# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=319

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

**Page:** 320

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## [How to map a projector's image to a model(AR) precise?](https://discourse.slicer.org/t/how-to-map-a-projectors-image-to-a-model-ar-precise/13569)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 5\
**Last updated:** [October 2, 2020, 5:13am UTC](https://discourse.slicer.org/t/how-to-map-a-projectors-image-to-a-model-ar-precise/13569 "2020-10-02T05:13:46Z")

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How to map a projector’s image to a 3d printing model of brain(AR) precise?

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## [Meshing: Self-intersecting faces](https://discourse.slicer.org/t/meshing-self-intersecting-faces/13588)

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**Author:** [@Fluvio\_Lobo](https://discourse.slicer.org/u/Fluvio_Lobo)\
**Replies:** 13\
**Last updated:** [October 2, 2020, 1:25am UTC](https://discourse.slicer.org/t/meshing-self-intersecting-faces/13588 "2020-10-02T01:25:13Z")

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Hello, These question may be a little outside the realm of Slicer, but it never hurts to ask! Our team has been using Cleaver to create some amazing multi-material, conforming meshes. However, we have found mesh qualit…

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## [ophthalmic artery extraction](https://discourse.slicer.org/t/ophthalmic-artery-extraction/13462)

<div class="topic-metadata">

**Author:** [@ErenC](https://discourse.slicer.org/u/ErenC)\
**Replies:** 5\
**Last updated:** [October 1, 2020, 9:44pm UTC](https://discourse.slicer.org/t/ophthalmic-artery-extraction/13462 "2020-10-01T21:44:25Z")

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Hello everyone, I found 3D slicer couple of days ago, it is a great environment! I followed youtube tutorials, did some trials and I really liked it. But I am failed to extract the ophthalmic artery. I tried head and br…

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## [No extensions for windows or Linux for todays build](https://discourse.slicer.org/t/no-extensions-for-windows-or-linux-for-todays-build/13803)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 1\
**Last updated:** [October 1, 2020, 8:46pm UTC](https://discourse.slicer.org/t/no-extensions-for-windows-or-linux-for-todays-build/13803 "2020-10-01T20:46:01Z")

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As far as I can tell from the dashboard

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## [Get the python code from an extern modules](https://discourse.slicer.org/t/get-the-python-code-from-an-extern-modules/13779)

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**Author:** [@aldoSanchez](https://discourse.slicer.org/u/aldoSanchez)\
**Replies:** 2\
**Last updated:** [October 1, 2020, 6:39pm UTC](https://discourse.slicer.org/t/get-the-python-code-from-an-extern-modules/13779 "2020-10-01T18:39:23Z")

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hi I’m trying to getting access to a module call SandBox. I’m actually seen the script, but I don’t know how to change the parameter by coding.

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## [How top crop the volume using python?](https://discourse.slicer.org/t/how-top-crop-the-volume-using-python/13791)

<div class="topic-metadata">

**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 1\
**Last updated:** [October 1, 2020, 10:13am UTC](https://discourse.slicer.org/t/how-top-crop-the-volume-using-python/13791 "2020-10-01T10:13:40Z")

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I had selected the ROI of a volume.And want to crop it in python. How can I do this?

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## [Extensions build error: numpy not found](https://discourse.slicer.org/t/extensions-build-error-numpy-not-found/13768)

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**Author:** [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Replies:** 2\
**Last updated:** [October 1, 2020, 9:16am UTC](https://discourse.slicer.org/t/extensions-build-error-numpy-not-found/13768 "2020-10-01T09:16:30Z")

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In the SlicerRadiomics extension, PyRadiomics is built as an external dependency. However, in the Linux build, the PyRadiomics build fails, due to “No module named numpy”. Numpy is needed for de setup of PyRadiomics, as…

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## [Extension build error windows (MSCV version not recognized)](https://discourse.slicer.org/t/extension-build-error-windows-mscv-version-not-recognized/13770)

<div class="topic-metadata">

**Author:** [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Replies:** 4\
**Last updated:** [October 1, 2020, 9:15am UTC](https://discourse.slicer.org/t/extension-build-error-windows-mscv-version-not-recognized/13770 "2020-10-01T09:15:24Z")

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The SlicerRadiomics build on windows fails on the configuration step. From the log it appears that it detects a MSVC\_version of 1924, but just after that it states that this version is not found.

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## [How to set ROI of volume in python?](https://discourse.slicer.org/t/how-to-set-roi-of-volume-in-python/13787)

<div class="topic-metadata">

**Author:** [@Chintha\_Siva\_Prasad](https://discourse.slicer.org/u/Chintha_Siva_Prasad)\
**Replies:** 3\
**Last updated:** [October 1, 2020, 9:04am UTC](https://discourse.slicer.org/t/how-to-set-roi-of-volume-in-python/13787 "2020-10-01T09:04:26Z")

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How can I set cropping ROi mode for a volume in python script?

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## [Displayed transform vs .tfm content](https://discourse.slicer.org/t/displayed-transform-vs-tfm-content/270)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 2\
**Last updated:** [September 30, 2020, 10:15pm UTC](https://discourse.slicer.org/t/displayed-transform-vs-tfm-content/270 "2020-09-30T22:15:15Z")

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Hi, I created a transform in slicer. The information part of the Transform modules shows it like this; Transform to parent: Linear -0.12 -0.96 0.26 \*\*710\*\* 0.99 -0.1 0.1 \*\*19\*\* -0.07 0.27 0.96 -\*\*58\*\* 0 0 0 1 When…

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## [Seeding basics for new user](https://discourse.slicer.org/t/seeding-basics-for-new-user/13718)

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**Author:** [@jax200](https://discourse.slicer.org/u/jax200)\
**Replies:** 8\
**Last updated:** [September 30, 2020, 6:23pm UTC](https://discourse.slicer.org/t/seeding-basics-for-new-user/13718 "2020-09-30T18:23:19Z")

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When painting in Segment Editor for “Grow from Seeds”, I understand you paint inside with one layer and circle around with another layer in order to segment out a structure. Without any added specification, how does th…

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## [Liver visualization in 3D](https://discourse.slicer.org/t/liver-visualization-in-3d/13747)

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**Author:** [@jax200](https://discourse.slicer.org/u/jax200)\
**Replies:** 3\
**Last updated:** [September 30, 2020, 6:21pm UTC](https://discourse.slicer.org/t/liver-visualization-in-3d/13747 "2020-09-30T18:21:37Z")

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I wanted to also mention when using Threshold on an abdominal scan I can get a good 3D rendering on vasculature, but when I then add Paint/Seeding for the liver segment, the 3D view only shows slices and dots. How to ge…

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## [Call an specifica class frome c++ in python](https://discourse.slicer.org/t/call-an-specifica-class-frome-c-in-python/13777)

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**Author:** [@aldoSanchez](https://discourse.slicer.org/u/aldoSanchez)\
**Replies:** 2\
**Last updated:** [September 30, 2020, 5:05pm UTC](https://discourse.slicer.org/t/call-an-specifica-class-frome-c-in-python/13777 "2020-09-30T17:05:41Z")

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hello I’m trying to access to this action: vtkMRMLLabelMapVolumeDisplayNode::vtkMRMLLabelMapVolumeDisplayNode() { this-\>MapToColors = vtkImageMapToColors::New(); this-\>MapToColors-\>SetOutputFormatToRGBA(); // set …

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## [Fill holes in mesh](https://discourse.slicer.org/t/fill-holes-in-mesh/13719)

<div class="topic-metadata">

**Author:** [@loubna](https://discourse.slicer.org/u/loubna)\
**Replies:** 4\
**Last updated:** [September 30, 2020, 12:57pm UTC](https://discourse.slicer.org/t/fill-holes-in-mesh/13719 "2020-09-30T12:57:39Z")

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Hi; I have a 3D image (vtkImageData with holes) on which I applied Marching cubes and I get a 3d surface with small holes (see attached figure). To deal with this problem, I have resampled the 3D image with sampledFa…

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## [Is it possible to merge multiple labels into one label in a segmentation image?](https://discourse.slicer.org/t/is-it-possible-to-merge-multiple-labels-into-one-label-in-a-segmentation-image/13764)

<div class="topic-metadata">

**Author:** [@kevin.x](https://discourse.slicer.org/u/kevin.x)\
**Replies:** 1\
**Last updated:** [September 30, 2020, 9:18am UTC](https://discourse.slicer.org/t/is-it-possible-to-merge-multiple-labels-into-one-label-in-a-segmentation-image/13764 "2020-09-30T09:18:04Z")

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Hi all, I have an image with multiple labels and I want to merge them and label it as a single label. Is it possible for me to do it in 3D Slicer or ITK-SNAP? Here is the image displaying in 3D Slicer and ITK-SNAP: …

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## [Segment-Meshing multiple segments](https://discourse.slicer.org/t/segment-meshing-multiple-segments/13595)

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**Author:** [@Shajia\_Ali](https://discourse.slicer.org/u/Shajia_Ali)\
**Replies:** 10\
**Last updated:** [September 30, 2020, 8:04am UTC](https://discourse.slicer.org/t/segment-meshing-multiple-segments/13595 "2020-09-30T08:04:52Z")

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Hi, I discovered segment-mesher quite recently and my goal is to create a mesh of a nutshell and the vascular bundles within it. My attempt is to have two meshes. One for the shell (with holes) and one only for the vasc…

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## [Use Pyradiomics for texture analysis in ultrasound images](https://discourse.slicer.org/t/use-pyradiomics-for-texture-analysis-in-ultrasound-images/13763)

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**Author:** [@Laura\_Valdes](https://discourse.slicer.org/u/Laura_Valdes)\
**Replies:** 0\
**Last updated:** [September 30, 2020, 1:05am UTC](https://discourse.slicer.org/t/use-pyradiomics-for-texture-analysis-in-ultrasound-images/13763 "2020-09-30T01:05:52Z")

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Hello Everyone, I need to use Pyradiomics for extract radiomics features, and I want to know if I can use the extractor without a path, just using the whole image. Thanks

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## [Slicer 4.11.0-2020-09-28 does not start succesfully](https://discourse.slicer.org/t/slicer-4-11-0-2020-09-28-does-not-start-succesfully/13749)

<div class="topic-metadata">

**Author:** [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Replies:** 1\
**Last updated:** [September 29, 2020, 8:41pm UTC](https://discourse.slicer.org/t/slicer-4-11-0-2020-09-28-does-not-start-succesfully/13749 "2020-09-29T20:41:11Z")

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This is to alert any other users that might come to the forum that today’s Slicer Preview build (Slicer 4.11.0-2020-09-28) does not start successfully. The issue can be tracked at Slicer 4.11.0-2020-09-28 does not start…

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## [Build fails in VTK : many undefined references](https://discourse.slicer.org/t/build-fails-in-vtk-many-undefined-references/12150)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 11\
**Last updated:** [September 29, 2020, 6:51pm UTC](https://discourse.slicer.org/t/build-fails-in-vtk-many-undefined-references/12150 "2020-09-29T18:51:16Z")

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Hello, Sorry to bother you again. Slicer (128fb86dd18) build fails in VTK on Arch Linux as such : /usr/bin/ld: CMakeFiles/vtkProbeOpenGLVersion.dir/vtkProbeOpenGLVersion.cxx.o: in function main': vtkProbeOpenGLVersion…

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## [Get a flipped and rotated segmentation label image using python script](https://discourse.slicer.org/t/get-a-flipped-and-rotated-segmentation-label-image-using-python-script/13756)

<div class="topic-metadata">

**Author:** [@N\_Hunter](https://discourse.slicer.org/u/N_Hunter)\
**Replies:** 0\
**Last updated:** [September 29, 2020, 6:36pm UTC](https://discourse.slicer.org/t/get-a-flipped-and-rotated-segmentation-label-image-using-python-script/13756 "2020-09-29T18:36:56Z")

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Hi, there, I recently use python script to export segmentations to labelmap and save it on the disk, to save some clicks. But instead, I get a rotated and flipped labelmap, like below: This should be a “4”, but instea…

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## [Reconstruction of 3D ultrasound volume using 2D sweeps lags and low quality](https://discourse.slicer.org/t/reconstruction-of-3d-ultrasound-volume-using-2d-sweeps-lags-and-low-quality/13676)

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**Author:** [@AurelieS](https://discourse.slicer.org/u/AurelieS)\
**Replies:** 6\
**Last updated:** [September 29, 2020, 1:58pm UTC](https://discourse.slicer.org/t/reconstruction-of-3d-ultrasound-volume-using-2d-sweeps-lags-and-low-quality/13676 "2020-09-29T13:58:37Z")

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Hi, I am doing volume reconstruction using 2D ultrasound like in your video : However, my computer does not seem powerful enough (16Go RAM & Nvidia graphics card) to do live reconstruction, the system is…

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## [Resample Image (BRAIN)](https://discourse.slicer.org/t/resample-image-brain/13736)

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**Author:** [@zahiraabdala](https://discourse.slicer.org/u/zahiraabdala)\
**Replies:** 5\
**Last updated:** [September 29, 2020, 1:45pm UTC](https://discourse.slicer.org/t/resample-image-brain/13736 "2020-09-29T13:45:31Z")

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Hi everyone, I need to know how Resample Image (BRAIN) module works. I use it and its works very well but I need more information about the functionality. I was looking for more information but I only found this link and…

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## [\[vtkMRMLSegmentationNode\] Unable to load .mha file as a segmentation node](https://discourse.slicer.org/t/vtkmrmlsegmentationnode-unable-to-load-mha-file-as-a-segmentation-node/13742)

<div class="topic-metadata">

**Author:** [@strider\_hunter](https://discourse.slicer.org/u/strider_hunter)\
**Replies:** 2\
**Last updated:** [September 29, 2020, 12:23pm UTC](https://discourse.slicer.org/t/vtkmrmlsegmentationnode-unable-to-load-mha-file-as-a-segmentation-node/13742 "2020-09-29T12:23:45Z")

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I have a file which is originally .nrrd but I convert it to .mha (for homogeneity purposes as I use other datasets as well) I am able to load the .nrrd file using slicer.util.loadSegmentation(pathMaskFile), but unable t…

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## [How to access/get to the scale space particles?](https://discourse.slicer.org/t/how-to-access-get-to-the-scale-space-particles/13591)

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**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 0\
**Last updated:** [September 21, 2020, 4:02pm UTC](https://discourse.slicer.org/t/how-to-access-get-to-the-scale-space-particles/13591 "2020-09-21T16:02:01Z")

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Hello Dear Developers and Users How can I access the scale space particles? I found out that this technique is used in SlicerCIP. Is it possible to get this particle system for the further processing? On what images …

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## [How to get scale particles?](https://discourse.slicer.org/t/how-to-get-scale-particles/13743)

<div class="topic-metadata">

**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 0\
**Last updated:** [September 29, 2020, 11:10am UTC](https://discourse.slicer.org/t/how-to-get-scale-particles/13743 "2020-09-29T11:10:33Z")

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Hello Dear Developers and Users In the Particles module, which is a subset of the Chest Imaging Platform module, I see that the information of particles must be available as input in the Input Particles FileName sectio…

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## [Airway anatomy question](https://discourse.slicer.org/t/airway-anatomy-question/13731)

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**Author:** [@Florence](https://discourse.slicer.org/u/Florence)\
**Replies:** 0\
**Last updated:** [September 28, 2020, 12:30pm UTC](https://discourse.slicer.org/t/airway-anatomy-question/13731 "2020-09-28T12:30:58Z")

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Hi, I am a 3D artist looking to build an anatomical lung model as a personal project. To do so, I started by using 3DSlicer and used 2 different lungs CT scans that could serve as a base. I tried to identify the segmen…

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## [Straighten the vessel segments in a network](https://discourse.slicer.org/t/straighten-the-vessel-segments-in-a-network/13456)

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**Author:** [@Deepa](https://discourse.slicer.org/u/Deepa)\
**Replies:** 8\
**Last updated:** [September 28, 2020, 1:32pm UTC](https://discourse.slicer.org/t/straighten-the-vessel-segments-in-a-network/13456 "2020-09-28T13:32:56Z")

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Hi All, I have got a network of blood vessels and I’m looking for ways to straighten each segment/branch in the network. I found some discussions on straightening single segments, I’m not sure if it is possible to strai…

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## [RAS to LPS transform for older models](https://discourse.slicer.org/t/ras-to-lps-transform-for-older-models/13724)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 1\
**Last updated:** [September 28, 2020, 4:46am UTC](https://discourse.slicer.org/t/ras-to-lps-transform-for-older-models/13724 "2020-09-28T04:46:39Z")

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We have a bunch of models (and associated landmarks) that were exported from Slicer 4-5 years ago. Instead of trying to remember to set the coordinate to RAS each time when loading them, we would like to convert them to …

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## [Can I open a single .raw file without the .mhd file? ](https://discourse.slicer.org/t/can-i-open-a-single-raw-file-without-the-mhd-file/13706)

<div class="topic-metadata">

**Author:** [@kevin.x](https://discourse.slicer.org/u/kevin.x)\
**Replies:** 4\
**Last updated:** [September 28, 2020, 1:45am UTC](https://discourse.slicer.org/t/can-i-open-a-single-raw-file-without-the-mhd-file/13706 "2020-09-28T01:45:17Z")

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Hi all, I got some labeled medical images in .raw format. Can I open a single .raw file without the .mhd file using 3D Slicer? And if not, is there any tool to convert the .raw file to .nii file? Much appreciated!

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## [Surface semilandmarks created inadequately](https://discourse.slicer.org/t/surface-semilandmarks-created-inadequately/13704)

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**Author:** [@lv\_xiao](https://discourse.slicer.org/u/lv_xiao)\
**Replies:** 7\
**Last updated:** [September 27, 2020, 4:07pm UTC](https://discourse.slicer.org/t/surface-semilandmarks-created-inadequately/13704 "2020-09-27T16:07:32Z")

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I would like to use SlicerMorph to place surface semilandmarks. I tried two ways, either digitizing the fixed landmarks inside SlicerMorph or in external software. Both approaches failed. For method 1, I used the “Creat…

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