# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=316

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

**Page:** 317

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## [slicer.util.MRMLNodeNotFoundException: could not find nodes in the scene by name or id '' error](https://discourse.slicer.org/t/slicer-util-mrmlnodenotfoundexception-could-not-find-nodes-in-the-scene-by-name-or-id-error/14135)

<div class="topic-metadata">

**Author:** [@marianaslicer](https://discourse.slicer.org/u/marianaslicer)\
**Replies:** 3\
**Last updated:** [October 19, 2020, 1:55pm UTC](https://discourse.slicer.org/t/slicer-util-mrmlnodenotfoundexception-could-not-find-nodes-in-the-scene-by-name-or-id-error/14135 "2020-10-19T13:55:33Z")

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Operating system: windows 10 Slicer version: 4.11.20200930 Expected behavior: run a scripted python module without errors Hello. I’m using a scripted python module on 3D slicer version 4.4 and it works as it should. …

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## [Rename of the series](https://discourse.slicer.org/t/rename-of-the-series/14123)

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**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Replies:** 1\
**Last updated:** [October 19, 2020, 10:51am UTC](https://discourse.slicer.org/t/rename-of-the-series/14123 "2020-10-19T10:51:31Z")

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Hello everyone, is there a way to change the name of the series, for example B: 7: unnamed Series\_2 (see photo)? After editing, I would like to assign a unique name to the segmented data record in order to avoid confusi…

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## [Threshold and hounsfield unit inclusion](https://discourse.slicer.org/t/threshold-and-hounsfield-unit-inclusion/14044)

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**Author:** [@S\_Jo](https://discourse.slicer.org/u/S_Jo)\
**Replies:** 2\
**Last updated:** [October 19, 2020, 1:24am UTC](https://discourse.slicer.org/t/threshold-and-hounsfield-unit-inclusion/14044 "2020-10-19T01:24:31Z")

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Operating system: Windows 10 Slicer version: 4.1.1. Hello, I am using threshold method to measure ROI. A question came up if the threshold is set at -30, is -30 included or does the inclusion of values start from -29…

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## [Labeling of the measurement results](https://discourse.slicer.org/t/labeling-of-the-measurement-results/14124)

<div class="topic-metadata">

**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Replies:** 1\
**Last updated:** [October 18, 2020, 9:10pm UTC](https://discourse.slicer.org/t/labeling-of-the-measurement-results/14124 "2020-10-18T21:10:57Z")

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Hello everybody, how can the labeling of the measurement results be better and clearly legible? The rows of numbers should not be shifted into one another and should also be displayed in a smaller format. (Image 1) I…

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## [Upload single images in the three different axes](https://discourse.slicer.org/t/upload-single-images-in-the-three-different-axes/14116)

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**Author:** [@gnigni](https://discourse.slicer.org/u/gnigni)\
**Replies:** 1\
**Last updated:** [October 18, 2020, 7:29pm UTC](https://discourse.slicer.org/t/upload-single-images-in-the-three-different-axes/14116 "2020-10-18T19:29:04Z")

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Operating system: windows 10 Slicer version: 4.11 Expected behavior: i’d like to be able to upload and assign images to different axes Actual behavior: all images are assigned automatically to axis I have a sets of …

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## [Issue with the Hollow command when exported in GMSH](https://discourse.slicer.org/t/issue-with-the-hollow-command-when-exported-in-gmsh/14121)

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**Author:** [@nmirzaei](https://discourse.slicer.org/u/nmirzaei)\
**Replies:** 1\
**Last updated:** [October 18, 2020, 7:14pm UTC](https://discourse.slicer.org/t/issue-with-the-hollow-command-when-exported-in-gmsh/14121 "2020-10-18T19:14:42Z")

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Hi, I have an issue when I want to re-mesh a hollowed out colon section with GMSH. I used the hollow button in Slicer and it created a hollowed colon section with two boundary surfaces. I need to save this as .stl with …

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## [Inline documentation link issues in Help tab](https://discourse.slicer.org/t/inline-documentation-link-issues-in-help-tab/14118)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 0\
**Last updated:** [October 18, 2020, 4:20pm UTC](https://discourse.slicer.org/t/inline-documentation-link-issues-in-help-tab/14118 "2020-10-18T16:20:24Z")

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With the move to readthedocs from Wiki, what is the plan for inline help? Currently links to readthedocs are either broken (e.g., Markups, Data) or goes back to Wiki (Volume Rendering) in the current stable.

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## [How to use signals and slots in Slicer 3d?](https://discourse.slicer.org/t/how-to-use-signals-and-slots-in-slicer-3d/14013)

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**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 5\
**Last updated:** [October 18, 2020, 3:18pm UTC](https://discourse.slicer.org/t/how-to-use-signals-and-slots-in-slicer-3d/14013 "2020-10-18T15:18:00Z")

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I am familiar with pyqt. I want to use signals and slots mechanism in my slicer python script. For some reason when I am connecting the signal to the slot, slicer is exiting abnormally. How to use signals and slots …

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## [make segmentation labelmap from markupsclosedcurve](https://discourse.slicer.org/t/make-segmentation-labelmap-from-markupsclosedcurve/14103)

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**Author:** [@doebow](https://discourse.slicer.org/u/doebow)\
**Replies:** 0\
**Last updated:** [October 17, 2020, 6:33pm UTC](https://discourse.slicer.org/t/make-segmentation-labelmap-from-markupsclosedcurve/14103 "2020-10-17T18:33:17Z")

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slicer version: 4.11.10 I’m trying to make a binary label mask from a closed curve markup. Here is my code curves=slicer.util.getNodesByClass(“vtkMRMLMarkupsClosedCurveNode”) areaMm2 = slicer.modules.markups.logic().G…

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## [Green horizontal lines appear in Slicer-4.10.2 at startup](https://discourse.slicer.org/t/green-horizontal-lines-appear-in-slicer-4-10-2-at-startup/12090)

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**Author:** [@calvin.kohwy](https://discourse.slicer.org/u/calvin.kohwy)\
**Replies:** 7\
**Last updated:** [October 17, 2020, 12:06pm UTC](https://discourse.slicer.org/t/green-horizontal-lines-appear-in-slicer-4-10-2-at-startup/12090 "2020-10-17T12:06:49Z")

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Operating system: Windows 10 i7 Slicer version: 4.10.2 Hi all I have been using slicer with my pc for quite sometime. However, out of the blue, the following happen to my slicer as shown in the image below. I had tri…

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## [Downsampling NRRDs](https://discourse.slicer.org/t/downsampling-nrrds/14033)

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**Author:** [@Christopher\_Pinto](https://discourse.slicer.org/u/Christopher_Pinto)\
**Replies:** 16\
**Last updated:** [October 17, 2020, 2:09am UTC](https://discourse.slicer.org/t/downsampling-nrrds/14033 "2020-10-17T02:09:29Z")

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What is the best way to make my NRRDs more lightweight? I tried using the Brain Resampling module, but its very temperamental and only works on a few occasions. I have files on the 3-4MB size that need to be around 10-20…

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## [Post segmentation results](https://discourse.slicer.org/t/post-segmentation-results/14091)

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**Author:** [@sarvpriya1985](https://discourse.slicer.org/u/sarvpriya1985)\
**Replies:** 2\
**Last updated:** [October 17, 2020, 1:57am UTC](https://discourse.slicer.org/t/post-segmentation-results/14091 "2020-10-17T01:57:20Z")

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Hi, I am facing an issue in segmentation that i is quite weird. Not sure what is going wrong. I segmented cervical vessels and after growing from seeds, I am getting some blobs only but not full volume. I did this three…

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## [Extension "Radiomics" does not work in Slicer version 4.13.0 on MacBook](https://discourse.slicer.org/t/extension-radiomics-does-not-work-in-slicer-version-4-13-0-on-macbook/14088)

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**Author:** [@iboeth](https://discourse.slicer.org/u/iboeth)\
**Replies:** 2\
**Last updated:** [October 16, 2020, 10:32pm UTC](https://discourse.slicer.org/t/extension-radiomics-does-not-work-in-slicer-version-4-13-0-on-macbook/14088 "2020-10-16T22:32:28Z")

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Operating system: MacOSCatalina Version 10.15.7 Slicer version: 4.13.0-2020-10-15 Expected behavior: Download Radiomics-Extension Actual behavior: Please excuse my basic question. I tried to install Radiomics-Extens…

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## [Element sizes in segmentmesher](https://discourse.slicer.org/t/element-sizes-in-segmentmesher/14083)

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**Author:** [@Aep93](https://discourse.slicer.org/u/Aep93)\
**Replies:** 0\
**Last updated:** [October 16, 2020, 5:14pm UTC](https://discourse.slicer.org/t/element-sizes-in-segmentmesher/14083 "2020-10-16T17:14:01Z")

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Hello all, I am using the segmentmesher to create a volumetric mesh. However, the generated meshes do not look fine to me; at some parts the mesh is coarse and at some parts, it is very fine. I tried to play with segmen…

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## [Segmentation w/ Scissors Tool](https://discourse.slicer.org/t/segmentation-w-scissors-tool/14069)

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**Author:** [@Ryanjjohnson17](https://discourse.slicer.org/u/Ryanjjohnson17)\
**Replies:** 2\
**Last updated:** [October 16, 2020, 3:13pm UTC](https://discourse.slicer.org/t/segmentation-w-scissors-tool/14069 "2020-10-16T15:13:56Z")

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Operating system: macOS Catalina 10.15.6 Slicer version: 4.10.2 Expected behavior: Use scissors tool to segment abdominal aorta model into multiple pieces for later printing Actual behavior: Nothing happens when I use…

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## [Paint mode in segment editor works incorrect](https://discourse.slicer.org/t/paint-mode-in-segment-editor-works-incorrect/14070)

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**Author:** [@jarrik](https://discourse.slicer.org/u/jarrik)\
**Replies:** 2\
**Last updated:** [October 16, 2020, 10:55am UTC](https://discourse.slicer.org/t/paint-mode-in-segment-editor-works-incorrect/14070 "2020-10-16T10:55:22Z")

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Hello! I work with Slicer 4.11.0 , win10 The problem is: In Segment Editor Paint mode modify several slices together (see photo). If it is not an error, I would like to know, how to deny such modifications. In my work …

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## [Change size and color of markups fiducials](https://discourse.slicer.org/t/change-size-and-color-of-markups-fiducials/14063)

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**Author:** [@jj31](https://discourse.slicer.org/u/jj31)\
**Replies:** 1\
**Last updated:** [October 15, 2020, 11:39pm UTC](https://discourse.slicer.org/t/change-size-and-color-of-markups-fiducials/14063 "2020-10-15T23:39:00Z")

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I’m loading a list of fiducials programmatically using: slicer.util.loadMarkupsFiducialList(file.fcsv) Then, I’m trying to change their color and size using the following: defaultMarkupsFiducialDisplayNode = slicer.vt…

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## [Segmentation issue](https://discourse.slicer.org/t/segmentation-issue/14032)

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**Author:** [@Carl\_Slicer](https://discourse.slicer.org/u/Carl_Slicer)\
**Replies:** 2\
**Last updated:** [October 15, 2020, 4:31pm UTC](https://discourse.slicer.org/t/segmentation-issue/14032 "2020-10-15T16:31:18Z")

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Operating system: Windows 10 Slicer version: 4.1120200903 Expected behavior: segmentation Actual behavior: I have a CT scan with contrast. The scanning has been performed as a bolus tracking scan to maximize interate…

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## [Slicer Morph is missing](https://discourse.slicer.org/t/slicer-morph-is-missing/14054)

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**Author:** [@zeliair](https://discourse.slicer.org/u/zeliair)\
**Replies:** 1\
**Last updated:** [October 15, 2020, 2:29pm UTC](https://discourse.slicer.org/t/slicer-morph-is-missing/14054 "2020-10-15T14:29:12Z")

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Hello, i want to use Slicer Morph but it is not appearing either in Version 10.2 or 11.0. It’s supposed to be above “Wizards”, but I can’t find it. Does someone know what might be the problem? Thank you !

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## [Python Interactor colors](https://discourse.slicer.org/t/python-interactor-colors/14053)

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**Author:** [@Niels](https://discourse.slicer.org/u/Niels)\
**Replies:** 5\
**Last updated:** [October 15, 2020, 1:49pm UTC](https://discourse.slicer.org/t/python-interactor-colors/14053 "2020-10-15T13:49:00Z")

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Hello, I just installed the latest stable version on my MacBook and I noticed that the colors in the interaction are different. The Error messages are printed in white so they are not visible. MAC version 4.11.2020093…

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## [Unable to visualise 3D of bone](https://discourse.slicer.org/t/unable-to-visualise-3d-of-bone/13999)

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**Author:** [@celinechoy](https://discourse.slicer.org/u/celinechoy)\
**Replies:** 4\
**Last updated:** [October 15, 2020, 12:23pm UTC](https://discourse.slicer.org/t/unable-to-visualise-3d-of-bone/13999 "2020-10-15T12:23:22Z")

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I am unable to visualise 3D of bone. I have chosen CTAA2 and the soft tissue us covering up the bone as shown in right upper panel. Please advice. Operating system: Slicer version: Expected behavior: Actual behav…

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## [Volume representation without noise and garbage](https://discourse.slicer.org/t/volume-representation-without-noise-and-garbage/14046)

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**Author:** [@a10227](https://discourse.slicer.org/u/a10227)\
**Replies:** 2\
**Last updated:** [October 15, 2020, 10:22am UTC](https://discourse.slicer.org/t/volume-representation-without-noise-and-garbage/14046 "2020-10-15T10:22:39Z")

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Good day, I have dicom images and when I render them I see a 3D model without any noise, but the thing is, it is only because of the visualization presets, when I change some values on the “scalar opacity maping” widget…

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## [3D slicer's segmented output for convolutional neural network training ](https://discourse.slicer.org/t/3d-slicers-segmented-output-for-convolutional-neural-network-training/14000)

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**Author:** [@Abdulrahman](https://discourse.slicer.org/u/Abdulrahman)\
**Replies:** 6\
**Last updated:** [October 15, 2020, 5:25am UTC](https://discourse.slicer.org/t/3d-slicers-segmented-output-for-convolutional-neural-network-training/14000 "2020-10-15T05:25:44Z")

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Hi all, I’m working on the field of brain segmentation using convolutional neural network CNN. I have already segmented the brain regions on Slicer, so now I want to export the input images(DICOM) and its corresponding …

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## [How to create a new signal and bind it to a slot in slicer3d?](https://discourse.slicer.org/t/how-to-create-a-new-signal-and-bind-it-to-a-slot-in-slicer3d/14035)

<div class="topic-metadata">

**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 0\
**Last updated:** [October 14, 2020, 2:23pm UTC](https://discourse.slicer.org/t/how-to-create-a-new-signal-and-bind-it-to-a-slot-in-slicer3d/14035 "2020-10-14T14:23:37Z")

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When I am executing the above code slicer is exiting abnormally. How can I create a new signal in slicer that works fine?

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## [Unable to visualise 3D of bone. Has soft tissue around the bone](https://discourse.slicer.org/t/unable-to-visualise-3d-of-bone-has-soft-tissue-around-the-bone/14048)

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**Author:** [@celinechoy](https://discourse.slicer.org/u/celinechoy)\
**Replies:** 0\
**Last updated:** [October 15, 2020, 1:43am UTC](https://discourse.slicer.org/t/unable-to-visualise-3d-of-bone-has-soft-tissue-around-the-bone/14048 "2020-10-15T01:43:26Z")

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May I have an urgent help? I loaded the DICOM files and I have changed the setting to CT bone and adjusted the slicer to get the bone visualization. My main focus is on the cervical bone. However, the soft tissues aro…

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## [Slicer 4.13 usability on Linux : do we have a timeline?](https://discourse.slicer.org/t/slicer-4-13-usability-on-linux-do-we-have-a-timeline/14040)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 1\
**Last updated:** [October 14, 2020, 11:14pm UTC](https://discourse.slicer.org/t/slicer-4-13-usability-on-linux-do-we-have-a-timeline/14040 "2020-10-14T23:14:00Z")

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Slicer 4.13 (5c50be61c) with VTK9 (a889f4730) does not show anything in 2D views on Linux. It’s a known issue. I just wish to know in what delay can we expect a usable 4.13 on Linux ? Thanks.

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## [Different wall thickness](https://discourse.slicer.org/t/different-wall-thickness/14018)

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**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Replies:** 5\
**Last updated:** [October 14, 2020, 9:47pm UTC](https://discourse.slicer.org/t/different-wall-thickness/14018 "2020-10-14T21:47:06Z")

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Hello all, when measuring my vessel models, I noticed that the wall thickness deviates significantly from the nominal thickness, for example if I want to print a vessel with a wall thickness of 0.5mm , I sometimes have …

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## [SliceTracker module cannot be loaded on Slicer 4.11.20200930](https://discourse.slicer.org/t/slicetracker-module-cannot-be-loaded-on-slicer-4-11-20200930/13895)

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**Author:** [@tokjun](https://discourse.slicer.org/u/tokjun)\
**Replies:** 8\
**Last updated:** [October 14, 2020, 1:59pm UTC](https://discourse.slicer.org/t/slicetracker-module-cannot-be-loaded-on-slicer-4-11-20200930/13895 "2020-10-14T13:59:31Z")

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Hi, I am trying to use SliceTracker on the new Slicer release (4.11.20200930 Stable Release), but the Slicer fails to load the module (see the error message below). I’m wondering if anyone is facing the same issue. I’m …

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## [Place fiducial behavior in 4.11 stable - change from previous version](https://discourse.slicer.org/t/place-fiducial-behavior-in-4-11-stable-change-from-previous-version/14020)

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**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 4\
**Last updated:** [October 13, 2020, 10:04pm UTC](https://discourse.slicer.org/t/place-fiducial-behavior-in-4-11-stable-change-from-previous-version/14020 "2020-10-13T22:04:29Z")

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I did a quick search through past posts on fiducials (wow, there are a lot) but didn’t see this mentioned - apologies if I missed something. In previous versions (as recent as 9-1 nightly, for example), after placing a …

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## [Landmark registration malfunction](https://discourse.slicer.org/t/landmark-registration-malfunction/14016)

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**Author:** [@nvanvuren](https://discourse.slicer.org/u/nvanvuren)\
**Replies:** 0\
**Last updated:** [October 13, 2020, 4:10pm UTC](https://discourse.slicer.org/t/landmark-registration-malfunction/14016 "2020-10-13T16:10:43Z")

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Hello, I am using the Landmark Registration module to perform registration of a post mortem ex vivo hemisphere on MRI on a normal brain MRI atlas to correct for the distortion that occurs due to absence of the skull in …

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