# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=262

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

**Page:** 263

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## [Many qMRMLThreeDWidgets impact application performance](https://discourse.slicer.org/t/many-qmrmlthreedwidgets-impact-application-performance/19539)

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**Author:** [@xianger-qi](https://discourse.slicer.org/u/xianger-qi)\
**Replies:** 1\
**Last updated:** [September 7, 2021, 5:18pm UTC](https://discourse.slicer.org/t/many-qmrmlthreedwidgets-impact-application-performance/19539 "2021-09-07T17:18:24Z")

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If my application which base on slicer, need many qMRMLThreeDWidget, may be more than 10 qMRMLThreeDWidget. Is this will degrade the window rendering perfermence? and how do i do? Thanks for your help!

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## [Shape analysis using MFSDA](https://discourse.slicer.org/t/shape-analysis-using-mfsda/18018)

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**Author:** [@iyerkrithika21](https://discourse.slicer.org/u/iyerkrithika21)\
**Replies:** 6\
**Last updated:** [September 7, 2021, 1:11pm UTC](https://discourse.slicer.org/t/shape-analysis-using-mfsda/18018 "2021-09-07T13:11:56Z")

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Trying to run the Covariates Significance Test with SlicerSALT 3.0.0 The program fails if the selected folder to store the output values is empty If pvalues.json and output.vtk are some empty files placed in the output…

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## [Fail to import DICOM data with special characters in it](https://discourse.slicer.org/t/fail-to-import-dicom-data-with-special-characters-in-it/19529)

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**Author:** [@Esteban\_Barreiro](https://discourse.slicer.org/u/Esteban_Barreiro)\
**Replies:** 3\
**Last updated:** [September 7, 2021, 2:56am UTC](https://discourse.slicer.org/t/fail-to-import-dicom-data-with-special-characters-in-it/19529 "2021-09-07T02:56:08Z")

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There is a common problem importing DICOM files (or data) wich has a word that cames with an Ñ (/ɲ/ - ALT 165 in ascci) or even an accent mark (very common in countries that speak spanish). Lot of people goes crazy about…

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## [Segment 4D cardiac echo image](https://discourse.slicer.org/t/segment-4d-cardiac-echo-image/13984)

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**Author:** [@J\_Deng](https://discourse.slicer.org/u/J_Deng)\
**Replies:** 11\
**Last updated:** [September 6, 2021, 10:25pm UTC](https://discourse.slicer.org/t/segment-4d-cardiac-echo-image/13984 "2021-09-06T22:25:56Z")

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This thread sounds most relevant but it was last updated in Dec 2018. Any progress or new advice to address my query below? If I use Grow from Seeds, seeds I intend to place only for one time point during the cardiac cy…

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## [Aorta segmentation from CT](https://discourse.slicer.org/t/aorta-segmentation-from-ct/19380)

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**Author:** [@Gonzalo\_Rojas\_Costa](https://discourse.slicer.org/u/Gonzalo_Rojas_Costa)\
**Replies:** 1\
**Last updated:** [September 6, 2021, 1:06pm UTC](https://discourse.slicer.org/t/aorta-segmentation-from-ct/19380 "2021-09-06T13:06:57Z")

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Hi: How can I segment the aorta using a contrasted CT image (venous) ? Sincerely, Gonzalo Rojas Costa

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## [SetMatrixTransformToParent consume much time](https://discourse.slicer.org/t/setmatrixtransformtoparent-consume-much-time/19455)

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**Author:** [@xianger-qi](https://discourse.slicer.org/u/xianger-qi)\
**Replies:** 10\
**Last updated:** [September 6, 2021, 1:09am UTC](https://discourse.slicer.org/t/setmatrixtransformtoparent-consume-much-time/19455 "2021-09-06T01:09:38Z")

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There are a problem about my application when i invoke the method SetMatrixTransformToParent of vtkMRMLLinearTransformNode every times. In my MRMLScene there are more than 500 nodes, and executing the method SetMatrixTra…

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## [Nvidia AI-assisted segmentation (brain tumor)](https://discourse.slicer.org/t/nvidia-ai-assisted-segmentation-brain-tumor/19512)

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**Author:** [@Klakla](https://discourse.slicer.org/u/Klakla)\
**Replies:** 1\
**Last updated:** [September 5, 2021, 8:39am UTC](https://discourse.slicer.org/t/nvidia-ai-assisted-segmentation-brain-tumor/19512 "2021-09-05T08:39:23Z")

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HI, when I did segmentation to the tumour for image 1 by NVidia Clara AI-based automatic and determined the boundary unfortunately the result was in image 2 . the question is why when making boundary to the tumour, bound…

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## [Is SlicerJupyter broken on macOS due to argon2-cffi (again?)](https://discourse.slicer.org/t/is-slicerjupyter-broken-on-macos-due-to-argon2-cffi-again/15823)

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**Author:** [@pll\_llq](https://discourse.slicer.org/u/pll_llq)\
**Replies:** 24\
**Last updated:** [September 5, 2021, 7:39pm UTC](https://discourse.slicer.org/t/is-slicerjupyter-broken-on-macos-due-to-argon2-cffi-again/15823 "2021-09-05T19:39:07Z")

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Hi, This problem was mentioned here on the forum a couple of times already and some fixes that were made actually worked just a month ago. Forum posts: Commit that addressed the issue I was using Jupyter Lab insi…

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## [Get the observer](https://discourse.slicer.org/t/get-the-observer/17167)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 1\
**Last updated:** [September 5, 2021, 2:10am UTC](https://discourse.slicer.org/t/get-the-observer/17167 "2021-09-05T02:10:32Z")

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How can I get the observer(vtkObserver ) from a interactor. such as the print(interactor): vtkWin32RenderWindowInteractor (0000021811DBF070) Debug: Off Modified Time: 376531 Reference Count: 2 Registered Events: R…

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## [Fit SliceView Zoom](https://discourse.slicer.org/t/fit-sliceview-zoom/19331)

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**Author:** [@apparrilla](https://discourse.slicer.org/u/apparrilla)\
**Replies:** 2\
**Last updated:** [September 5, 2021, 2:06am UTC](https://discourse.slicer.org/t/fit-sliceview-zoom/19331 "2021-09-05T02:06:59Z")

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Hi everyone! I´m trying to fit a reformat slice view to volume size. I´ve finded slicer.util.setSliceViewerLayers(volumeNode, fit=True) but it reset also position and orientation. I´ve tried also sliceLogic.FitSliceToA…

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## [How to use endoscopy in python](https://discourse.slicer.org/t/how-to-use-endoscopy-in-python/15211)

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**Author:** [@yee\_lu](https://discourse.slicer.org/u/yee_lu)\
**Replies:** 1\
**Last updated:** [September 5, 2021, 1:07am UTC](https://discourse.slicer.org/t/how-to-use-endoscopy-in-python/15211 "2021-09-05T01:07:30Z")

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Now I have some txt files which have some centerline nodes，I want to generate endoscopy in batch, how to use endoscopy in python?

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## [Segmenting out of border of main volume](https://discourse.slicer.org/t/segmenting-out-of-border-of-main-volume/16067)

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**Author:** [@Aep93](https://discourse.slicer.org/u/Aep93)\
**Replies:** 11\
**Last updated:** [September 4, 2021, 7:19pm UTC](https://discourse.slicer.org/t/segmenting-out-of-border-of-main-volume/16067 "2021-09-04T19:19:35Z")

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Hello, I want to modify my segmentation by adding some details that are out of the borders of my main volume. However, it seems that the segment editor does not draw anything out of the borders of my master volume. Can a…

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## [3D Slicer Download is being blocked by Microsoft Defender windows 10](https://discourse.slicer.org/t/3d-slicer-download-is-being-blocked-by-microsoft-defender-windows-10/19504)

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**Author:** [@sameselby](https://discourse.slicer.org/u/sameselby)\
**Replies:** 1\
**Last updated:** [September 4, 2021, 3:24pm UTC](https://discourse.slicer.org/t/3d-slicer-download-is-being-blocked-by-microsoft-defender-windows-10/19504 "2021-09-04T15:24:31Z")

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I know this is not right but I have to ask is the download safe for 3d slicer I am being blocked by Microsoft windows 10 Defender is gives me the option to Report the file as safe i have no idea how many people get this …

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## [SUV for each lung lobes](https://discourse.slicer.org/t/suv-for-each-lung-lobes/19483)

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**Author:** [@Zhanat](https://discourse.slicer.org/u/Zhanat)\
**Replies:** 2\
**Last updated:** [September 3, 2021, 8:10am UTC](https://discourse.slicer.org/t/suv-for-each-lung-lobes/19483 "2021-09-03T08:10:01Z")

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Hi! How can I measure SUV for each lung lobe? I couldn’t do it with Chest Imaging Platform + SUV computation

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## [ResectionPlanner](https://discourse.slicer.org/t/resectionplanner/16868)

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**Author:** [@Saima](https://discourse.slicer.org/u/Saima)\
**Replies:** 3\
**Last updated:** [September 3, 2021, 6:00am UTC](https://discourse.slicer.org/t/resectionplanner/16868 "2021-09-03T06:00:43Z")

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Hi, I am unable to download the extension inside 3d slicer ResectionPlanner. Could you please help. Regards, Saima Safdar \[GCC 5.3.1 20160406 (Red Hat 5.3.1-6)\] on linux2 Traceback (most recent call last): Fi…

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## [Python debugger not connecting to Pycharm](https://discourse.slicer.org/t/python-debugger-not-connecting-to-pycharm/19284)

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**Author:** [@fullerkj](https://discourse.slicer.org/u/fullerkj)\
**Replies:** 1\
**Last updated:** [September 3, 2021, 5:48am UTC](https://discourse.slicer.org/t/python-debugger-not-connecting-to-pycharm/19284 "2021-09-03T05:48:19Z")

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Operating system: Ubuntu 18.04.5 LTS Slicer version: 4.11.20210226 PyCharm: 2021.2 (Professional Edition) Expected behavior: I followed the instructions on SlicerDebuggingTools/README.md at master · SlicerRt/SlicerDeb…

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## [qMRMLListWidget lists nodes of one type](https://discourse.slicer.org/t/qmrmllistwidget-lists-nodes-of-one-type/19490)

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**Author:** [@wabwan25](https://discourse.slicer.org/u/wabwan25)\
**Replies:** 1\
**Last updated:** [September 3, 2021, 4:55am UTC](https://discourse.slicer.org/t/qmrmllistwidget-lists-nodes-of-one-type/19490 "2021-09-03T04:55:38Z")

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I use qtdesigner to create a list widget to list model nodes in the scene, then a user can select multiple items for process. I use qMRMLListWidget, however, the function setMRMLScene(vtkMRMLScene\*) lists all the nodes.…

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## [Finding the displacement of a bone between neutral and condition](https://discourse.slicer.org/t/finding-the-displacement-of-a-bone-between-neutral-and-condition/19233)

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**Author:** [@matsuba8](https://discourse.slicer.org/u/matsuba8)\
**Replies:** 1\
**Last updated:** [September 3, 2021, 1:47am UTC](https://discourse.slicer.org/t/finding-the-displacement-of-a-bone-between-neutral-and-condition/19233 "2021-09-03T01:47:51Z")

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Hello! I’m still quite new to Slicer and wanted to post in this forum to see if someone could assist me. I am using Slicer to perform some analysis for a research project. Our objective is to examine the displacement o…

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## [Extension Manager doen not show any extension](https://discourse.slicer.org/t/extension-manager-doen-not-show-any-extension/19457)

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**Author:** [@ylcnkzy](https://discourse.slicer.org/u/ylcnkzy)\
**Replies:** 5\
**Last updated:** [September 3, 2021, 1:26am UTC](https://discourse.slicer.org/t/extension-manager-doen-not-show-any-extension/19457 "2021-09-03T01:26:38Z")

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It seems like there is a problem with the extension manager. There is no extension seen at the extension manager. I thought it might be specific to me, but then I realized that there is an update on the software. For the…

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## [Linear transform documentation clarification?](https://discourse.slicer.org/t/linear-transform-documentation-clarification/16229)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 1\
**Last updated:** [September 3, 2021, 12:28am UTC](https://discourse.slicer.org/t/linear-transform-documentation-clarification/16229 "2021-09-03T00:28:52Z")

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On https://slicer.readthedocs.io/en/latest/developer\_guide/modules/transforms.html, which I believe is the current documentation page for slicer transforms, it is a little unclear which form is displayed in the Transform…

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## [Orthogonal reformat](https://discourse.slicer.org/t/orthogonal-reformat/19377)

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**Author:** [@Gonzalo\_Rojas\_Costa](https://discourse.slicer.org/u/Gonzalo_Rojas_Costa)\
**Replies:** 3\
**Last updated:** [September 2, 2021, 7:51pm UTC](https://discourse.slicer.org/t/orthogonal-reformat/19377 "2021-09-02T19:51:03Z")

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Hi: I am reformating an isotropic MRI using the reformat widget. How can I do this reformatting so that the slices are orthogonal to each other? Sincerely, Gonzalo Rojas Costa

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## [How do I make a sphere cut for segmentation?](https://discourse.slicer.org/t/how-do-i-make-a-sphere-cut-for-segmentation/19486)

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**Author:** [@akshay\_pillai](https://discourse.slicer.org/u/akshay_pillai)\
**Replies:** 1\
**Last updated:** [September 2, 2021, 5:50pm UTC](https://discourse.slicer.org/t/how-do-i-make-a-sphere-cut-for-segmentation/19486 "2021-09-02T17:50:36Z")

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I want to create a sphere segment. I try to use scissors and circle effect but that doesn’t result in a good sphere. I am looking to obtain something like this : How can I obtain this? just the sphere part.

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## [can you tell me step by step how can i measure brain volume in slicer 4.11 from structural mri ](https://discourse.slicer.org/t/can-you-tell-me-step-by-step-how-can-i-measure-brain-volume-in-slicer-4-11-from-structural-mri/19295)

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**Author:** [@aalaa12341](https://discourse.slicer.org/u/aalaa12341)\
**Replies:** 7\
**Last updated:** [September 2, 2021, 2:49pm UTC](https://discourse.slicer.org/t/can-you-tell-me-step-by-step-how-can-i-measure-brain-volume-in-slicer-4-11-from-structural-mri/19295 "2021-09-02T14:49:52Z")

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Operating system: Slicer version: Expected behavior: Actual behavior:

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## [Is MonaiLabel functional?](https://discourse.slicer.org/t/is-monailabel-functional/19376)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 7\
**Last updated:** [September 2, 2021, 9:36am UTC](https://discourse.slicer.org/t/is-monailabel-functional/19376 "2021-09-02T09:36:58Z")

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I am trying to use MonaiLabel on windows build from 6/28 (4.13.0-2021-06-28 r30015 / 1807944). Extension is installed, but when Slicer starts there is this error in Python window: RuntimeError: qSlicerScriptedLoadableM…

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## [How do I increase the area outside my mri scans?](https://discourse.slicer.org/t/how-do-i-increase-the-area-outside-my-mri-scans/19474)

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**Author:** [@akshay\_pillai](https://discourse.slicer.org/u/akshay_pillai)\
**Replies:** 1\
**Last updated:** [September 1, 2021, 9:37pm UTC](https://discourse.slicer.org/t/how-do-i-increase-the-area-outside-my-mri-scans/19474 "2021-09-01T21:37:50Z")

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I want to create a sphere in front of my mri scans in 3d but the space outside the scans is very less I need to increase this space to obtain a sphere. How do I increase the boundary size in the mri scans for both 3d and…

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## [Calculating consolidation volume in CT lung](https://discourse.slicer.org/t/calculating-consolidation-volume-in-ct-lung/19386)

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**Author:** [@Bassam](https://discourse.slicer.org/u/Bassam)\
**Replies:** 1\
**Last updated:** [September 1, 2021, 6:06pm UTC](https://discourse.slicer.org/t/calculating-consolidation-volume-in-ct-lung/19386 "2021-09-01T18:06:10Z")

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Hi team of 3D slicer, Kindly, I would like to know if there is any extension in the 3D slicer which could be used for measuring the average density (i.e., HU) of lung consolidation in non-contract CT Lung ?

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## [Nvidia AI-assisted segmentation extension](https://discourse.slicer.org/t/nvidia-ai-assisted-segmentation-extension/19454)

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**Author:** [@Klakla](https://discourse.slicer.org/u/Klakla)\
**Replies:** 1\
**Last updated:** [September 1, 2021, 5:17pm UTC](https://discourse.slicer.org/t/nvidia-ai-assisted-segmentation-extension/19454 "2021-09-01T17:17:45Z")

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HI. I just downloaded 3Dlicer 4.11.2021 and I want to download the Nvidia AI-assisted segmentation extension, but when I opened the extensions page I didn’t find it. Please I need help

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## [Adding widget above or below the toolbar](https://discourse.slicer.org/t/adding-widget-above-or-below-the-toolbar/19464)

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**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 2\
**Last updated:** [September 1, 2021, 4:55pm UTC](https://discourse.slicer.org/t/adding-widget-above-or-below-the-toolbar/19464 "2021-09-01T16:55:20Z")

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I am running a custom python script with slicer main window. And I want to add a widget or layout between above or below the toolbar.

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## [Slicer pip package installation error](https://discourse.slicer.org/t/slicer-pip-package-installation-error/19453)

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**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 1\
**Last updated:** [September 1, 2021, 11:35am UTC](https://discourse.slicer.org/t/slicer-pip-package-installation-error/19453 "2021-09-01T11:35:48Z")

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When I am tryin to install packagers in python-interactor in Slicer, it giving AttributeError.

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## [Voxel-based radiomics crash](https://discourse.slicer.org/t/voxel-based-radiomics-crash/19385)

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**Author:** [@Guglielmo\_Baccani](https://discourse.slicer.org/u/Guglielmo_Baccani)\
**Replies:** 1\
**Last updated:** [September 1, 2021, 4:36am UTC](https://discourse.slicer.org/t/voxel-based-radiomics-crash/19385 "2021-09-01T04:36:33Z")

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Hi everyone, I would like extract voxel-based features from a CT volume within a labelmap. I am able to extract segment-based feature but when when I try to compute voxel-based ones 3D Slicer crashes. To reproduce the…

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