# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=223

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

**Page:** 224

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## [Error when trying to load module RVesselX](https://discourse.slicer.org/t/error-when-trying-to-load-module-rvesselx/23493)

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**Author:** [@n0wm3](https://discourse.slicer.org/u/n0wm3)\
**Replies:** 3\
**Last updated:** [May 20, 2022, 6:25am UTC](https://discourse.slicer.org/t/error-when-trying-to-load-module-rvesselx/23493 "2022-05-20T06:25:32Z")

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Hello, I’m trying to install an extension SilcerRVXLiverSegmentation, and when I couldn’t load the module. Here is the error log: Traceback (most recent call last): File “”, line 1, in File “C:\\Users\\karis\\AppData\\L…

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## [Analysing Cupping Effect of a CT-Scanner](https://discourse.slicer.org/t/analysing-cupping-effect-of-a-ct-scanner/23178)

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**Author:** [@Joshua](https://discourse.slicer.org/u/Joshua)\
**Replies:** 1\
**Last updated:** [May 19, 2022, 7:27pm UTC](https://discourse.slicer.org/t/analysing-cupping-effect-of-a-ct-scanner/23178 "2022-05-19T19:27:44Z")

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Hello, I’d like to analyse the homogeneity of the voxel values along the x, y and z axis. Is there any way of getting the mean voxel value of an area along an axis. Like for each slice the same area → calculating the …

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## [why after adding data from files the slicer flashback?](https://discourse.slicer.org/t/why-after-adding-data-from-files-the-slicer-flashback/23494)

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**Author:** [@Frankling712](https://discourse.slicer.org/u/Frankling712)\
**Replies:** 9\
**Last updated:** [May 19, 2022, 6:07pm UTC](https://discourse.slicer.org/t/why-after-adding-data-from-files-the-slicer-flashback/23494 "2022-05-19T18:07:11Z")

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## [Virtual occlusion](https://discourse.slicer.org/t/virtual-occlusion/23483)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 1\
**Last updated:** [May 19, 2022, 3:45pm UTC](https://discourse.slicer.org/t/virtual-occlusion/23483 "2022-05-19T15:45:06Z")

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greetings i do plenty of jaw surgeries and I do need to test new teeth interdigitation ( dental occlusion ). is there a way to do virtual occlusion in 3D slicer . if not I wish that feature to be developed thanks

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## [Sequence volume reconstruction calibration](https://discourse.slicer.org/t/sequence-volume-reconstruction-calibration/23486)

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**Author:** [@Karl-Philippe](https://discourse.slicer.org/u/Karl-Philippe)\
**Replies:** 1\
**Last updated:** [May 19, 2022, 3:30pm UTC](https://discourse.slicer.org/t/sequence-volume-reconstruction-calibration/23486 "2022-05-19T15:30:29Z")

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Hello, I am trying to reconstruct a 3D ultrasound volume with the slicer volume reconstruction module. I can correctly apply the calibration matrix (image to probe) specified in the plus server configuration file (used …

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## [Volume display colour map of only a segmentation of the image](https://discourse.slicer.org/t/volume-display-colour-map-of-only-a-segmentation-of-the-image/23476)

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**Author:** [@Jacchevalier](https://discourse.slicer.org/u/Jacchevalier)\
**Replies:** 3\
**Last updated:** [May 18, 2022, 8:28pm UTC](https://discourse.slicer.org/t/volume-display-colour-map-of-only-a-segmentation-of-the-image/23476 "2022-05-18T20:28:18Z")

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Hi guys, I’m trying to create this heat map but only within the segmentation and the remaining image to be a greyscale CT as usual. Any suggestions?

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## [Get coordinates or equation of a polynomial curve](https://discourse.slicer.org/t/get-coordinates-or-equation-of-a-polynomial-curve/23469)

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**Author:** [@Eva](https://discourse.slicer.org/u/Eva)\
**Replies:** 0\
**Last updated:** [May 18, 2022, 12:34pm UTC](https://discourse.slicer.org/t/get-coordinates-or-equation-of-a-polynomial-curve/23469 "2022-05-18T12:34:27Z")

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Hello, I drew a polynomial curve from a point list but is it possible to have informations on that polynomial curve, such as coordinates or equation ? Thank you for your help, Eva

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## [DICOM files import](https://discourse.slicer.org/t/dicom-files-import/23461)

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**Author:** [@Kawtar\_Lakrad](https://discourse.slicer.org/u/Kawtar_Lakrad)\
**Replies:** 0\
**Last updated:** [May 17, 2022, 6:39pm UTC](https://discourse.slicer.org/t/dicom-files-import/23461 "2022-05-17T18:39:35Z")

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Operating system: windows 11 Slicer version:4.13.0.2022.04.01 I am exporting Dicom files to slicer, and I was wondering what the issue can be in this case? Expected behavior: Actual behavior:

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## [How to setup Jupyter Desktop Server](https://discourse.slicer.org/t/how-to-setup-jupyter-desktop-server/23455)

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**Author:** [@Tiago\_Guiomar](https://discourse.slicer.org/u/Tiago_Guiomar)\
**Replies:** 0\
**Last updated:** [May 17, 2022, 1:03pm UTC](https://discourse.slicer.org/t/how-to-setup-jupyter-desktop-server/23455 "2022-05-17T13:03:32Z")

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I’m trying to show the GUI in my jupyter notebook but I need to setup the Jupyter Desktop Server, any idea on how to do it?

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## [PyRadiomics for 2D images (png or nrrd)](https://discourse.slicer.org/t/pyradiomics-for-2d-images-png-or-nrrd/6357)

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**Author:** [@MachadoL](https://discourse.slicer.org/u/MachadoL)\
**Replies:** 13\
**Last updated:** [May 17, 2022, 1:04pm UTC](https://discourse.slicer.org/t/pyradiomics-for-2d-images-png-or-nrrd/6357 "2022-05-17T13:04:11Z")

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Hi everyone, I am trying to extract radiomic features from 2D images (PNG or Nrrd) but I start to get a series of errors saying basically “3D array expected”. When I do that directly on slicer it works well. I’m using …

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## [Distance measurement](https://discourse.slicer.org/t/distance-measurement/8495)

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**Author:** [@RadioQuest](https://discourse.slicer.org/u/RadioQuest)\
**Replies:** 7\
**Last updated:** [May 17, 2022, 3:42am UTC](https://discourse.slicer.org/t/distance-measurement/8495 "2022-05-17T03:42:37Z")

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Hi… Is there a tool to measure the distance between 2 points. (ruler annotation is not useful). I need some kind of ruler or scale to measure the size/ distance. Thanks.

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## [Straightened volume failed in version 5.1.0-2022-05-01](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435)

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**Author:** [@chendong9416](https://discourse.slicer.org/u/chendong9416)\
**Replies:** 4\
**Last updated:** [May 17, 2022, 3:15am UTC](https://discourse.slicer.org/t/straightened-volume-failed-in-version-5-1-0-2022-05-01/23435 "2022-05-17T03:15:25Z")

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Recently, i made an update for 3D slicer to version 5.1.0-2022-05-01, and used open curve module to for a center line for the aorta, then i used curved planar reformat to form a straightened volume base on the open curve…

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## [Calculate thickness of thin muscle](https://discourse.slicer.org/t/calculate-thickness-of-thin-muscle/13444)

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**Author:** [@lmach](https://discourse.slicer.org/u/lmach)\
**Replies:** 14\
**Last updated:** [May 16, 2022, 9:28pm UTC](https://discourse.slicer.org/t/calculate-thickness-of-thin-muscle/13444 "2022-05-16T21:28:12Z")

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Hi! I want to measure the thickness/distance between the inner and outer boundary of a muscle that I have segmented. I have followed the workflow from this link: How to analyze the thickness of the model Now, I am n…

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## [Why the image dicom int16 cannot do the segmentation using PetTumorSegmentation Extension?](https://discourse.slicer.org/t/why-the-image-dicom-int16-cannot-do-the-segmentation-using-pettumorsegmentation-extension/23368)

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**Author:** [@akmal871026](https://discourse.slicer.org/u/akmal871026)\
**Replies:** 6\
**Last updated:** [May 16, 2022, 2:45pm UTC](https://discourse.slicer.org/t/why-the-image-dicom-int16-cannot-do-the-segmentation-using-pettumorsegmentation-extension/23368 "2022-05-16T14:45:34Z")

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Dear all, I have data set image dicom SPECT (link as attached). The type is int16. I want to apply the PetTumorSegmentation extension to do the volume segmentation. But it cannot function well. Anyone can help? https…

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## [Older versions of 3D Slicer](https://discourse.slicer.org/t/older-versions-of-3d-slicer/23378)

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**Author:** [@naninano1](https://discourse.slicer.org/u/naninano1)\
**Replies:** 6\
**Last updated:** [May 14, 2022, 11:29pm UTC](https://discourse.slicer.org/t/older-versions-of-3d-slicer/23378 "2022-05-14T23:29:58Z")

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Hi, Since my laptop does not support the Open GL, I receive this error: See more information and help at: https://www.slicer.org/wiki/Documentation/Nightly/FAQ/General#Slicer\_does\_not\_start Graphics capabilities of t…

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## [Tutorial on terminologies](https://discourse.slicer.org/t/tutorial-on-terminologies/23400)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 3\
**Last updated:** [May 14, 2022, 11:07pm UTC](https://discourse.slicer.org/t/tutorial-on-terminologies/23400 "2022-05-14T23:07:54Z")

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How does one go about creating a custom segmentation terminology/colors and using that during the segmentation process (I.e., renaming segment\_1 segment\_2 with consistent names and colors)… Linked sample json file in th…

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## [In-plane view rotation via mouse interaction?](https://discourse.slicer.org/t/in-plane-view-rotation-via-mouse-interaction/23416)

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**Author:** [@Karl\_Hahn](https://discourse.slicer.org/u/Karl_Hahn)\
**Replies:** 0\
**Last updated:** [May 13, 2022, 8:10pm UTC](https://discourse.slicer.org/t/in-plane-view-rotation-via-mouse-interaction/23416 "2022-05-13T20:10:31Z")

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To my knowledge, a view may only be translated or zoomed via mouse interaction. Would it make sense to enable view rotation, e.g. about the view’s center? Combined with the great addition of the interactive slice inters…

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## [Cannot select a volume in Input lung CT manual ](https://discourse.slicer.org/t/cannot-select-a-volume-in-input-lung-ct-manual/23307)

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**Author:** [@zhongheng](https://discourse.slicer.org/u/zhongheng)\
**Replies:** 2\
**Last updated:** [May 13, 2022, 11:38am UTC](https://discourse.slicer.org/t/cannot-select-a-volume-in-input-lung-ct-manual/23307 "2022-05-13T11:38:52Z")

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Dear Sir, Thank you for your excellent package for processing lung image; However, when I loaded a series of lung CT in .tiff format, I follow the instruction for “Lung CT Analyzer”. I found I cannot select a volume (i.…

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## [Paint tool resolution](https://discourse.slicer.org/t/paint-tool-resolution/23396)

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**Author:** [@BoneArtist](https://discourse.slicer.org/u/BoneArtist)\
**Replies:** 2\
**Last updated:** [May 12, 2022, 10:05pm UTC](https://discourse.slicer.org/t/paint-tool-resolution/23396 "2022-05-12T22:05:27Z")

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Is there a way to increase the resolution of the paint tool or some other method of getting a finer stepped pattern, as seen in the red line. I come from an illustration background and understand the smoothing that happe…

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## [Exporting Ultrasound DICOM Volume](https://discourse.slicer.org/t/exporting-ultrasound-dicom-volume/23394)

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**Author:** [@Fluvio\_Lobo](https://discourse.slicer.org/u/Fluvio_Lobo)\
**Replies:** 0\
**Last updated:** [May 12, 2022, 6:40pm UTC](https://discourse.slicer.org/t/exporting-ultrasound-dicom-volume/23394 "2022-05-12T18:40:36Z")

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Hello, We have two different models of Phillips ultrasound machines in our hospital. The EPIQ 7W for OB and the 7C for cardiology. We have been using the 7W to export volumes of fetal pathology to reconstruct using 3D …

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## [The difference between model and mesh](https://discourse.slicer.org/t/the-difference-between-model-and-mesh/23389)

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**Author:** [@yyl](https://discourse.slicer.org/u/yyl)\
**Replies:** 1\
**Last updated:** [May 12, 2022, 4:59pm UTC](https://discourse.slicer.org/t/the-difference-between-model-and-mesh/23389 "2022-05-12T16:59:50Z")

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I am very happy that I can use 3D slicer to place and transfer landmarks and semilandmarks.I saw an expert in the slicer forum saying that currently 3D slicer does not support the sliding of semilandmarks and it can be a…

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## [How to change the name of a folder in the subject hierarchy](https://discourse.slicer.org/t/how-to-change-the-name-of-a-folder-in-the-subject-hierarchy/23360)

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**Author:** [@koeglfryderyk](https://discourse.slicer.org/u/koeglfryderyk)\
**Replies:** 3\
**Last updated:** [May 12, 2022, 2:13pm UTC](https://discourse.slicer.org/t/how-to-change-the-name-of-a-folder-in-the-subject-hierarchy/23360 "2022-05-12T14:13:30Z")

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I want to change the name of a folder in the Subject hierarchy in the ‘Data’ module. I tried using SetItemName() like this: subject\_hierarchy\_node.SetItemName(296, 'new\_name') but this only changed the name in the ‘Su…

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## [Add storageNode to volumeNode created from a numpy array](https://discourse.slicer.org/t/add-storagenode-to-volumenode-created-from-a-numpy-array/23374)

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**Author:** [@Marc-3d](https://discourse.slicer.org/u/Marc-3d)\
**Replies:** 4\
**Last updated:** [May 12, 2022, 12:39pm UTC](https://discourse.slicer.org/t/add-storagenode-to-volumenode-created-from-a-numpy-array/23374 "2022-05-12T12:39:43Z")

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Hello, I am creating a volumeNode and populating it with data from a 3D numpy array. volumeNode = slicer.mrmlScene.AddNewNodeByClass('vtkMRMLScalarVolumeNode') slicer.util.updateVolumeFromArray(volumeNode, data) Lat…

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## [Slicer and JupyterHub](https://discourse.slicer.org/t/slicer-and-jupyterhub/23358)

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**Author:** [@SaraPoli22](https://discourse.slicer.org/u/SaraPoli22)\
**Replies:** 3\
**Last updated:** [May 12, 2022, 12:25pm UTC](https://discourse.slicer.org/t/slicer-and-jupyterhub/23358 "2022-05-12T12:25:02Z")

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Hi, for my thesis I would need to use Slicer on a server created with JupyterHub, could you tell me how to add the Slicer kernel to allow the use of Slicer without installation? Thanks for your help.

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## [Change Color map and add color scale](https://discourse.slicer.org/t/change-color-map-and-add-color-scale/10953)

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**Author:** [@Adam1122](https://discourse.slicer.org/u/Adam1122)\
**Replies:** 7\
**Last updated:** [May 11, 2022, 7:47pm UTC](https://discourse.slicer.org/t/change-color-map-and-add-color-scale/10953 "2022-05-11T19:47:55Z")

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Hello all, I did the post-processing on brain images in 3D Slicer. I changed the color coding to display where MR signals values are higher or lower. I need to add the color bar onto the image in order to easily identif…

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## [Get/Set GUI data from Python](https://discourse.slicer.org/t/get-set-gui-data-from-python/23256)

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**Author:** [@Marc-3d](https://discourse.slicer.org/u/Marc-3d)\
**Replies:** 4\
**Last updated:** [May 11, 2022, 4:02pm UTC](https://discourse.slicer.org/t/get-set-gui-data-from-python/23256 "2022-05-11T16:02:17Z")

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Hi everyone, I am trying write a Python script that accesses the “volume” node and “ROI” nodes that the user has manually selected in the “Volume Rendering” module. Does anyone have any clues on how to access this info…

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## [PRISM Rendering Chroma Depth Perception not working](https://discourse.slicer.org/t/prism-rendering-chroma-depth-perception-not-working/23361)

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**Author:** [@Connor-Bowley](https://discourse.slicer.org/u/Connor-Bowley)\
**Replies:** 3\
**Last updated:** [May 11, 2022, 3:08pm UTC](https://discourse.slicer.org/t/prism-rendering-chroma-depth-perception-not-working/23361 "2022-05-11T15:08:18Z")

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I am currently unable to use the Chroma Depth Perception with the sample data as per the tutorial. When looking at the error log, it is saying “Shader failed to compile”. @lassoan You were thinking it is likely an API c…

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## [How to Get table values](https://discourse.slicer.org/t/how-to-get-table-values/23320)

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**Author:** [@gfurnari](https://discourse.slicer.org/u/gfurnari)\
**Replies:** 2\
**Last updated:** [May 11, 2022, 1:54pm UTC](https://discourse.slicer.org/t/how-to-get-table-values/23320 "2022-05-11T13:54:01Z")

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Hi everyone, is it possible to get values from a table (already created ), using python code? Thank you very much for your help.

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## [PLY max file size or max number points](https://discourse.slicer.org/t/ply-max-file-size-or-max-number-points/23364)

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**Author:** [@ferhue](https://discourse.slicer.org/u/ferhue)\
**Replies:** 6\
**Last updated:** [May 11, 2022, 12:31pm UTC](https://discourse.slicer.org/t/ply-max-file-size-or-max-number-points/23364 "2022-05-11T12:31:09Z")

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Hello, I am planning to import some large PLY files into 3D Slicer and convert them to contours on top of a CT scan. I wanted to ask if there is any a priori limitation on the number of points or maximum file size of t…

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## [Issue loading .nii files onto 3D slicer ](https://discourse.slicer.org/t/issue-loading-nii-files-onto-3d-slicer/4378)

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**Author:** [@rjortiz2](https://discourse.slicer.org/u/rjortiz2)\
**Replies:** 6\
**Last updated:** [February 27, 2019, 10:32pm UTC](https://discourse.slicer.org/t/issue-loading-nii-files-onto-3d-slicer/4378 "2019-02-27T22:32:26Z")

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I am having issue loading/viewing my .nii files onto my computer. \*I was able to view and view my .nii files on itk snap, so it doesn’t seem to be a data problem I loaded some example .nii files that I downloaded onli…

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