# Latest

**URL:** https://discourse.slicer.org/latest.md?page=48

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

**Page:** 49

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## [qMRMLSubjectHierarchyComboBox as parameter node](https://discourse.slicer.org/t/qmrmlsubjecthierarchycombobox-as-parameter-node/43711)

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**Author:** [@Amy\_Morton](https://discourse.slicer.org/u/Amy_Morton)\
**Replies:** 2\
**Last updated:** [July 15, 2025, 1:52pm UTC](https://discourse.slicer.org/t/qmrmlsubjecthierarchycombobox-as-parameter-node/43711 "2025-07-15T13:52:30Z")

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I’d like to programmatically assign a subject hierarchy group to a qMRMLSubjectHierarchyComboBox in my module. After setting SlicerParameterName property to hNode, in designer I add hNode to my parameterNodeWrapper hNod…

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## [Secgmentation of a small dental CBCT](https://discourse.slicer.org/t/secgmentation-of-a-small-dental-cbct/43731)

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**Author:** [@Multipack](https://discourse.slicer.org/u/Multipack)\
**Replies:** 0\
**Last updated:** [July 15, 2025, 1:25pm UTC](https://discourse.slicer.org/t/secgmentation-of-a-small-dental-cbct/43731 "2025-07-15T13:25:53Z")

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Operating system: Windows Slicer version: 5.8.1 Expected behavior: Segment a small volume CBCT of the anterior maxilla i.e divide teeth from bone. Actual behavior: no 3D image is created, I get an error message: Fail…

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## [Is it possible in pyradiomics to normalize only the ROI and not the entire image?](https://discourse.slicer.org/t/is-it-possible-in-pyradiomics-to-normalize-only-the-roi-and-not-the-entire-image/43721)

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**Author:** [@Alessandro\_Ghilardi](https://discourse.slicer.org/u/Alessandro_Ghilardi)\
**Replies:** 0\
**Last updated:** [July 15, 2025, 4:26am UTC](https://discourse.slicer.org/t/is-it-possible-in-pyradiomics-to-normalize-only-the-roi-and-not-the-entire-image/43721 "2025-07-15T04:26:26Z")

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I need to know if there’s a standard way to normalize only the ROI. I tried to create a function to do so but in this case filtered versions of the image would be calculated only after the ROI normalization (which means …

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## [Volume or Surface Area for 2D Ultrasound Segmentation?](https://discourse.slicer.org/t/volume-or-surface-area-for-2d-ultrasound-segmentation/43706)

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**Author:** [@Arian\_Amini](https://discourse.slicer.org/u/Arian_Amini)\
**Replies:** 2\
**Last updated:** [July 14, 2025, 5:24pm UTC](https://discourse.slicer.org/t/volume-or-surface-area-for-2d-ultrasound-segmentation/43706 "2025-07-14T17:24:49Z")

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Hello, I posted this a few weeks ago but received no response, and wanted to try my luck again. I won’t continue to spam with this question if there are no responses again. Thank you for understanding. I have segmented…

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## [Having trouble with TotalSegmentator](https://discourse.slicer.org/t/having-trouble-with-totalsegmentator/43710)

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**Author:** [@Celina\_Hallal](https://discourse.slicer.org/u/Celina_Hallal)\
**Replies:** 1\
**Last updated:** [July 14, 2025, 2:32pm UTC](https://discourse.slicer.org/t/having-trouble-with-totalsegmentator/43710 "2025-07-14T14:32:46Z")

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Operating system: MacOS Sequoia 15.5 Slicer version: 5.9.0 Expected behavior: Automated segmentation of organs, segmentation of liver segments Actual behavior: Extension fails to compute results I am trying to use To…

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## [Problems with a microtomography and growing from seeds](https://discourse.slicer.org/t/problems-with-a-microtomography-and-growing-from-seeds/43681)

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**Author:** [@JaredAmudeo](https://discourse.slicer.org/u/JaredAmudeo)\
**Replies:** 15\
**Last updated:** [July 14, 2025, 2:56am UTC](https://discourse.slicer.org/t/problems-with-a-microtomography-and-growing-from-seeds/43681 "2025-07-14T02:56:13Z")

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Hello! I need a little help understanding the ideal hardware for this feature to work quickly, or fast enough. On my personal computer, I haven’t had any “issues” with files requiring more RAM than I have, and when I do,…

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## [SPHARM PDM Correspondence improvement](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897)

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**Author:** [@lili-yu22](https://discourse.slicer.org/u/lili-yu22)\
**Replies:** 23\
**Last updated:** [July 12, 2025, 8:54pm UTC](https://discourse.slicer.org/t/spharm-pdm-correspondence-improvement/23897 "2025-07-12T20:54:19Z")

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Slicer salt3.0，windows10 when I use“ spharm-pdm correspondence improvement ”the python show "OSError：Invalid argument：“C：//users//…//2022—06—16T11:51:18.762701.csv”. the input models directory: i use the\*SPHARM.vtk. …

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## [Getting the preview working on newer MacOS](https://discourse.slicer.org/t/getting-the-preview-working-on-newer-macos/43670)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [July 12, 2025, 5:44pm UTC](https://discourse.slicer.org/t/getting-the-preview-working-on-newer-macos/43670 "2025-07-12T17:44:24Z")

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On Mac when I download a preview version and copy the package contents to my Desktop, I usually have to command+Click and then choose Open Anyways to disregard the warning message about Slicer being potentially a dangero…

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## [Model/Markups Coordinate systems](https://discourse.slicer.org/t/model-markups-coordinate-systems/43691)

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**Author:** [@Ryan\_Jones](https://discourse.slicer.org/u/Ryan_Jones)\
**Replies:** 2\
**Last updated:** [July 12, 2025, 2:41pm UTC](https://discourse.slicer.org/t/model-markups-coordinate-systems/43691 "2025-07-12T14:41:43Z")

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I have a model, that I am exporting from 3D slicer by right clicking the model and exporting to file- selecting stl. There is no option to choose coordinate system. I also have a list of closed curves that I want to outp…

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## [How to measure the mandibular condyle morphological changes between two time different points CT?](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677)

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**Author:** [@wael\_telha](https://discourse.slicer.org/u/wael_telha)\
**Replies:** 6\
**Last updated:** [July 12, 2025, 1:58pm UTC](https://discourse.slicer.org/t/how-to-measure-the-mandibular-condyle-morphological-changes-between-two-time-different-points-ct/25677 "2025-07-12T13:58:00Z")

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Hi 3D Slicer users, I am currently conducting a research to measure the mandibular condyle morphological changes between two time-different points CT: I tried to use SPHARM-PDM to achieve this goal but it is not workin…

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## [Scene views broken?](https://discourse.slicer.org/t/scene-views-broken/43682)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [July 11, 2025, 7:04pm UTC](https://discourse.slicer.org/t/scene-views-broken/43682 "2025-07-11T19:04:42Z")

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When I try to use scene views, I can capture the node state but cannot restore from it. This is on latest preview on Mac. There are also messages like this in the log file: Switch to module: "SceneViews" "Segmentation"…

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## [how to manually edit part of a curve after automatic generation in 3d slicer?](https://discourse.slicer.org/t/how-to-manually-edit-part-of-a-curve-after-automatic-generation-in-3d-slicer/43650)

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**Author:** [@LJW](https://discourse.slicer.org/u/LJW)\
**Replies:** 2\
**Last updated:** [July 11, 2025, 4:12pm UTC](https://discourse.slicer.org/t/how-to-manually-edit-part-of-a-curve-after-automatic-generation-in-3d-slicer/43650 "2025-07-11T16:12:01Z")

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Hi, I’m currently doing research and not very familiar with 3D Slicer, so I’m posting my question here. I generated a curve using the following settings: Curve Type: Shortest distance on surface Model Node: Model Cost…

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## [Build a Talairach grid](https://discourse.slicer.org/t/build-a-talairach-grid/17332)

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**Author:** [@matthieufaillot](https://discourse.slicer.org/u/matthieufaillot)\
**Replies:** 10\
**Last updated:** [July 11, 2025, 7:41am UTC](https://discourse.slicer.org/t/build-a-talairach-grid/17332 "2025-07-11T07:41:52Z")

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Operating system: Windows 10 Slicer version: 4.10.2 Expected behavior: overlay a Talairach grid system over a CT/MRI 3D volume Actual behavior: none Hello, I would like to create a talairach grid model such as perf…

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## [Slicer custom app crashing with --testing arg](https://discourse.slicer.org/t/slicer-custom-app-crashing-with-testing-arg/23209)

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**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 7\
**Last updated:** [July 11, 2025, 2:52am UTC](https://discourse.slicer.org/t/slicer-custom-app-crashing-with-testing-arg/23209 "2025-07-11T02:52:20Z")

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Using the latest of the SlicerCustomAppTemplate and using a default configuration that uses Qt 5.15.2, I’m experiencing that it always crashes when running with the --testing command line argument. The output is like the…

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## [Connecting Closed Curves](https://discourse.slicer.org/t/connecting-closed-curves/43683)

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**Author:** [@Ryan\_Jones](https://discourse.slicer.org/u/Ryan_Jones)\
**Replies:** 0\
**Last updated:** [July 10, 2025, 11:37pm UTC](https://discourse.slicer.org/t/connecting-closed-curves/43683 "2025-07-10T23:37:01Z")

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I have a series of closed curves representing a annular structure, I want to loft these into a solid model of the annulus. Is this possible in 3D slicer?

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## [Population Analysis Output](https://discourse.slicer.org/t/population-analysis-output/43644)

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**Author:** [@anasmh101](https://discourse.slicer.org/u/anasmh101)\
**Replies:** 4\
**Last updated:** [July 10, 2025, 5:52pm UTC](https://discourse.slicer.org/t/population-analysis-output/43644 "2025-07-10T17:52:38Z")

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Hello everyone, I’m currently working on a project that involves analyzing bone apposition and resorption in mandibular condyles by comparing pre-treatment and post-treatment CBCT scans. Here’s what I’ve done so far: …

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## [Custom slicer Ctest failed](https://discourse.slicer.org/t/custom-slicer-ctest-failed/43677)

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**Author:** [@hansmoda](https://discourse.slicer.org/u/hansmoda)\
**Replies:** 0\
**Last updated:** [July 10, 2025, 7:51am UTC](https://discourse.slicer.org/t/custom-slicer-ctest-failed/43677 "2025-07-10T07:51:26Z")

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I ran into this issue when I was performing automated tests with ctest command line：“D:\\cmake\\bin\\ctest.exe” -C Release -V -R “custommodule” error: \[D:/DSI/slicer-build/bin/Release/CustomApp-real.exe\] exit abnormally -…

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## [Error when running MONAI Auto3DSeg (cannot import name ‘MetaKeys’ from ‘monai.utils’)](https://discourse.slicer.org/t/error-when-running-monai-auto3dseg-cannot-import-name-metakeys-from-monai-utils/35738)

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**Author:** [@davidngqk88](https://discourse.slicer.org/u/davidngqk88)\
**Replies:** 5\
**Last updated:** [July 9, 2025, 4:37pm UTC](https://discourse.slicer.org/t/error-when-running-monai-auto3dseg-cannot-import-name-metakeys-from-monai-utils/35738 "2025-07-09T16:37:22Z")

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Am testing it on some abdominal CT datasets now. am getting errors saying ImportError: cannot import name ‘MetaKeys’ from ‘monai.utils’ ‘Processing failed with return code 1’ after it attempts to create the segmentat…

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## [Segmenting Thin Spaces (Sparse Contours)](https://discourse.slicer.org/t/segmenting-thin-spaces-sparse-contours/43647)

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**Author:** [@Ryan\_Jones](https://discourse.slicer.org/u/Ryan_Jones)\
**Replies:** 1\
**Last updated:** [July 9, 2025, 4:29pm UTC](https://discourse.slicer.org/t/segmenting-thin-spaces-sparse-contours/43647 "2025-07-09T16:29:08Z")

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Hi, I need to segment the subarachnoid space in some canine MRIs. This space is extremely thin, however, I would like to maintain some of the information about variable thicknesses so simply segmenting an inner surface a…

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## [CLOSEDPLANAR\_XOR visualization artefact with holes 2D](https://discourse.slicer.org/t/closedplanar-xor-visualization-artefact-with-holes-2d/43589)

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**Author:** [@ferhue](https://discourse.slicer.org/u/ferhue)\
**Replies:** 5\
**Last updated:** [July 9, 2025, 11:03am UTC](https://discourse.slicer.org/t/closedplanar-xor-visualization-artefact-with-holes-2d/43589 "2025-07-09T11:03:13Z")

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I have a 2D contour with a hole, that I am storing in an RTstruct as two contours of type CLOSEDPLANAR\_XOR. The visualization looks weird in 3D Slicer: whereas if I plot it in matplotlib, I do not see anything really…

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## [general registration](https://discourse.slicer.org/t/general-registration/43652)

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**Author:** [@Luca\_Ciani](https://discourse.slicer.org/u/Luca_Ciani)\
**Replies:** 2\
**Last updated:** [July 9, 2025, 1:21am UTC](https://discourse.slicer.org/t/general-registration/43652 "2025-07-09T01:21:02Z")

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good evening, i’d like to ask the reason why my microct scans can’t be seen in the general registration! I load the bitmap file series as a volume, but when I want to register them they don’t exist in the fixed image v…

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## [how to compute average vertical (y-axis) distance between two curves in 3d space?](https://discourse.slicer.org/t/how-to-compute-average-vertical-y-axis-distance-between-two-curves-in-3d-space/43649)

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**Author:** [@LJW](https://discourse.slicer.org/u/LJW)\
**Replies:** 1\
**Last updated:** [July 8, 2025, 9:39pm UTC](https://discourse.slicer.org/t/how-to-compute-average-vertical-y-axis-distance-between-two-curves-in-3d-space/43649 "2025-07-08T21:39:01Z")

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hi, i’m trying to find the average vertical distance (along the y-axis) between two curves in 3d space. basically, i want to measure how far apart the two curves are in the y-direction — not the full 3d distance, just …

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## [Difficulty Registering Pre- and Post-Surgery CBCT Datasets without Fiducials](https://discourse.slicer.org/t/difficulty-registering-pre-and-post-surgery-cbct-datasets-without-fiducials/43646)

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**Author:** [@A\_C](https://discourse.slicer.org/u/A_C)\
**Replies:** 1\
**Last updated:** [July 8, 2025, 9:32pm UTC](https://discourse.slicer.org/t/difficulty-registering-pre-and-post-surgery-cbct-datasets-without-fiducials/43646 "2025-07-08T21:32:24Z")

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Hi all, I’m currently working on a project involving two DICOM datasets acquired via CBCT (cone-beam CT). The first dataset was taken before a surgical procedure, and the second one after a tooth extraction. Unfortunate…

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## [Extracting Implants model form CT scan](https://discourse.slicer.org/t/extracting-implants-model-form-ct-scan/43607)

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**Author:** [@Naseem\_Machlovi](https://discourse.slicer.org/u/Naseem_Machlovi)\
**Replies:** 4\
**Last updated:** [July 8, 2025, 9:00pm UTC](https://discourse.slicer.org/t/extracting-implants-model-form-ct-scan/43607 "2025-07-08T21:00:18Z")

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Hi, I am new to 3d Slicer and figuring things out. I am planning to extract implant models from patient CT scans and then perform some FEA analysis. Can you please guide me if this is something doable, and if so, do we …

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## [Defining Custom Cross-Sectional Planes in 3D Slicer Using Vectors](https://discourse.slicer.org/t/defining-custom-cross-sectional-planes-in-3d-slicer-using-vectors/43645)

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**Author:** [@Alex-Martin1](https://discourse.slicer.org/u/Alex-Martin1)\
**Replies:** 1\
**Last updated:** [July 8, 2025, 5:35pm UTC](https://discourse.slicer.org/t/defining-custom-cross-sectional-planes-in-3d-slicer-using-vectors/43645 "2025-07-08T17:35:14Z")

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Hi everyone, I’m writing here to ask whether something I’ve been doing in Amira can be replicated in an open-source software like 3D Slicer. Specifically, I need to define a cross-sectional plane with a specific orient…

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## [Curve deviates or forms spikes when using Open Curve Markup Tool](https://discourse.slicer.org/t/curve-deviates-or-forms-spikes-when-using-open-curve-markup-tool/43654)

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**Author:** [@LJW](https://discourse.slicer.org/u/LJW)\
**Replies:** 0\
**Last updated:** [July 8, 2025, 12:46pm UTC](https://discourse.slicer.org/t/curve-deviates-or-forms-spikes-when-using-open-curve-markup-tool/43654 "2025-07-08T12:46:15Z")

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Hi, I’m using the Open Curve Markup Tool in 3D Slicer to create curves on a surface model, such as between the mesial and distal papilla of a tooth. To support this, I’m also calculating and visualizing minimum curvatur…

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## [Infarct volume CT scan](https://discourse.slicer.org/t/infarct-volume-ct-scan/43653)

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**Author:** [@dani07ms](https://discourse.slicer.org/u/dani07ms)\
**Replies:** 0\
**Last updated:** [July 8, 2025, 12:46pm UTC](https://discourse.slicer.org/t/infarct-volume-ct-scan/43653 "2025-07-08T12:46:11Z")

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Hi, I’m doing clinical research in neuroradiology and need to measure cerebellar infarct volumes and also posterior cranial fossa, braintem and cerebellum volumes of around 200 patients. I’m doing it with 3D Slicer but i…

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## [Repeated Segment Comparison Metric Calculations](https://discourse.slicer.org/t/repeated-segment-comparison-metric-calculations/43648)

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**Author:** [@vmcjmk](https://discourse.slicer.org/u/vmcjmk)\
**Replies:** 0\
**Last updated:** [July 8, 2025, 12:46pm UTC](https://discourse.slicer.org/t/repeated-segment-comparison-metric-calculations/43648 "2025-07-08T12:46:01Z")

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Hi there, I’m very new to 3D Slicer and was wondering about going through multiple pairs of segments in the segment comparison module. For each patient I have, I have one “reference segment” for each cancer nodule as a …

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## [Covariate Significance Testing - shape for p-value?](https://discourse.slicer.org/t/covariate-significance-testing-shape-for-p-value/29084)

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**Author:** [@Yuyoung](https://discourse.slicer.org/u/Yuyoung)\
**Replies:** 1\
**Last updated:** [July 8, 2025, 3:21am UTC](https://discourse.slicer.org/t/covariate-significance-testing-shape-for-p-value/29084 "2025-07-08T03:21:51Z")

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Hello everyone, I am currently using version 4.0.1 - 2023-02-08 of SlicerSALT to check out the morphological changes in the human pubic symphyseal surface as a result of aging. Specifically, I am now analyzing four age …

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## [Connect slicer with blender](https://discourse.slicer.org/t/connect-slicer-with-blender/43638)

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**Author:** [@Estherphan](https://discourse.slicer.org/u/Estherphan)\
**Replies:** 1\
**Last updated:** [July 8, 2025, 2:44am UTC](https://discourse.slicer.org/t/connect-slicer-with-blender/43638 "2025-07-08T02:44:46Z")

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Hello, everyone. I’m new to using Slicer. Right now, I need to design a surgical guide for implant placement, but I can’t link Slicer with Blender. Could anyone please help me?Thanks

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