# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=107

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

**Page:** 108

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## [Segmenting similar structures across multiple individuals](https://discourse.slicer.org/t/segmenting-similar-structures-across-multiple-individuals/34949)

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**Author:** [@bcolbert](https://discourse.slicer.org/u/bcolbert)\
**Replies:** 0\
**Last updated:** [March 18, 2024, 11:00am UTC](https://discourse.slicer.org/t/segmenting-similar-structures-across-multiple-individuals/34949 "2024-03-18T11:00:53Z")

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I am segmenting 7 pairs of structures in ~25 individuals to look at variation in shape of the structures and the system as a whole across individuals. Segmenting is time-consuming obviously and I was wondering if any pow…

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## [(Open)IGTlink supported modality vendor list](https://discourse.slicer.org/t/open-igtlink-supported-modality-vendor-list/34913)

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**Author:** [@jde](https://discourse.slicer.org/u/jde)\
**Replies:** 2\
**Last updated:** [March 18, 2024, 9:01am UTC](https://discourse.slicer.org/t/open-igtlink-supported-modality-vendor-list/34913 "2024-03-18T09:01:32Z")

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Hi, is there an uptodate list of hardware vendors that support OpenIGTlink? (I’d ask this on OpenIGTlink but it looks like the project itself is no longer alive, or at least the contact page is a dead link) I’m lookin…

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## [Computing Branch Angles using 'Geometric Analysis' section of VTMK in Slicer](https://discourse.slicer.org/t/computing-branch-angles-using-geometric-analysis-section-of-vtmk-in-slicer/34941)

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**Author:** [@bobcieri](https://discourse.slicer.org/u/bobcieri)\
**Replies:** 0\
**Last updated:** [March 18, 2024, 3:16am UTC](https://discourse.slicer.org/t/computing-branch-angles-using-geometric-analysis-section-of-vtmk-in-slicer/34941 "2024-03-18T03:16:54Z")

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Hello! I am trying to compute the bifurcation angles along a pulmonary tree using VMTK. I have been ridiculously unsuccessful getting VMTK to install directly on macOS using either the binary installers or from source. …

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## [A problem about  window\_leveling mapping issues](https://discourse.slicer.org/t/a-problem-about-window-leveling-mapping-issues/33419)

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**Author:** [@l\_xx](https://discourse.slicer.org/u/l_xx)\
**Replies:** 1\
**Last updated:** [March 17, 2024, 12:01pm UTC](https://discourse.slicer.org/t/a-problem-about-window-leveling-mapping-issues/33419 "2024-03-17T12:01:27Z")

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Is there any way to implement the mapping of my red arrows, and the CT displayed will still be normal? The top one was linearly mapped, but only the window level of the bone was left. What I need is the bottom result, th…

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## [Module to flip through connected components](https://discourse.slicer.org/t/module-to-flip-through-connected-components/34871)

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**Author:** [@rkraaijveld](https://discourse.slicer.org/u/rkraaijveld)\
**Replies:** 1\
**Last updated:** [March 17, 2024, 3:01am UTC](https://discourse.slicer.org/t/module-to-flip-through-connected-components/34871 "2024-03-17T03:01:19Z")

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Hi! I want to make a module where I first input a mask and get the connected components (with Islands for example). I then somehow want to flip through the islands using Previous/Next buttons and give each connected com…

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## [Converting PLY Mesh to 3mf](https://discourse.slicer.org/t/converting-ply-mesh-to-3mf/34879)

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**Author:** [@Chubby\_Chicken08](https://discourse.slicer.org/u/Chubby_Chicken08)\
**Replies:** 1\
**Last updated:** [March 17, 2024, 2:59am UTC](https://discourse.slicer.org/t/converting-ply-mesh-to-3mf/34879 "2024-03-17T02:59:54Z")

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How do I convert a PLY Mesh with color into a 3mf model that I can load into a PowerPoint while retaining color? When I open the PLY Mesh on PP it has no color, but when I open it on slicer it has color. I’m new to this,…

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## [Are measurements in slicer calculated by the DICOM file? How do you know it is accurate?](https://discourse.slicer.org/t/are-measurements-in-slicer-calculated-by-the-dicom-file-how-do-you-know-it-is-accurate/34887)

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**Author:** [@bw3232](https://discourse.slicer.org/u/bw3232)\
**Replies:** 1\
**Last updated:** [March 17, 2024, 2:09am UTC](https://discourse.slicer.org/t/are-measurements-in-slicer-calculated-by-the-dicom-file-how-do-you-know-it-is-accurate/34887 "2024-03-17T02:09:45Z")

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Hi All, When using 3d Slicer’s ruler/ markdown tools, I was wondering how the measurement is actually calculated. Is the relative scale captured in the DICOM file? (For example, how does 3D slicer know what 1mm is on ea…

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## [3D reconstruction fluoroscopic cholangiogram images](https://discourse.slicer.org/t/3d-reconstruction-fluoroscopic-cholangiogram-images/34905)

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**Author:** [@Marc\_eL](https://discourse.slicer.org/u/Marc_eL)\
**Replies:** 1\
**Last updated:** [March 17, 2024, 2:08am UTC](https://discourse.slicer.org/t/3d-reconstruction-fluoroscopic-cholangiogram-images/34905 "2024-03-17T02:08:38Z")

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Dear experts, For my project, I aim to perform a 3D reconstruction of liver ducts obtained through fluoroscopic images during retrograde endoscopic cholangiography. In most cases, both apiko-posterior and lateral images…

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## [how to get the difference between two geometries from two different scans](https://discourse.slicer.org/t/how-to-get-the-difference-between-two-geometries-from-two-different-scans/34906)

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**Author:** [@Clement\_Bouchard](https://discourse.slicer.org/u/Clement_Bouchard)\
**Replies:** 1\
**Last updated:** [March 17, 2024, 1:57am UTC](https://discourse.slicer.org/t/how-to-get-the-difference-between-two-geometries-from-two-different-scans/34906 "2024-03-17T01:57:40Z")

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Hello, I have two different tracheas, one completely open and the other closed with a collapse. I would like to get the difference between these volumes or try to move them. Ideally I’d like to be able to align my two s…

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## [3d lung vessels model](https://discourse.slicer.org/t/3d-lung-vessels-model/34354)

<div class="topic-metadata">

**Author:** [@Vikram](https://discourse.slicer.org/u/Vikram)\
**Replies:** 4\
**Last updated:** [March 16, 2024, 11:50am UTC](https://discourse.slicer.org/t/3d-lung-vessels-model/34354 "2024-03-16T11:50:36Z")

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I want to create 3d lung vessels tree model any one can help me please

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## [Slice thickness and kernel preference for 3D reconstruction](https://discourse.slicer.org/t/slice-thickness-and-kernel-preference-for-3d-reconstruction/34890)

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**Author:** [@D\_Dand](https://discourse.slicer.org/u/D_Dand)\
**Replies:** 1\
**Last updated:** [March 15, 2024, 7:26pm UTC](https://discourse.slicer.org/t/slice-thickness-and-kernel-preference-for-3d-reconstruction/34890 "2024-03-15T19:26:45Z")

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Hello everyone, Hope this post finds you well. We are planning to start a project for reconstructing human airways. And thus, we need to prepare a proposal for project to request CT-scan images. Would anyone please adv…

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## [Long loading time for DICOM folder. ](https://discourse.slicer.org/t/long-loading-time-for-dicom-folder/34915)

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**Author:** [@Frederik](https://discourse.slicer.org/u/Frederik)\
**Replies:** 1\
**Last updated:** [March 15, 2024, 6:52pm UTC](https://discourse.slicer.org/t/long-loading-time-for-dicom-folder/34915 "2024-03-15T18:52:21Z")

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Dear 3D Slicer Team. We are a small team who are currently segmenting and annotating data from a larger dataset containing CT Thorax DICOM containing Lung Nodules. First of all, we would like to express our gratitude. …

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## [Lung CT Segmenter now supports 'lungmask' AI for lung and lobe segmentation](https://discourse.slicer.org/t/lung-ct-segmenter-now-supports-lungmask-ai-for-lung-and-lobe-segmentation/25081)

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**Author:** [@rbumm](https://discourse.slicer.org/u/rbumm)\
**Replies:** 30\
**Last updated:** [January 29, 2024, 3:47pm UTC](https://discourse.slicer.org/t/lung-ct-segmenter-now-supports-lungmask-ai-for-lung-and-lobe-segmentation/25081 "2024-01-29T15:47:03Z")

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We have a new “experimental AI” option in Lung CT Segmenter for creating lung and lobe segmentations with minimal effort (one tracheal markup) on the fly. This feature involves Johannes Hofmanningers lungmask with permi…

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## [Cleaning elastix results](https://discourse.slicer.org/t/cleaning-elastix-results/34784)

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**Author:** [@Matteboo](https://discourse.slicer.org/u/Matteboo)\
**Replies:** 7\
**Last updated:** [March 15, 2024, 1:59pm UTC](https://discourse.slicer.org/t/cleaning-elastix-results/34784 "2024-03-15T13:59:26Z")

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Hello, I’ve been trying to use elastix to register some organs but I have a few issue. After registration, the results need “cleaning” (see picture where I registered a liver onto itself) I can fix it by doing some…

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## [My 3D Image dissapeared, how do I get it back?](https://discourse.slicer.org/t/my-3d-image-dissapeared-how-do-i-get-it-back/34903)

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**Author:** [@Amy\_g](https://discourse.slicer.org/u/Amy_g)\
**Replies:** 0\
**Last updated:** [March 15, 2024, 6:25am UTC](https://discourse.slicer.org/t/my-3d-image-dissapeared-how-do-i-get-it-back/34903 "2024-03-15T06:25:32Z")

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Hi! I had a 3d reconstruction on the top right corner and it just dissapeared, any ideas on how to get it back?

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## [Weird trouble with markups](https://discourse.slicer.org/t/weird-trouble-with-markups/34872)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 4\
**Last updated:** [March 14, 2024, 5:15pm UTC](https://discourse.slicer.org/t/weird-trouble-with-markups/34872 "2024-03-14T17:15:36Z")

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Hello, This repeatable crash is puzzling. It is seen with any markups node. Go to Markups module Pick any node Place one point in a slice view Go out of place mode Move the point in the slice view Close the scene …

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## [How to hold a displaynode using python?](https://discourse.slicer.org/t/how-to-hold-a-displaynode-using-python/34865)

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**Author:** [@ebin1234](https://discourse.slicer.org/u/ebin1234)\
**Replies:** 3\
**Last updated:** [March 14, 2024, 12:34pm UTC](https://discourse.slicer.org/t/how-to-hold-a-displaynode-using-python/34865 "2024-03-14T12:34:23Z")

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Hello, I have a doubt in holding a displaynode using python. I have two buttons and two displaynodes… Each button set visibility of each displaynode.I press first button. It will set visibility of corresponding display n…

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## [Shortcut to go to markup?](https://discourse.slicer.org/t/shortcut-to-go-to-markup/34886)

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**Author:** [@Inka\_Saraswati](https://discourse.slicer.org/u/Inka_Saraswati)\
**Replies:** 1\
**Last updated:** [March 14, 2024, 12:19pm UTC](https://discourse.slicer.org/t/shortcut-to-go-to-markup/34886 "2024-03-14T12:19:32Z")

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Hi, I’m new to Slicer. This is might be a stupid question but is there a way to quickly go to certain Markups (points, lines, etc) instead of scrolling through all the slices? Thank you!

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## [Generating thickness map](https://discourse.slicer.org/t/generating-thickness-map/34852)

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**Author:** [@Pol](https://discourse.slicer.org/u/Pol)\
**Replies:** 1\
**Last updated:** [March 13, 2024, 6:09pm UTC](https://discourse.slicer.org/t/generating-thickness-map/34852 "2024-03-13T18:09:25Z")

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I used the following method to generate a thickness ma of the left ventricular myocardium: Compute medial surface using Simple Filters module - BinaryThinningImageFilter. Compute distance map using Simple Filters modul…

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## [How to work with vtkParametricFunction in SlicerJupyter?](https://discourse.slicer.org/t/how-to-work-with-vtkparametricfunction-in-slicerjupyter/34833)

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**Author:** [@Juergen](https://discourse.slicer.org/u/Juergen)\
**Replies:** 2\
**Last updated:** [March 13, 2024, 5:15pm UTC](https://discourse.slicer.org/t/how-to-work-with-vtkparametricfunction-in-slicerjupyter/34833 "2024-03-13T17:15:14Z")

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Hello, This is a question not directly related to Slicer, however I am using the SlicerJupyter kernel to interface with vtk. I am trying to create my own parametric surface with the abstract class vtkParametricFunction…

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## [Segmenting outer heart walls + septum](https://discourse.slicer.org/t/segmenting-outer-heart-walls-septum/34860)

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**Author:** [@Marthe](https://discourse.slicer.org/u/Marthe)\
**Replies:** 0\
**Last updated:** [March 13, 2024, 10:00am UTC](https://discourse.slicer.org/t/segmenting-outer-heart-walls-septum/34860 "2024-03-13T10:00:36Z")

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Hi all! I am searching for a method to segment the outer heart walls + septum from the CTACardio data without heaving to segment all seperate heart chambers and heart walls. I was thinking to first segment the solid bod…

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## [Exporting stl of ROI of segmented ribcage](https://discourse.slicer.org/t/exporting-stl-of-roi-of-segmented-ribcage/34838)

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**Author:** [@Marthe](https://discourse.slicer.org/u/Marthe)\
**Replies:** 4\
**Last updated:** [March 13, 2024, 9:54am UTC](https://discourse.slicer.org/t/exporting-stl-of-roi-of-segmented-ribcage/34838 "2024-03-13T09:54:45Z")

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Dear all After segmenting the ribcage from the CTACardio data, I wondered how I can export an STL file only containing the part of the 3D ribcage structure indicated by the ROI? See attached screenshot to understand my …

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## [Plane and model intersection](https://discourse.slicer.org/t/plane-and-model-intersection/34713)

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**Author:** [@soukup.la](https://discourse.slicer.org/u/soukup.la)\
**Replies:** 3\
**Last updated:** [March 13, 2024, 7:47am UTC](https://discourse.slicer.org/t/plane-and-model-intersection/34713 "2024-03-13T07:47:59Z")

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Hello, I have cropped a surface model using the four planes. Now, I need to get curves or lines that correspond with the coroped model and the plane touch. So the model’s boundary edge is divided into four curves by the…

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## [How to get the coordinates of a point where a straight line intersects a blood vessel wall in 3DSLicer](https://discourse.slicer.org/t/how-to-get-the-coordinates-of-a-point-where-a-straight-line-intersects-a-blood-vessel-wall-in-3dslicer/34855)

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**Author:** [@huangrenyuan](https://discourse.slicer.org/u/huangrenyuan)\
**Replies:** 0\
**Last updated:** [March 13, 2024, 4:54am UTC](https://discourse.slicer.org/t/how-to-get-the-coordinates-of-a-point-where-a-straight-line-intersects-a-blood-vessel-wall-in-3dslicer/34855 "2024-03-13T04:54:43Z")

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The AB line segment passes through the blood vessel wall, and the intersection point with the blood vessel wall is F, if you want to get the RAS coordinates of the point F, how can I get it?

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## [Is there any demo for plug-in development based on 3dslicer?](https://discourse.slicer.org/t/is-there-any-demo-for-plug-in-development-based-on-3dslicer/34851)

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**Author:** [@huangrenyuan](https://discourse.slicer.org/u/huangrenyuan)\
**Replies:** 1\
**Last updated:** [March 12, 2024, 7:37pm UTC](https://discourse.slicer.org/t/is-there-any-demo-for-plug-in-development-based-on-3dslicer/34851 "2024-03-12T19:37:48Z")

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Original text请问有没有基于3dslicer进行插件开发的demo Operating system:windows10 Slicer version:5.0.3 Expected behavior: Actual behavior:

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## [Segment registration and measure distance with heat map](https://discourse.slicer.org/t/segment-registration-and-measure-distance-with-heat-map/34837)

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**Author:** [@sumerm](https://discourse.slicer.org/u/sumerm)\
**Replies:** 6\
**Last updated:** [March 12, 2024, 7:36pm UTC](https://discourse.slicer.org/t/segment-registration-and-measure-distance-with-heat-map/34837 "2024-03-12T19:36:55Z")

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Hello, I have preoperative and postoperative skull CTs, i also have STL files. I am trying to create a heat map according to distance between 2 models/segments. So which is the proper way to do it ? I have uploaded ST…

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## [Rendering Freesurfer regional volumes in Effect size or Z-score ColourMaps](https://discourse.slicer.org/t/rendering-freesurfer-regional-volumes-in-effect-size-or-z-score-colourmaps/11692)

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**Author:** [@p.wib](https://discourse.slicer.org/u/p.wib)\
**Replies:** 4\
**Last updated:** [March 12, 2024, 3:47pm UTC](https://discourse.slicer.org/t/rendering-freesurfer-regional-volumes-in-effect-size-or-z-score-colourmaps/11692 "2024-03-12T15:47:07Z")

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Hi I am analyzing the volume of 20 Freesurfer automated segmented structures, which can be visualized label statistics as per FreeSurfer’s atlas labels. As I have several MR subjects, groups and time points, without cr…

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## [How to calculate the signal-to-noise ratio of magnetic resonance image](https://discourse.slicer.org/t/how-to-calculate-the-signal-to-noise-ratio-of-magnetic-resonance-image/34845)

<div class="topic-metadata">

**Author:** [@chonglou](https://discourse.slicer.org/u/chonglou)\
**Replies:** 0\
**Last updated:** [March 12, 2024, 12:22pm UTC](https://discourse.slicer.org/t/how-to-calculate-the-signal-to-noise-ratio-of-magnetic-resonance-image/34845 "2024-03-12T12:22:25Z")

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Operating system: Slicer version:5.2.1 Expected behavior:How to calculate the signal-to-noise ratio of magnetic resonance image Actual behavior:

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## [Lung vessels model](https://discourse.slicer.org/t/lung-vessels-model/34743)

<div class="topic-metadata">

**Author:** [@Vikram](https://discourse.slicer.org/u/Vikram)\
**Replies:** 5\
**Last updated:** [March 12, 2024, 12:06pm UTC](https://discourse.slicer.org/t/lung-vessels-model/34743 "2024-03-12T12:06:54Z")

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I segmented lung vessels model by using 3d slicer but the problem is that i want to print this model but vessels are connected to each other , what i can do there is any other way to do. please help me struck in my resea…

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## [IGT volume reconstruction: Output spacing](https://discourse.slicer.org/t/igt-volume-reconstruction-output-spacing/34253)

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**Author:** [@Olivier](https://discourse.slicer.org/u/Olivier)\
**Replies:** 3\
**Last updated:** [March 12, 2024, 10:55am UTC](https://discourse.slicer.org/t/igt-volume-reconstruction-output-spacing/34253 "2024-03-12T10:55:00Z")

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Hello, I am using the Volume reconstruction feature from the IGT module and have a question about the Output spacing parameter specifically. I am using ultrasound data obtained from manual sweeps, about in the same dir…

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