\
**Last updated:** [February 17, 2026, 12:54pm UTC](https://discourse.slicer.org/t/segmentation-of-arteriography-and-t1w-with-gadolinium/41361 "2026-02-17T12:54:51Z")

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Hello, I’m working on a Moya Moya patient dataset, that includes T1w with Gadolinuim, CT, and arteriography. I registered the images and segmented the skull, from the CT and also from the T1Gado using mri\_synthstrip. …

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## [CBCT volumetric alveolar comparison before after bone graft](https://discourse.slicer.org/t/cbct-volumetric-alveolar-comparison-before-after-bone-graft/45920)

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**Author:** [@Zah](https://discourse.slicer.org/u/Zah)\
**Replies:** 1\
**Last updated:** [February 17, 2026, 12:45pm UTC](https://discourse.slicer.org/t/cbct-volumetric-alveolar-comparison-before-after-bone-graft/45920 "2026-02-17T12:45:56Z")

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Hi there, I am totally new to slicer and would like to use it for a research study where volumetric changes of alveolar bone is measured before and after grafting. I have gone through the tutorials and there is a quantit…

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## [endless loading in the dental segmentator ](https://discourse.slicer.org/t/endless-loading-in-the-dental-segmentator/46175)

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**Author:** [@Imran](https://discourse.slicer.org/u/Imran)\
**Replies:** 1\
**Last updated:** [February 17, 2026, 9:53am UTC](https://discourse.slicer.org/t/endless-loading-in-the-dental-segmentator/46175 "2026-02-17T09:53:01Z")

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I installed the dental segmentator extension to automatically segment the cbct. I download the cbct, click apply, and the download begins, which lasts indefinitely. nvidia rtx 4070 gpu. then I entered this command (slice…

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## [How can I export a brain tumor 3d model with brains opacity?](https://discourse.slicer.org/t/how-can-i-export-a-brain-tumor-3d-model-with-brains-opacity/21625)

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**Author:** [@Vinesh13](https://discourse.slicer.org/u/Vinesh13)\
**Replies:** 2\
**Last updated:** [February 17, 2026, 9:29am UTC](https://discourse.slicer.org/t/how-can-i-export-a-brain-tumor-3d-model-with-brains-opacity/21625 "2026-02-17T09:29:46Z")

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I used the segmentation for making the brain and tumor…later after exporting as an object file with merging both the segments as a single file,I opened this obj file in 3d viewer…but the output doesn’t has the brains opa…

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## [Brain MRI Gray Matter Segmentation](https://discourse.slicer.org/t/brain-mri-gray-matter-segmentation/23718)

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**Author:** [@klippert](https://discourse.slicer.org/u/klippert)\
**Replies:** 17\
**Last updated:** [February 17, 2026, 8:56am UTC](https://discourse.slicer.org/t/brain-mri-gray-matter-segmentation/23718 "2026-02-17T08:56:22Z")

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Dear Community, I’m just a 3d printing nerd looking to print my brain from MRI/DCOM files. I’ve been able to extract my brain using HD-BET and Swiss Skull Stripper. Now I’m trying to just isolate the gray matter/cerebr…

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## [Brain Tissues Extension not found/Separating Brain Tissues](https://discourse.slicer.org/t/brain-tissues-extension-not-found-separating-brain-tissues/15427)

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**Author:** [@Miguel](https://discourse.slicer.org/u/Miguel)\
**Replies:** 1\
**Last updated:** [February 17, 2026, 8:55am UTC](https://discourse.slicer.org/t/brain-tissues-extension-not-found-separating-brain-tissues/15427 "2026-02-17T08:55:09Z")

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Hello all, I need to separate gray and white matter and CSF from a volume, but I cannot find the BrainTissuesExtension. I am new here so I don’t know if there is an efficient way to segment it, or how can I install it. …

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## [Generate a 3d model/point cloud from CT scan of abdomen](https://discourse.slicer.org/t/generate-a-3d-model-point-cloud-from-ct-scan-of-abdomen/34842)

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**Author:** [@Pratima](https://discourse.slicer.org/u/Pratima)\
**Replies:** 2\
**Last updated:** [February 17, 2026, 8:37am UTC](https://discourse.slicer.org/t/generate-a-3d-model-point-cloud-from-ct-scan-of-abdomen/34842 "2026-02-17T08:37:25Z")

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Hello, I want to know step-by-step process on how to convert and download a segmented CT scan model (visible in Slicer) into Point Cloud/STL format. I am a beginner in 3D slicing. Any help is highly appreciated.

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## [endless loading in the dental segmentator](https://discourse.slicer.org/t/endless-loading-in-the-dental-segmentator/46178)

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**Author:** [@Imran](https://discourse.slicer.org/u/Imran)\
**Replies:** 0\
**Last updated:** [February 16, 2026, 4:51pm UTC](https://discourse.slicer.org/t/endless-loading-in-the-dental-segmentator/46178 "2026-02-16T16:51:15Z")

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I installed the dental segmentator extension to automatically segment the cbct. I download the cbct, click apply, and the download begins, which lasts indefinitely. nvidia rtx 4070 gpu. help me fix it

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## [Generate segmentation node (binary label map) from centerline](https://discourse.slicer.org/t/generate-segmentation-node-binary-label-map-from-centerline/26166)

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**Author:** [@RomanStriker](https://discourse.slicer.org/u/RomanStriker)\
**Replies:** 5\
**Last updated:** [February 16, 2026, 1:03am UTC](https://discourse.slicer.org/t/generate-segmentation-node-binary-label-map-from-centerline/26166 "2026-02-16T01:03:58Z")

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Hi, I want to obtain a label map corresponding to centerline generated by VMTK. I would also like to get a different label for voxels belonging to different branches. I have generated centerline tree for a vessel label…

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## [SlicerIGT U37 Neuronav Error](https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106)

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**Author:** [@coldfire85](https://discourse.slicer.org/u/coldfire85)\
**Replies:** 2\
**Last updated:** [February 15, 2026, 6:14pm UTC](https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106 "2026-02-15T18:14:25Z")

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IM trying to follow the tutorial from Neuronav ppt but i run into this error - \[VTK\] Warning: In vtkMRMLMarkupsFiducialNode.h, line 113 \[VTK\] vtkMRMLMarkupsFiducialNode (0000029120E822D0): vtkMRMLMarkupsFiducialNode::A…

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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)

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**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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## [Problem with TotalSegmentator - my computer freezes](https://discourse.slicer.org/t/problem-with-totalsegmentator-my-computer-freezes/46068)

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**Author:** [@jimenagonzalezsal](https://discourse.slicer.org/u/jimenagonzalezsal)\
**Replies:** 2\
**Last updated:** [February 15, 2026, 2:08pm UTC](https://discourse.slicer.org/t/problem-with-totalsegmentator-my-computer-freezes/46068 "2026-02-15T14:08:29Z")

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Hello! I need help. I’m trying to segment lumbar spine DICOMs, but whenever I click Apply, my computer freezes and the segmentation never finishes.

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## [Unable to add DICOM data](https://discourse.slicer.org/t/unable-to-add-dicom-data/46156)

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**Author:** [@Akash\_Raj\_G\_P](https://discourse.slicer.org/u/Akash_Raj_G_P)\
**Replies:** 2\
**Last updated:** [February 14, 2026, 3:38pm UTC](https://discourse.slicer.org/t/unable-to-add-dicom-data/46156 "2026-02-14T15:38:56Z")

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When I click on the ‘Add DICOM data’ button on the homepage I get an error message that says ‘Unfortunately this requested module is not available in this Slicer session‘. I have not seen this error occur for anybody els…

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## [Brain Modelling](https://discourse.slicer.org/t/brain-modelling/46154)

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**Author:** [@nakcali](https://discourse.slicer.org/u/nakcali)\
**Replies:** 2\
**Last updated:** [February 14, 2026, 3:36pm UTC](https://discourse.slicer.org/t/brain-modelling/46154 "2026-02-14T15:36:52Z")

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Hello, Can someone help me? I am trying to create a 3D model of my brain. I am using Swiss Skull Stripper, but I am not able to do it properly. It looks like lego brain. My MRI data seem to be divided into several grou…

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

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**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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## [Calculating difference in dose between two CT scans](https://discourse.slicer.org/t/calculating-difference-in-dose-between-two-ct-scans/46047)

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**Author:** [@hanginghats](https://discourse.slicer.org/u/hanginghats)\
**Replies:** 3\
**Last updated:** [February 14, 2026, 5:11am UTC](https://discourse.slicer.org/t/calculating-difference-in-dose-between-two-ct-scans/46047 "2026-02-14T05:11:02Z")

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I’m doing a project which requires me to analyse the difference in dose between two identical CT scans reconstructed with different algorithms. Is there any way for me to do this with slicer and slicerRT?

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## [Guidance on Intensity Correction for Siemens Multiband EPI Data](https://discourse.slicer.org/t/guidance-on-intensity-correction-for-siemens-multiband-epi-data/46155)

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**Author:** [@Muhammad\_Faizan](https://discourse.slicer.org/u/Muhammad_Faizan)\
**Replies:** 1\
**Last updated:** [February 14, 2026, 4:56am UTC](https://discourse.slicer.org/t/guidance-on-intensity-correction-for-siemens-multiband-epi-data/46155 "2026-02-14T04:56:26Z")

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I am working with EPI d ata acquired on a Siemens 3T scanner. The data is multiband with no in-plane acceleration. I reconstructed the multiband data using the slice GRAPPA technique. However, I am facing an issue: …

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## [Markups misalignment with the volume](https://discourse.slicer.org/t/markups-misalignment-with-the-volume/46137)

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**Author:** [@SANTIAGO\_PENDON\_MING](https://discourse.slicer.org/u/SANTIAGO_PENDON_MING)\
**Replies:** 1\
**Last updated:** [February 14, 2026, 4:47am UTC](https://discourse.slicer.org/t/markups-misalignment-with-the-volume/46137 "2026-02-14T04:47:56Z")

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Hi to everyone. I’m using this script to extract the pointCloud positions in IJK system: def RAStoIJK(xyz, volumeNode, RAS = True): """ Transforms a list of points or np array of shape (n,3) in RAS coordinates …

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## [Data Load Failed](https://discourse.slicer.org/t/data-load-failed/46144)

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**Author:** [@Daniel\_C](https://discourse.slicer.org/u/Daniel_C)\
**Replies:** 3\
**Last updated:** [February 13, 2026, 7:04pm UTC](https://discourse.slicer.org/t/data-load-failed/46144 "2026-02-13T19:04:42Z")

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Hi there, I encountered an error while trying to open a set of CT TIFF images. The error message only shows “load failed.” Is there any way to resolve this issue?

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## [How to use the PySERA in 3D Slicer?](https://discourse.slicer.org/t/how-to-use-the-pysera-in-3d-slicer/46133)

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**Author:** [@Subhash\_Kheruka](https://discourse.slicer.org/u/Subhash_Kheruka)\
**Replies:** 0\
**Last updated:** [February 12, 2026, 7:07am UTC](https://discourse.slicer.org/t/how-to-use-the-pysera-in-3d-slicer/46133 "2026-02-12T07:07:29Z")

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I want to know how to install the pysera in 3 D slicer

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## [3D slicer 5.10 SlicerSPECTRecon Critical warning: this will cause errors after 2025-11-30](https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132)

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**Author:** [@macp970617](https://discourse.slicer.org/u/macp970617)\
**Replies:** 0\
**Last updated:** [February 12, 2026, 7:06am UTC](https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132 "2026-02-12T07:06:14Z")

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Applications/Slicer.app/Contents/Extensions-34045/SPECTRecon/lib/Slicer-5.10/qt-scripted-modules/SPECTRecon.py:3: UserWarning: pkg\_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg\_resources…

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