# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=311

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

**Page:** 312

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## [SlicerRT ERROR No image data in input volume #0](https://discourse.slicer.org/t/slicerrt-error-no-image-data-in-input-volume-0/11969)

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**Author:** [@annigilus](https://discourse.slicer.org/u/annigilus)\
**Replies:** 8\
**Last updated:** [November 15, 2020, 3:47am UTC](https://discourse.slicer.org/t/slicerrt-error-no-image-data-in-input-volume-0/11969 "2020-11-15T03:47:34Z")

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Greetings everyone! Trying to calculate dose, error appears. ERROR: No image data in nput volume #0 What is volume #0? Thank you!

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## [Phase Space file DICOM](https://discourse.slicer.org/t/phase-space-file-dicom/14609)

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**Author:** [@Space](https://discourse.slicer.org/u/Space)\
**Replies:** 0\
**Last updated:** [November 15, 2020, 3:36am UTC](https://discourse.slicer.org/t/phase-space-file-dicom/14609 "2020-11-15T03:36:27Z")

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Hi, what is the best way to project a phase space file onto a set of DICOM files to calculate dose. When I try this it results in many issues. I have folllowed many threads on problem solving, now I’d like to find out th…

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## [Phase Space file projected onto phantom](https://discourse.slicer.org/t/phase-space-file-projected-onto-phantom/14608)

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**Author:** [@Space](https://discourse.slicer.org/u/Space)\
**Replies:** 1\
**Last updated:** [November 15, 2020, 3:36am UTC](https://discourse.slicer.org/t/phase-space-file-projected-onto-phantom/14608 "2020-11-15T03:36:27Z")

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Hi, I have been trying to do an orthovoltage dose calculation using my own phase space file(s) and DICOM data sets in slicerRT. I have encountered alot of issues and errors. I am now wondering what is the simplest method…

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## [Cannot use public method of qMRMLNodeComboBox](https://discourse.slicer.org/t/cannot-use-public-method-of-qmrmlnodecombobox/14607)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 0\
**Last updated:** [November 15, 2020, 12:31am UTC](https://discourse.slicer.org/t/cannot-use-public-method-of-qmrmlnodecombobox/14607 "2020-11-15T00:31:26Z")

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Here there is a method called setShowHidden I try the following code in the python interactor and it doesn’t work and it should: inputComboBox = slicer.qMRMLNodeComboBox() inputComboBox.setShowHidden(False) It giv…

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## [Export to dicom for use in neuronavigation systems](https://discourse.slicer.org/t/export-to-dicom-for-use-in-neuronavigation-systems/14544)

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**Author:** [@Gaston](https://discourse.slicer.org/u/Gaston)\
**Replies:** 5\
**Last updated:** [November 14, 2020, 6:28pm UTC](https://discourse.slicer.org/t/export-to-dicom-for-use-in-neuronavigation-systems/14544 "2020-11-14T18:28:12Z")

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Hello, I am trying to export an image with its corresponding segmentation to dicom. But it is not possible for me to do it in any other format than DICOM RT. The idea is to be able to paint or segment structures and gen…

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## [error: GLSL 1.50 is not supported](https://discourse.slicer.org/t/error-glsl-1-50-is-not-supported/10083)

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**Author:** [@justauser](https://discourse.slicer.org/u/justauser)\
**Replies:** 10\
**Last updated:** [November 14, 2020, 4:42pm UTC](https://discourse.slicer.org/t/error-glsl-1-50-is-not-supported/10083 "2020-11-14T16:42:28Z")

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Operating system:CentOS-7.6 Slicer version: 4.11.0 nvidia driver 418.87, cuda 10.1 Expected behavior: displays a DICOM image Actual behavior:doesn’t display anything, and issues errors such as: error: GLSL 1.50 is n…

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## [4.11 and 4.10 show differences on loaded STL model and fiducial](https://discourse.slicer.org/t/4-11-and-4-10-show-differences-on-loaded-stl-model-and-fiducial/14593)

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**Author:** [@Bruce\_Wu](https://discourse.slicer.org/u/Bruce_Wu)\
**Replies:** 1\
**Last updated:** [November 14, 2020, 1:34pm UTC](https://discourse.slicer.org/t/4-11-and-4-10-show-differences-on-loaded-stl-model-and-fiducial/14593 "2020-11-14T13:34:21Z")

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Dear, I have a dental model (STL file) and a fiducial file (FCSV). In 4.10, all fiducials are on the model. However, in 4.11, the fiducials are in the air instead of on the model. It looks like the model has been transf…

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## [A challenge named diaphragm](https://discourse.slicer.org/t/a-challenge-named-diaphragm/14588)

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**Author:** [@luigi\_m](https://discourse.slicer.org/u/luigi_m)\
**Replies:** 4\
**Last updated:** [November 14, 2020, 9:57am UTC](https://discourse.slicer.org/t/a-challenge-named-diaphragm/14588 "2020-11-14T09:57:42Z")

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Dear all, I am trying to segment the diaphragm anatomical model from TC files. As you know, diaphragm is a very complex structure due to its muscular and fibrotic nature, its small thickness and the personal variations. …

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## [Could not load: 511: Vital Snapshot as a Scalar Volume](https://discourse.slicer.org/t/could-not-load-511-vital-snapshot-as-a-scalar-volume/14539)

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**Author:** [@Rocha\_Low](https://discourse.slicer.org/u/Rocha_Low)\
**Replies:** 6\
**Last updated:** [November 13, 2020, 7:51pm UTC](https://discourse.slicer.org/t/could-not-load-511-vital-snapshot-as-a-scalar-volume/14539 "2020-11-13T19:51:01Z")

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Hi, I’m curious and working on Slice. Can someone help me with this error. It’s a color image, can you give me the steps to correct this error? \[image\]

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## [Creating volumetric mesh with Segment Mesher - Clever-cli returned non-zero exit status](https://discourse.slicer.org/t/creating-volumetric-mesh-with-segment-mesher-clever-cli-returned-non-zero-exit-status/14585)

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**Author:** [@vincent.serantoni](https://discourse.slicer.org/u/vincent.serantoni)\
**Replies:** 2\
**Last updated:** [November 13, 2020, 5:37pm UTC](https://discourse.slicer.org/t/creating-volumetric-mesh-with-segment-mesher-clever-cli-returned-non-zero-exit-status/14585 "2020-11-13T17:37:15Z")

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Operating system: Windows 10 Slicer version: 4.10.2 Expected behavior: Creating volumetric mesh Actual behavior: Error: Command ‘cleaver-cli.exe’ returned non-zero exit status Hello everyone, I have a Nrrd file of a…

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## [Clip/crop segment with ROI in segment editor?](https://discourse.slicer.org/t/clip-crop-segment-with-roi-in-segment-editor/14575)

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**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 7\
**Last updated:** [November 13, 2020, 4:24pm UTC](https://discourse.slicer.org/t/clip-crop-segment-with-roi-in-segment-editor/14575 "2020-11-13T16:24:50Z")

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Often when I’m doing hand-segmentation of internal anatomy of various things, it’s useful to be able to cut the segmentation in half to double-check what it looks like “on the inside”. Is it possible to use an annotation…

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## [Automatic segmentation based on rgb](https://discourse.slicer.org/t/automatic-segmentation-based-on-rgb/14586)

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**Author:** [@Calumanderson5](https://discourse.slicer.org/u/Calumanderson5)\
**Replies:** 1\
**Last updated:** [November 13, 2020, 3:24pm UTC](https://discourse.slicer.org/t/automatic-segmentation-based-on-rgb/14586 "2020-11-13T15:24:25Z")

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Hello, Im using 3D slicer 4.10.2 I’ve done some annotations on qupath and now im looking at creating a 2d model of the annotations. I’ve attached a picture of the annotations. Is there a way to automatically segment…

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## [How to find area hit by cylindrical beam](https://discourse.slicer.org/t/how-to-find-area-hit-by-cylindrical-beam/14566)

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**Author:** [@muntahi398](https://discourse.slicer.org/u/muntahi398)\
**Replies:** 1\
**Last updated:** [November 13, 2020, 3:03pm UTC](https://discourse.slicer.org/t/how-to-find-area-hit-by-cylindrical-beam/14566 "2020-11-13T15:03:24Z")

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Hello good people, I have a structure obtained from CT. For Ramen scattering application total area hit by laser light is important as it is affecting the signal enhancement factor. In the picture red cylindrical shape …

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## [Default center of rotation](https://discourse.slicer.org/t/default-center-of-rotation/14584)

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**Author:** [@janneke\_slicer](https://discourse.slicer.org/u/janneke_slicer)\
**Replies:** 2\
**Last updated:** [November 13, 2020, 1:46pm UTC](https://discourse.slicer.org/t/default-center-of-rotation/14584 "2020-11-13T13:46:38Z")

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Hello, I am rotating an image in the Transforms module. I am wondering what the default center of rotation point is, and if I can extract that point in world coordinates? Or is this simply the image origin? Thank you. …

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## [New segment editing feature: Smoothing brush](https://discourse.slicer.org/t/new-segment-editing-feature-smoothing-brush/14577)

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**Author:** [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Replies:** 0\
**Last updated:** [November 13, 2020, 12:51am UTC](https://discourse.slicer.org/t/new-segment-editing-feature-smoothing-brush/14577 "2020-11-13T00:51:55Z")

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We added a new interactive smoothing brush tool to Segment editor. Select the smoothing effect and start “paint” in the slice or 3D views to smooth the highlighted region, while keeping the rest of the segment kept uncha…

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## [how can I get the Hounsfield Units from a DICOM file acquired by CB. The purpose of knowing this, it this is to analyze the bone density of both jaws for the correct planning of dental implants. Thank you.](https://discourse.slicer.org/t/how-can-i-get-the-hounsfield-units-from-a-dicom-file-acquired-by-cb-the-purpose-of-knowing-this-it-this-is-to-analyze-the-bone-density-of-both-jaws-for-the-correct-planning-of-dental-implants-thank-you/14574)

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**Author:** [@odonto100](https://discourse.slicer.org/u/odonto100)\
**Replies:** 1\
**Last updated:** [November 12, 2020, 9:29pm UTC](https://discourse.slicer.org/t/how-can-i-get-the-hounsfield-units-from-a-dicom-file-acquired-by-cb-the-purpose-of-knowing-this-it-this-is-to-analyze-the-bone-density-of-both-jaws-for-the-correct-planning-of-dental-implants-thank-you/14574 "2020-11-12T21:29:30Z")

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

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## [Slicer usage in the closed commercial product](https://discourse.slicer.org/t/slicer-usage-in-the-closed-commercial-product/14180)

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**Author:** [@a10227](https://discourse.slicer.org/u/a10227)\
**Replies:** 5\
**Last updated:** [November 12, 2020, 6:58pm UTC](https://discourse.slicer.org/t/slicer-usage-in-the-closed-commercial-product/14180 "2020-11-12T18:58:48Z")

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Good day, could you please tell me, is it possible to write an extension for slicer and use it in the closed commercial product? Are there any requirements/restrictions for that? I tried to figure it out myself but foun…

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## [DWI, DTI, Tractography](https://discourse.slicer.org/t/dwi-dti-tractography/14202)

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**Author:** [@Mohammed\_Alahmari](https://discourse.slicer.org/u/Mohammed_Alahmari)\
**Replies:** 5\
**Last updated:** [October 23, 2020, 10:31pm UTC](https://discourse.slicer.org/t/dwi-dti-tractography/14202 "2020-10-23T22:31:30Z")

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Operating system: Windows Slicer version: 4.11.0 Expected behavior: Actual behavior: Hi everyone , I have been given a new DWI project. The project compares different sequencing parameters to visualize the facial ne…

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## [Manual registration and warping of volume](https://discourse.slicer.org/t/manual-registration-and-warping-of-volume/14169)

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**Author:** [@opetne](https://discourse.slicer.org/u/opetne)\
**Replies:** 2\
**Last updated:** [November 12, 2020, 9:39am UTC](https://discourse.slicer.org/t/manual-registration-and-warping-of-volume/14169 "2020-11-12T09:39:16Z")

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Sorry if it has been mentioned before. I’m using Slicer for mainly anatomical 3D modeling. I do many CT and MR scans about the same specimen in the same position. I’d like to make manual “registration” of the volumes. DU…

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## [Oversampling and Spacing in crop](https://discourse.slicer.org/t/oversampling-and-spacing-in-crop/14549)

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**Author:** [@manjula](https://discourse.slicer.org/u/manjula)\
**Replies:** 1\
**Last updated:** [November 11, 2020, 9:47pm UTC](https://discourse.slicer.org/t/oversampling-and-spacing-in-crop/14549 "2020-11-11T21:47:21Z")

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Hi, Can someone please tell me how the oversampling actually works? As I understand oversampling or reducing the spacing scale \<1 in crop module will increase the image resolution and the image dimensions are increased …

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## [Creating a sequence of Volumes and labelmap overlaid](https://discourse.slicer.org/t/creating-a-sequence-of-volumes-and-labelmap-overlaid/14481)

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**Author:** [@OscarD](https://discourse.slicer.org/u/OscarD)\
**Replies:** 2\
**Last updated:** [November 11, 2020, 4:25pm UTC](https://discourse.slicer.org/t/creating-a-sequence-of-volumes-and-labelmap-overlaid/14481 "2020-11-11T16:25:45Z")

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Hello, slicers! Firstly, I am sorry if this is a naive question. I want to create a 3-Dimensional Time Lapse of 3D volumes with label maps overlaid at each time point. I have tried the following: I have a 4D (x,y,z…

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## [Change default Window/Level presets](https://discourse.slicer.org/t/change-default-window-level-presets/14545)

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**Author:** [@guitz](https://discourse.slicer.org/u/guitz)\
**Replies:** 0\
**Last updated:** [November 11, 2020, 3:44pm UTC](https://discourse.slicer.org/t/change-default-window-level-presets/14545 "2020-11-11T15:44:03Z")

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Hello! Is there a way to change the shortcuts allowing to change the Window/Level parameters as they can be found in the Volumes module under Display. On my system (slicer 4.11) they are from left to right: CT-bone, CT-…

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## [How to normalize MRI images using Slicer?](https://discourse.slicer.org/t/how-to-normalize-mri-images-using-slicer/14520)

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**Author:** [@Eshani](https://discourse.slicer.org/u/Eshani)\
**Replies:** 2\
**Last updated:** [November 11, 2020, 12:50pm UTC](https://discourse.slicer.org/t/how-to-normalize-mri-images-using-slicer/14520 "2020-11-11T12:50:48Z")

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Hi! I am using the Slicer 4.10.2 version to segment only the eyeball in my MRI images. So, I want to know the simplest way of preprocessing/normalizing of brain MRI images as I don’t have any knowledge regarding python …

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## [Surgical planning for lumbar screw placement.](https://discourse.slicer.org/t/surgical-planning-for-lumbar-screw-placement/14538)

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**Author:** [@roger\_hightower](https://discourse.slicer.org/u/roger_hightower)\
**Replies:** 1\
**Last updated:** [November 11, 2020, 8:31am UTC](https://discourse.slicer.org/t/surgical-planning-for-lumbar-screw-placement/14538 "2020-11-11T08:31:23Z")

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Hi, Is there any way to use Slicer 3D for surgical planning of the placement of a lumbar screw? I would like to be able to easily mark up the screw insertion pathway on axial and coronal sections – while being able to a…

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## [Distance between two segments](https://discourse.slicer.org/t/distance-between-two-segments/4910)

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**Author:** [@torquil](https://discourse.slicer.org/u/torquil)\
**Replies:** 14\
**Last updated:** [November 11, 2020, 1:35am UTC](https://discourse.slicer.org/t/distance-between-two-segments/4910 "2020-11-11T01:35:35Z")

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Hi! How do I get Slicer to calculate the distance between two segments in 3d space? By fiddling with the ruler endpoints I cannot be sure that I’m acually measuring the minimum distance between the segments, and it is a…

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## [Implicit representation of the segmentation](https://discourse.slicer.org/t/implicit-representation-of-the-segmentation/14531)

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**Author:** [@Tekk\_ya](https://discourse.slicer.org/u/Tekk_ya)\
**Replies:** 1\
**Last updated:** [November 10, 2020, 10:01pm UTC](https://discourse.slicer.org/t/implicit-representation-of-the-segmentation/14531 "2020-11-10T22:01:37Z")

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Hi everyone, I was wondering if I can get an implicit representation of a segmented geometry in the 3DSlicer and do morphological or logical operations between two implicit functions such as union, growing, etc. I am al…

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## [Convert STL file back to an NRRD format](https://discourse.slicer.org/t/convert-stl-file-back-to-an-nrrd-format/14418)

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**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Replies:** 1\
**Last updated:** [November 10, 2020, 9:31pm UTC](https://discourse.slicer.org/t/convert-stl-file-back-to-an-nrrd-format/14418 "2020-11-10T21:31:47Z")

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Is it possible to convert an STL file back into an NDDR format so that, for example, the wall thickness can be adjusted again? I know that you can save it as a lumen, but this takes a lot of time (Croped Volume). If I …

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## [Measurement of the vessel wall thickness](https://discourse.slicer.org/t/measurement-of-the-vessel-wall-thickness/14337)

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**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Replies:** 4\
**Last updated:** [November 10, 2020, 9:28pm UTC](https://discourse.slicer.org/t/measurement-of-the-vessel-wall-thickness/14337 "2020-11-10T21:28:59Z")

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I still have problems measuring my vessel wall thickness. Can you make marker points smaller so that a more precise measurement is possible? Due to the large marking points, there is also a great risk of measurement devi…

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## [Fusion of two adjacent parts of the vessel](https://discourse.slicer.org/t/fusion-of-two-adjacent-parts-of-the-vessel/14443)

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**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\
**Replies:** 1\
**Last updated:** [November 10, 2020, 9:15pm UTC](https://discourse.slicer.org/t/fusion-of-two-adjacent-parts-of-the-vessel/14443 "2020-11-10T21:15:18Z")

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Hello everyone, I have the following problem, which I would like to clarify with the help of the attached pictures: The top picture shows the lumen of the vessel. Two vascular branches branch off in the area of the …

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## [Clone of model node can change the original model node](https://discourse.slicer.org/t/clone-of-model-node-can-change-the-original-model-node/14521)

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**Author:** [@ungi](https://discourse.slicer.org/u/ungi)\
**Replies:** 1\
**Last updated:** [November 10, 2020, 7:22pm UTC](https://discourse.slicer.org/t/clone-of-model-node-can-change-the-original-model-node/14521 "2020-11-10T19:22:40Z")

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Tested on Windows with latest stable (4.11.20200930) version. How to reproduce: Load or create a surface model node. Clone it in the Data module Create a transform node for the clone (model copy) and move it somewhere…

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