# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=246

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

**Page:** 247

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## [2 Images in Oculus Ques2 and Rift](https://discourse.slicer.org/t/2-images-in-oculus-ques2-and-rift/21066)

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**Author:** [@August\_de\_Oliveira](https://discourse.slicer.org/u/August_de_Oliveira)\
**Replies:** 2\
**Last updated:** [December 16, 2021, 6:26pm UTC](https://discourse.slicer.org/t/2-images-in-oculus-ques2-and-rift/21066 "2021-12-16T18:26:42Z")

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Hello! I tried to use the VR extension of Slicer and I get two images (One per eye). I am running steam VR. I am sure it is just a setting. Thanks in advance for your advice.

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## [Loading mrml files fails and stalls](https://discourse.slicer.org/t/loading-mrml-files-fails-and-stalls/21069)

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**Author:** [@lucast4](https://discourse.slicer.org/u/lucast4)\
**Replies:** 3\
**Last updated:** [December 16, 2021, 6:25pm UTC](https://discourse.slicer.org/t/loading-mrml-files-fails-and-stalls/21069 "2021-12-16T18:25:07Z")

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Loading an MRML file (by dragging and dropping) stalls. The progress bar will reach a specific number (e…g, 99%) and won’t load. Then usually Slicer will crash. I have on the order of 10s to couple hundred objects that a…

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## [Is Resampling Necessary?](https://discourse.slicer.org/t/is-resampling-necessary/21055)

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**Author:** [@jamieawren](https://discourse.slicer.org/u/jamieawren)\
**Replies:** 9\
**Last updated:** [December 16, 2021, 5:18pm UTC](https://discourse.slicer.org/t/is-resampling-necessary/21055 "2021-12-16T17:18:59Z")

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Hi Everyone, I am using CT images to create segments of the cranium, and certain structures within the cranium, and then will be using segment statistics to compare the HU and volume for the segments between two differe…

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## [Long delay after disk activity stops when loading very large data](https://discourse.slicer.org/t/long-delay-after-disk-activity-stops-when-loading-very-large-data/13452)

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**Author:** [@jamesjcook](https://discourse.slicer.org/u/jamesjcook)\
**Replies:** 13\
**Last updated:** [December 16, 2021, 4:12pm UTC](https://discourse.slicer.org/t/long-delay-after-disk-activity-stops-when-loading-very-large-data/13452 "2021-12-16T16:12:06Z")

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I’m using slicer to work with very large files. After disk activity stops, there is a (surprisingly) long delay before the volume shows up in viewers. Disk time to load is a few minutes, the delay after that has been as…

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## [Convert .seg.nrrd to nrrd labelmap](https://discourse.slicer.org/t/convert-seg-nrrd-to-nrrd-labelmap/17838)

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**Author:** [@siyuan](https://discourse.slicer.org/u/siyuan)\
**Replies:** 9\
**Last updated:** [December 16, 2021, 3:42pm UTC](https://discourse.slicer.org/t/convert-seg-nrrd-to-nrrd-labelmap/17838 "2021-12-16T15:42:50Z")

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Hi, I was wondering how I could convert .seg.nrrd to a nrrd labelmap using pure python. Here is an attempt from my friend. It works but it may throw a broadcasting error sometime. Thanks a lot.

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## [Color Map - ShapePopulationViewer](https://discourse.slicer.org/t/color-map-shapepopulationviewer/21095)

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**Author:** [@PhilipF](https://discourse.slicer.org/u/PhilipF)\
**Replies:** 0\
**Last updated:** [December 16, 2021, 3:31pm UTC](https://discourse.slicer.org/t/color-map-shapepopulationviewer/21095 "2021-12-16T15:31:45Z")

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Operating system: Windows 10 Pro, 64-bit Slicer version: 4.11 I first constructed surface models from CBCTs. Then, I superimposed the two skull models, before and after, using CMF surface registration. After that, I mo…

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## [Revision 30502 built 2021-12-16 Linux download issue](https://discourse.slicer.org/t/revision-30502-built-2021-12-16-linux-download-issue/21091)

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**Author:** [@manjula](https://discourse.slicer.org/u/manjula)\
**Replies:** 1\
**Last updated:** [December 16, 2021, 1:53pm UTC](https://discourse.slicer.org/t/revision-30502-built-2021-12-16-linux-download-issue/21091 "2021-12-16T13:53:33Z")

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There is a problem with the preview release. It cannot be downloaded. thank you

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## [\[Build Error\] \[CentOS 7\] undefined reference to pthread\_\*](https://discourse.slicer.org/t/build-error-centos-7-undefined-reference-to-pthread/15142)

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**Author:** [@tbillah](https://discourse.slicer.org/u/tbillah)\
**Replies:** 6\
**Last updated:** [December 16, 2021, 8:53am UTC](https://discourse.slicer.org/t/build-error-centos-7-undefined-reference-to-pthread/15142 "2021-12-16T08:53:34Z")

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Hi, VTK builds independently in my CentOS 7 machine but appears not to as part of Slicer: Console log: \[ 50%\] Building CXX object Interaction/Widgets/CMakeFiles/vtkInteractionWidgetsObjects.dir/vtkContourLineInterpola…

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## [In segment editor, the  \*Effects\* part does not show entire options. How can i add more options to Effects part?](https://discourse.slicer.org/t/in-segment-editor-the-effects-part-does-not-show-entire-options-how-can-i-add-more-options-to-effects-part/21085)

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**Author:** [@moha\_sa](https://discourse.slicer.org/u/moha_sa)\
**Replies:** 1\
**Last updated:** [December 16, 2021, 6:24am UTC](https://discourse.slicer.org/t/in-segment-editor-the-effects-part-does-not-show-entire-options-how-can-i-add-more-options-to-effects-part/21085 "2021-12-16T06:24:44Z")

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Operating system: 64 bit windows 10 Pro Slicer version: 4.11.20210226 Expected behavior: I expect the Effects part on segment editor to include the entire options. Actual behavior: the Effects part only includes a fe…

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## [Some question about multiple graphics cards](https://discourse.slicer.org/t/some-question-about-multiple-graphics-cards/21072)

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**Author:** [@476663616](https://discourse.slicer.org/u/476663616)\
**Replies:** 1\
**Last updated:** [December 15, 2021, 1:47pm UTC](https://discourse.slicer.org/t/some-question-about-multiple-graphics-cards/21072 "2021-12-15T13:47:12Z")

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My lab has a server with multiple graphics cards. I am doing machine learning related operations, but slicer seems to work on graphics card 0 by default. Recently, many people are running programs, and my Slicer always p…

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## [Collaborative surgery planning in virtual reality](https://discourse.slicer.org/t/collaborative-surgery-planning-in-virtual-reality/6407)

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**Author:** [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Replies:** 10\
**Last updated:** [December 15, 2021, 6:41am UTC](https://discourse.slicer.org/t/collaborative-surgery-planning-in-virtual-reality/6407 "2021-12-15T06:41:46Z")

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Hi all, While working on some potential clinical use cases, we (with @lassoan) made a video about collaborative planning in VR, in which two Slicer instances using the same scene are connected through OpenIGTLink, so we…

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## [Trouble in DepthImageToPointCloud](https://discourse.slicer.org/t/trouble-in-depthimagetopointcloud/21051)

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**Author:** [@KWLee](https://discourse.slicer.org/u/KWLee)\
**Replies:** 2\
**Last updated:** [December 15, 2021, 12:32am UTC](https://discourse.slicer.org/t/trouble-in-depthimagetopointcloud/21051 "2021-12-15T00:32:46Z")

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Hello, I tried to register point cloud using realsense camera. However, the input volume is not activated.

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## [How to correctly export overlapping segmentations?](https://discourse.slicer.org/t/how-to-correctly-export-overlapping-segmentations/21050)

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**Author:** [@jlvahldiek](https://discourse.slicer.org/u/jlvahldiek)\
**Replies:** 2\
**Last updated:** [December 14, 2021, 7:47pm UTC](https://discourse.slicer.org/t/how-to-correctly-export-overlapping-segmentations/21050 "2021-12-14T19:47:28Z")

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Operating system: MacOS, Windows Slicer version: 4.13.0 Actual behavior: Several segmentations are drawn overlapping. These are exported to a nrrd file using the segmentations module (‘export to files’). When loading b…

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## [Surface area of model "islands" after threshold applied](https://discourse.slicer.org/t/surface-area-of-model-islands-after-threshold-applied/21057)

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**Author:** [@adamy](https://discourse.slicer.org/u/adamy)\
**Replies:** 1\
**Last updated:** [December 14, 2021, 5:48pm UTC](https://discourse.slicer.org/t/surface-area-of-model-islands-after-threshold-applied/21057 "2021-12-14T17:48:27Z")

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Hello everyone. I have a model which has a scalar value at every cell (first image). I have applied a threshold (from the Models module) and the result is in the second image. The location of the islands does not need to…

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## [Slicer radiomics with vtkSegment](https://discourse.slicer.org/t/slicer-radiomics-with-vtksegment/21037)

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**Author:** [@Nello\_Nepi](https://discourse.slicer.org/u/Nello_Nepi)\
**Replies:** 1\
**Last updated:** [December 14, 2021, 2:19pm UTC](https://discourse.slicer.org/t/slicer-radiomics-with-vtksegment/21037 "2021-12-14T14:19:15Z")

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Hi all. I am trying to use the radiomics lib but i cannot understand how to invoke the extractor.execute(image, mask) starting from a vtkSegment. My problem is that the mask is a segment of a segmentationNode, i cannot…

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## [Islands segmentation via python script](https://discourse.slicer.org/t/islands-segmentation-via-python-script/21021)

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**Author:** [@Valentina\_Nepi](https://discourse.slicer.org/u/Valentina_Nepi)\
**Replies:** 6\
**Last updated:** [December 13, 2021, 6:39pm UTC](https://discourse.slicer.org/t/islands-segmentation-via-python-script/21021 "2021-12-13T18:39:56Z")

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Hi everyone. I am trying to create and island segmentation directly via python script bypassing the 3dslicer gui. In the GUI i do these operations: load two diffents files, a label map and a master volume import the …

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## [2d markup projection](https://discourse.slicer.org/t/2d-markup-projection/21029)

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**Author:** [@juangmagic](https://discourse.slicer.org/u/juangmagic)\
**Replies:** 0\
**Last updated:** [December 13, 2021, 12:04am UTC](https://discourse.slicer.org/t/2d-markup-projection/21029 "2021-12-13T00:04:30Z")

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Hello, I’m looking for a way to visualize Line Markups, as a projection in all 2D views… Currently, when the projection option is active, the line is only visible on the surrounding slices, but I would like to see the li…

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## [Pixelated views and 3D segmentations from a cbct dicom data](https://discourse.slicer.org/t/pixelated-views-and-3d-segmentations-from-a-cbct-dicom-data/20966)

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**Author:** [@tarikau](https://discourse.slicer.org/u/tarikau)\
**Replies:** 5\
**Last updated:** [December 11, 2021, 9:06pm UTC](https://discourse.slicer.org/t/pixelated-views-and-3d-segmentations-from-a-cbct-dicom-data/20966 "2021-12-11T21:06:34Z")

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Hello, I’m trying to segment maxillary sinus from a dicom data taken from cone beam computed tomography device. I open a patient file, three kinds of images appear on the left screen (unnamed series - imageOrientationPa…

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## [Stitching artifact with volume rendering](https://discourse.slicer.org/t/stitching-artifact-with-volume-rendering/20885)

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**Author:** [@Hao\_Li](https://discourse.slicer.org/u/Hao_Li)\
**Replies:** 11\
**Last updated:** [December 10, 2021, 8:18pm UTC](https://discourse.slicer.org/t/stitching-artifact-with-volume-rendering/20885 "2021-12-10T20:18:33Z")

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Hi! I’ve ran into some problems with Radeon RX 6900 XT graphic card, Ryzen9 5900X, 128G RAM, using slicer versions 4.11.20210226 and 4.13.0-2021-12-01. The volumes seem to have stiched in wrong orders in 3D. There i…

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## [can we create a Virtual reality valve segmentation using hand controllers without headset](https://discourse.slicer.org/t/can-we-create-a-virtual-reality-valve-segmentation-using-hand-controllers-without-headset/21011)

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**Author:** [@anu\_preethi](https://discourse.slicer.org/u/anu_preethi)\
**Replies:** 0\
**Last updated:** [December 10, 2021, 7:17pm UTC](https://discourse.slicer.org/t/can-we-create-a-virtual-reality-valve-segmentation-using-hand-controllers-without-headset/21011 "2021-12-10T19:17:23Z")

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

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## [Translocating a structure to certain direction](https://discourse.slicer.org/t/translocating-a-structure-to-certain-direction/20969)

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**Author:** [@sima](https://discourse.slicer.org/u/sima)\
**Replies:** 3\
**Last updated:** [December 10, 2021, 6:29pm UTC](https://discourse.slicer.org/t/translocating-a-structure-to-certain-direction/20969 "2021-12-10T18:29:50Z")

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Hi every body i want to a structure translocates to certain direction that i define. how can i do that? thanks a lot

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## [Auomate DICE metric calculation](https://discourse.slicer.org/t/auomate-dice-metric-calculation/20983)

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**Author:** [@Sanghita\_Nag](https://discourse.slicer.org/u/Sanghita_Nag)\
**Replies:** 1\
**Last updated:** [December 10, 2021, 2:08pm UTC](https://discourse.slicer.org/t/auomate-dice-metric-calculation/20983 "2021-12-10T14:08:56Z")

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Is there a way to automate DICE metric calculation for a bunch of studies?

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## [Problem on start: horizontal green stripes](https://discourse.slicer.org/t/problem-on-start-horizontal-green-stripes/21000)

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**Author:** [@perphy](https://discourse.slicer.org/u/perphy)\
**Replies:** 1\
**Last updated:** [December 10, 2021, 1:41pm UTC](https://discourse.slicer.org/t/problem-on-start-horizontal-green-stripes/21000 "2021-12-10T13:41:27Z")

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Hi The window has green stripes. How can I solve it? Thanks

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## [Exporting DICOM and JPEG files directly from 3D slicer](https://discourse.slicer.org/t/exporting-dicom-and-jpeg-files-directly-from-3d-slicer/20998)

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**Author:** [@Aisha](https://discourse.slicer.org/u/Aisha)\
**Replies:** 2\
**Last updated:** [December 10, 2021, 1:28pm UTC](https://discourse.slicer.org/t/exporting-dicom-and-jpeg-files-directly-from-3d-slicer/20998 "2021-12-10T13:28:44Z")

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Hi all! I have annotated some brain MRI images in 3D slicer and would like to know how can I export those annotated 2D and 3D images in DICOM or any other format. I would like to know a direct method of exporting so I c…

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## [How did I do this](https://discourse.slicer.org/t/how-did-i-do-this/20976)

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**Author:** [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Replies:** 1\
**Last updated:** [December 9, 2021, 4:28pm UTC](https://discourse.slicer.org/t/how-did-i-do-this/20976 "2021-12-09T16:28:52Z")

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I have a segmentation that I could change the orientation of the red window from transverse to oblique to long view…and I don’t remember how I did it! Could someone please help me out here, thanks.

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## [Volume rendering and multiplanar reconstruction](https://discourse.slicer.org/t/volume-rendering-and-multiplanar-reconstruction/20955)

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**Author:** [@Luna](https://discourse.slicer.org/u/Luna)\
**Replies:** 2\
**Last updated:** [December 9, 2021, 1:45pm UTC](https://discourse.slicer.org/t/volume-rendering-and-multiplanar-reconstruction/20955 "2021-12-09T13:45:29Z")

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I am viewing my dicom files in 3D slicer and I notice that the images are stretched out in yz and xz plane, so in all the planes except the original image plane which is xy plane. I tried fiji imageJ as well but my image…

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## [BRAINS Registration fails in V4.11.20210226](https://discourse.slicer.org/t/brains-registration-fails-in-v4-11-20210226/20806)

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**Author:** [@Lutz](https://discourse.slicer.org/u/Lutz)\
**Replies:** 3\
**Last updated:** [December 9, 2021, 1:44pm UTC](https://discourse.slicer.org/t/brains-registration-fails-in-v4-11-20210226/20806 "2021-12-09T13:44:29Z")

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Hi to all, I am using Slicer at the University of Nueremberg to train Master students in addition to some theroretical lessons. One experiment is based on CT Registration Tutorial by Michael Fassbind from youtube. Herei…

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## [Can Python interpretor be used to call Slicer IGT "create models" ?](https://discourse.slicer.org/t/can-python-interpretor-be-used-to-call-slicer-igt-create-models/20948)

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**Author:** [@clement\_laplace](https://discourse.slicer.org/u/clement_laplace)\
**Replies:** 1\
**Last updated:** [December 8, 2021, 11:11pm UTC](https://discourse.slicer.org/t/can-python-interpretor-be-used-to-call-slicer-igt-create-models/20948 "2021-12-08T23:11:17Z")

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Hello, I am a fairly new user of 3D Slicer. I was wondering if it is possible to call the “CreateModels” functions of the Slicer IGT module from a python script. I need to create cylinder models in a more automated way…

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## [3D Slicer Elastix registration method](https://discourse.slicer.org/t/3d-slicer-elastix-registration-method/20964)

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**Author:** [@Vincebisca](https://discourse.slicer.org/u/Vincebisca)\
**Replies:** 3\
**Last updated:** [December 8, 2021, 4:54pm UTC](https://discourse.slicer.org/t/3d-slicer-elastix-registration-method/20964 "2021-12-08T16:54:25Z")

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Hello, I’m just having a very small interrogation: what is the registration method used in 3D Slicer’s Elastix extension? I saw that a common method of registration in the litterature is Mutual Information but I don’t k…

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## [ROI bounding box export to DICOM RT](https://discourse.slicer.org/t/roi-bounding-box-export-to-dicom-rt/20906)

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**Author:** [@alireza](https://discourse.slicer.org/u/alireza)\
**Replies:** 2\
**Last updated:** [December 7, 2021, 1:56pm UTC](https://discourse.slicer.org/t/roi-bounding-box-export-to-dicom-rt/20906 "2021-12-07T13:56:50Z")

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Is it possible to export ROI bounding box annotations to DICOM RT (I know it is not the perfect export type, but I need it to be DICOM RT)? When I export it, and import it back it doesn’t show what I expect (contours). H…

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