# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?no_subcategories=false&page=92

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

**Page:** 93

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## [I have a centerline and Can I have a endoscopy with it](https://discourse.slicer.org/t/i-have-a-centerline-and-can-i-have-a-endoscopy-with-it/5357)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 13\
**Last updated:** [June 15, 2020, 6:03pm UTC](https://discourse.slicer.org/t/i-have-a-centerline-and-can-i-have-a-endoscopy-with-it/5357 "2020-06-15T18:03:55Z")

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I have a centerline and Can I get a endoscopy with it.

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## [vicon bonita and canon xario200g](https://discourse.slicer.org/t/vicon-bonita-and-canon-xario200g/12042)

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**Author:** [@Ylim](https://discourse.slicer.org/u/Ylim)\
**Replies:** 0\
**Last updated:** [June 15, 2020, 5:57pm UTC](https://discourse.slicer.org/t/vicon-bonita-and-canon-xario200g/12042 "2020-06-15T17:57:44Z")

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I posted something similar here before. We have a vicon bonita and a xario 200g. Would like to find out what would be the best way to use slicer plus with the two equipment to do freehand 3d ultrasound. thanks.

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## [Is it possible to create a Model Node with 2 cylinders?](https://discourse.slicer.org/t/is-it-possible-to-create-a-model-node-with-2-cylinders/12002)

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**Author:** [@Pablo\_Javier](https://discourse.slicer.org/u/Pablo_Javier)\
**Replies:** 4\
**Last updated:** [June 12, 2020, 11:09pm UTC](https://discourse.slicer.org/t/is-it-possible-to-create-a-model-node-with-2-cylinders/12002 "2020-06-12T23:09:50Z")

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I want to create a model node which includes two or more cylinders. Is that possible ?( I don´t want a node per cylinder)

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## [Add a button to switch to another module](https://discourse.slicer.org/t/add-a-button-to-switch-to-another-module/12004)

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**Author:** [@apparrilla](https://discourse.slicer.org/u/apparrilla)\
**Replies:** 1\
**Last updated:** [June 12, 2020, 7:50pm UTC](https://discourse.slicer.org/t/add-a-button-to-switch-to-another-module/12004 "2020-06-12T19:50:38Z")

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I should like to add to my ScriptedLoadableModule a button to jump to another ScriptedLoadableModule. I´ve been looking for reference in forum and ScriptRepository but … Thanks on advance…

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## [Switching to .json for Markup files: any convergence with BIDS?](https://discourse.slicer.org/t/switching-to-json-for-markup-files-any-convergence-with-bids/11997)

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**Author:** [@jclauneuro](https://discourse.slicer.org/u/jclauneuro)\
**Replies:** 2\
**Last updated:** [June 12, 2020, 5:17pm UTC](https://discourse.slicer.org/t/switching-to-json-for-markup-files-any-convergence-with-bids/11997 "2020-06-12T17:17:37Z")

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This is a continuation of discussion from the following thread MarkupsLine .fcsv loads as MarkupsFiducials @lassoan brought up the consideration of switching to .json for handling Markup files in Slicer5. I think the si…

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## [modify STL files](https://discourse.slicer.org/t/modify-stl-files/11979)

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**Author:** [@jtwalther](https://discourse.slicer.org/u/jtwalther)\
**Replies:** 4\
**Last updated:** [June 12, 2020, 4:39pm UTC](https://discourse.slicer.org/t/modify-stl-files/11979 "2020-06-12T16:39:24Z")

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Hi all, I am pretty new to Slicer so I am not sure about all the functionality. I want do develop an extension so that I can load an STL file (which was created with Blender) into slicer, modify some parameters such as …

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## [Loading DICOM files](https://discourse.slicer.org/t/loading-dicom-files/11995)

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**Author:** [@nsbosse](https://discourse.slicer.org/u/nsbosse)\
**Replies:** 4\
**Last updated:** [June 12, 2020, 3:11pm UTC](https://discourse.slicer.org/t/loading-dicom-files/11995 "2020-06-12T15:11:09Z")

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Hi there, I have a few questions regarding the process for loading DICOM files. Does Slicer’s DICOM reader apply the rescale slope/intercept prior to loading the intensity values into memory? What is the fallback strate…

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## [Best way to delete nodes](https://discourse.slicer.org/t/best-way-to-delete-nodes/11990)

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**Author:** [@siaeleni](https://discourse.slicer.org/u/siaeleni)\
**Replies:** 3\
**Last updated:** [June 11, 2020, 4:41pm UTC](https://discourse.slicer.org/t/best-way-to-delete-nodes/11990 "2020-06-11T16:41:43Z")

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Hi, I apply some filters to my data (eg.BinaryMorphologicalOpeningImageFilter) and at the end I remove all unnecessary nodes from the scene (label maps/segmentation nodes) that were created in the meantime. Right after …

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## [Change MarkupsCurve color programmatically](https://discourse.slicer.org/t/change-markupscurve-color-programmatically/11978)

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**Author:** [@RafaelPalomar](https://discourse.slicer.org/u/RafaelPalomar)\
**Replies:** 2\
**Last updated:** [June 10, 2020, 3:55pm UTC](https://discourse.slicer.org/t/change-markupscurve-color-programmatically/11978 "2020-06-10T15:55:42Z")

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Hello. I’m trying to change the color of curve markups programmatically. The following snippet does not seem to work (color remains unchanged) and does not produce any error: markupNode = getNode('MarkupsCurve') displa…

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## [Share a GUI based on QT](https://discourse.slicer.org/t/share-a-gui-based-on-qt/11954)

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**Author:** [@Fabi-LiU](https://discourse.slicer.org/u/Fabi-LiU)\
**Replies:** 2\
**Last updated:** [June 9, 2020, 5:45pm UTC](https://discourse.slicer.org/t/share-a-gui-based-on-qt/11954 "2020-06-09T17:45:23Z")

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Hi, I made a graphical user interface using Qtdesigner and a python code to run the ui files. The GUI is planed to be used by researchers in the field of deep brain stimulation (including neurosurgeons and neurologists…

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## [Import Dicom Files with DICOM RT files](https://discourse.slicer.org/t/import-dicom-files-with-dicom-rt-files/11964)

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**Author:** [@loubna](https://discourse.slicer.org/u/loubna)\
**Replies:** 1\
**Last updated:** [June 9, 2020, 5:33pm UTC](https://discourse.slicer.org/t/import-dicom-files-with-dicom-rt-files/11964 "2020-06-09T17:33:56Z")

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Hi; I am trying to develop a python script in order to import spectroscopy and metabolite data. However when I import the dicom file with SlicerRT structures, I have got an error “DICOM Plugin failed: Dataset does not h…

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## [Create curve tree interactively?](https://discourse.slicer.org/t/create-curve-tree-interactively/11955)

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**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 3\
**Last updated:** [June 9, 2020, 4:10pm UTC](https://discourse.slicer.org/t/create-curve-tree-interactively/11955 "2020-06-09T16:10:04Z")

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This question is probably specifically for Andras (@lassoan), but someone else might know how to do this. Your video on centerline extraction and tree creation is awesome, but I was wondering if there is a way to intera…

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## [Using resampling cli in python script](https://discourse.slicer.org/t/using-resampling-cli-in-python-script/11918)

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**Author:** [@1116](https://discourse.slicer.org/u/1116)\
**Replies:** 3\
**Last updated:** [June 9, 2020, 12:46pm UTC](https://discourse.slicer.org/t/using-resampling-cli-in-python-script/11918 "2020-06-09T12:46:18Z")

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I’m new with 3d slicer cli, using this code , I get a volume with Image dimensions (0,0,0) please tell me what’s wrong with this code thank you!

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## [Crash when emitting PythonQt.Signal](https://discourse.slicer.org/t/crash-when-emitting-pythonqt-signal/11861)

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**Author:** [@Felipe\_Silveira](https://discourse.slicer.org/u/Felipe_Silveira)\
**Replies:** 2\
**Last updated:** [June 9, 2020, 12:19pm UTC](https://discourse.slicer.org/t/crash-when-emitting-pythonqt-signal/11861 "2020-06-09T12:19:34Z")

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Hi, I have some qt widgets that have some extra callbacks as signals, but I have a crash every time that I call emit. I have this problem with the latest stable and also the nightly build from a few days ago. The repro …

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## [Sharing .exe file with a friend](https://discourse.slicer.org/t/sharing-exe-file-with-a-friend/11936)

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**Author:** [@sheharyar\_anwar](https://discourse.slicer.org/u/sheharyar_anwar)\
**Replies:** 2\
**Last updated:** [June 9, 2020, 10:41am UTC](https://discourse.slicer.org/t/sharing-exe-file-with-a-friend/11936 "2020-06-09T10:41:45Z")

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I have built 3D slicer using the source code, now I want to share the built .exe file with a friend so that he could run it on his computer. Would you suggest any way to do this?

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## [Place fiducial every n seconds](https://discourse.slicer.org/t/place-fiducial-every-n-seconds/11764)

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**Author:** [@mms25](https://discourse.slicer.org/u/mms25)\
**Replies:** 2\
**Last updated:** [June 8, 2020, 9:13pm UTC](https://discourse.slicer.org/t/place-fiducial-every-n-seconds/11764 "2020-06-08T21:13:28Z")

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Hi, I am new to programming in 3D slicer. I am trying to place a fiducial at the tip of the pointer tool every five seconds. I have tried using the timer function but it doesn’t seem to work. This is the code I am using: …

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## [SegmentEditorWidget not adding more than one effect](https://discourse.slicer.org/t/segmenteditorwidget-not-adding-more-than-one-effect/11932)

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**Author:** [@Queen\_Rei](https://discourse.slicer.org/u/Queen_Rei)\
**Replies:** 1\
**Last updated:** [June 8, 2020, 9:07pm UTC](https://discourse.slicer.org/t/segmenteditorwidget-not-adding-more-than-one-effect/11932 "2020-06-08T21:07:05Z")

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I tried to add a threshold, open, and close smoothing effect in my module, but it’s only doing the thresholding. Is there something I am doing wrong? Do you need any more info? Thank you and hope you and your family/f…

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## [Build Slicer with ubuntu 20.04, Qt5.15, cmake 3.17.3](https://discourse.slicer.org/t/build-slicer-with-ubuntu-20-04-qt5-15-cmake-3-17-3/11925)

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**Author:** [@Davide\_Punzo](https://discourse.slicer.org/u/Davide_Punzo)\
**Replies:** 3\
**Last updated:** [June 8, 2020, 3:17pm UTC](https://discourse.slicer.org/t/build-slicer-with-ubuntu-20-04-qt5-15-cmake-3-17-3/11925 "2020-06-08T15:17:57Z")

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Hi guys, I managed to build latest Slicer on ubuntu 20.04, Qt5.15, cmake 3.17.3, gcc 9.3.0, but I had two minor issues: I had to set Slicer\_USE\_PYTHONQT\_WITH\_OPENSSL = OFF (Slicer was crashing in line Slicer/qSlicerC…

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## [GUI sphere paint segmentation](https://discourse.slicer.org/t/gui-sphere-paint-segmentation/11924)

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**Author:** [@szhang](https://discourse.slicer.org/u/szhang)\
**Replies:** 1\
**Last updated:** [June 8, 2020, 2:18pm UTC](https://discourse.slicer.org/t/gui-sphere-paint-segmentation/11924 "2020-06-08T14:18:49Z")

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It probably has been asked before, but in case I missed any latest development. If I want to include in my module a GUI component for segmentation (e.g. via sphere paint) as easy as creating a fiducial markup like qSlic…

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## [Ubuntu 18.04,Slicer 4.10.2, build error](https://discourse.slicer.org/t/ubuntu-18-04-slicer-4-10-2-build-error/11888)

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**Author:** [@leemoncn](https://discourse.slicer.org/u/leemoncn)\
**Replies:** 3\
**Last updated:** [June 6, 2020, 5:39am UTC](https://discourse.slicer.org/t/ubuntu-18-04-slicer-4-10-2-build-error/11888 "2020-06-06T05:39:48Z")

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On unbuntu 18.04, i build Slicer 4.10.2 from source code, it shows error: ‘/home/biso/Slicer-SuperBuild-Release/python-install/bin/PythonSlicer’ ‘setup.py’ ‘install’ error: Failed to obtain launcher executable name !

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## [How to get the triangle ID on 3D view (mesh) from mouse coordinates in slice view](https://discourse.slicer.org/t/how-to-get-the-triangle-id-on-3d-view-mesh-from-mouse-coordinates-in-slice-view/11883)

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**Author:** [@loubna](https://discourse.slicer.org/u/loubna)\
**Replies:** 1\
**Last updated:** [June 5, 2020, 4:30pm UTC](https://discourse.slicer.org/t/how-to-get-the-triangle-id-on-3d-view-mesh-from-mouse-coordinates-in-slice-view/11883 "2020-06-05T16:30:34Z")

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Hi; I want to know if is it possible to obtain the triangle ID (the closest one) when I click on a segmented area in 2D slice view? Can you give me some examples or classes to that in c++. thank’s in advance

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## [Configuration of active color of vtkSlicerMarkupsWidgetRepresentation](https://discourse.slicer.org/t/configuration-of-active-color-of-vtkslicermarkupswidgetrepresentation/11858)

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**Author:** [@Fangwen\_Zhai](https://discourse.slicer.org/u/Fangwen_Zhai)\
**Replies:** 2\
**Last updated:** [June 5, 2020, 2:58am UTC](https://discourse.slicer.org/t/configuration-of-active-color-of-vtkslicermarkupswidgetrepresentation/11858 "2020-06-05T02:58:50Z")

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In the current implementation of vtkSlicerMarkupsWidgetRepresentation, active and invalid colors are hard coded as gray and bright green respectively. Since the selected and unselected colors of control points can be con…

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## [GetDisplayNode returns 'NoneType' after I create manually a Node](https://discourse.slicer.org/t/getdisplaynode-returns-nonetype-after-i-create-manually-a-node/11863)

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**Author:** [@siaeleni](https://discourse.slicer.org/u/siaeleni)\
**Replies:** 1\
**Last updated:** [June 4, 2020, 5:02pm UTC](https://discourse.slicer.org/t/getdisplaynode-returns-nonetype-after-i-create-manually-a-node/11863 "2020-06-04T17:02:53Z")

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Hi All, I create a qMRMLNodeComboBox using following code: self.outputSelector = slicer.qMRMLNodeComboBox() self.outputSelector.nodeTypes = \["vtkMRMLModelNode"\] self.outputSelector.selectNodeUponCreation = True self.o…

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## [Rendering bug with non-simple polygons](https://discourse.slicer.org/t/rendering-bug-with-non-simple-polygons/11848)

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**Author:** [@gcsharp](https://discourse.slicer.org/u/gcsharp)\
**Replies:** 2\
**Last updated:** [June 3, 2020, 6:16pm UTC](https://discourse.slicer.org/t/rendering-bug-with-non-simple-polygons/11848 "2020-06-03T18:16:20Z")

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I’ve noticed this before, but never had time to investigate. Anyway when an RTSTRUCT has non-simple (self-intersecting) polygons, it does not render correctly in slice view. Should I file a bug report?

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## [Slicer Based GUI development/implementation c++](https://discourse.slicer.org/t/slicer-based-gui-development-implementation-c/11687)

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**Author:** [@Cesar\_Puga](https://discourse.slicer.org/u/Cesar_Puga)\
**Replies:** 5\
**Last updated:** [June 3, 2020, 4:20pm UTC](https://discourse.slicer.org/t/slicer-based-gui-development-implementation-c/11687 "2020-06-03T16:20:08Z")

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Hello Everyone, i have been researching through this forums during the past few weeks as i am currently working on my master thesis, my goal is to implement a GUI that achieves the following: -display a volume based on …

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## [vtkActor management](https://discourse.slicer.org/t/vtkactor-management/11839)

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**Author:** [@Eloi\_gbrt](https://discourse.slicer.org/u/Eloi_gbrt)\
**Replies:** 4\
**Last updated:** [June 2, 2020, 10:36pm UTC](https://discourse.slicer.org/t/vtkactor-management/11839 "2020-06-02T22:36:29Z")

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Hi everybody, I’m trying to create a python module which permits to display an image and different other features for a VR project purpose. To achieve this goal i decided to code functions creating the vtkActor(s) that …

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## [Create, invoke and observe vtk custom event](https://discourse.slicer.org/t/create-invoke-and-observe-vtk-custom-event/11794)

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**Author:** [@PaoloZaffino](https://discourse.slicer.org/u/PaoloZaffino)\
**Replies:** 14\
**Last updated:** [June 1, 2020, 9:23pm UTC](https://discourse.slicer.org/t/create-invoke-and-observe-vtk-custom-event/11794 "2020-06-01T21:23:34Z")

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Hi all, I’m using the function SetParameter() of a vtkMRMLScriptedModuleNode object. From a different class I observe that node and I run a function if the parameter changes…all run smoothly right so far, since I have …

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## [Vtk transform matrix as python list/tuple array](https://discourse.slicer.org/t/vtk-transform-matrix-as-python-list-tuple-array/11797)

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**Author:** [@talmazov](https://discourse.slicer.org/u/talmazov)\
**Replies:** 3\
**Last updated:** [May 31, 2020, 3:19pm UTC](https://discourse.slicer.org/t/vtk-transform-matrix-as-python-list-tuple-array/11797 "2020-05-31T15:19:16Z")

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Hey, I have a model object i am exporting to PLY then trying to obtain its transform node as python list/tuple I am doing this in my script my\_matrix = transform.GetMatrixTransformFromParent() matrix\_Array = my\_matr…

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## [The impact of image spacing on the quality of 3D reconstruction](https://discourse.slicer.org/t/the-impact-of-image-spacing-on-the-quality-of-3d-reconstruction/11793)

<div class="topic-metadata">

**Author:** [@loubna](https://discourse.slicer.org/u/loubna)\
**Replies:** 1\
**Last updated:** [May 31, 2020, 1:08am UTC](https://discourse.slicer.org/t/the-impact-of-image-spacing-on-the-quality-of-3d-reconstruction/11793 "2020-05-31T01:08:19Z")

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Hi; I understand that this can be a very basic VTK image processing question. But, I would know what is the imapct of SetSpacing values in 3D image using vtkImageData on the quality of reconstructed model. The default v…

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## [dose mapping with series of png image containing ct and dose integreted](https://discourse.slicer.org/t/dose-mapping-with-series-of-png-image-containing-ct-and-dose-integreted/11785)

<div class="topic-metadata">

**Author:** [@ASHISH\_KUMAR](https://discourse.slicer.org/u/ASHISH_KUMAR)\
**Replies:** 2\
**Last updated:** [May 30, 2020, 5:27am UTC](https://discourse.slicer.org/t/dose-mapping-with-series-of-png-image-containing-ct-and-dose-integreted/11785 "2020-05-30T05:27:31Z")

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How to do dose mapping with a series of png images containing ct and dose integrated through customized slicer 3d?

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