# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=132

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

**Page:** 133

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## [Superimposing Dental Models](https://discourse.slicer.org/t/superimposing-dental-models/32501)

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**Author:** [@Mohammed\_Abdul\_Majee](https://discourse.slicer.org/u/Mohammed_Abdul_Majee)\
**Replies:** 1\
**Last updated:** [October 31, 2023, 7:48pm UTC](https://discourse.slicer.org/t/superimposing-dental-models/32501 "2023-10-31T19:48:51Z")

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Is there any way I can superimpose a PLY or OBJ dental model on another STL model without having to convert the PLY to STL?

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## [PseudoLMGenerator - unit of Landmarks generated](https://discourse.slicer.org/t/pseudolmgenerator-unit-of-landmarks-generated/32508)

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**Author:** [@Vignesh\_Chakravarthy](https://discourse.slicer.org/u/Vignesh_Chakravarthy)\
**Replies:** 6\
**Last updated:** [October 31, 2023, 7:31pm UTC](https://discourse.slicer.org/t/pseudolmgenerator-unit-of-landmarks-generated/32508 "2023-10-31T19:31:21Z")

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Hi Dr. Murat, I am using PseudoLMGenerator to get landmarks on the prostate model (slicer 5.2.2). I am attaching the details of the model for reference (surface area and volume are calculated in mm2 and mm3 respectively…

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## [Rotating view is too fast](https://discourse.slicer.org/t/rotating-view-is-too-fast/32510)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 1\
**Last updated:** [October 31, 2023, 7:32pm UTC](https://discourse.slicer.org/t/rotating-view-is-too-fast/32510 "2023-10-31T19:32:20Z")

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the rotating view is too fast, no idea why I didn’t select anything different this time

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## [Grow from seeds does not work if painting only one segment](https://discourse.slicer.org/t/grow-from-seeds-does-not-work-if-painting-only-one-segment/32452)

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**Author:** [@Investigacion\_y\_des1](https://discourse.slicer.org/u/Investigacion_y_des1)\
**Replies:** 6\
**Last updated:** [October 31, 2023, 3:20pm UTC](https://discourse.slicer.org/t/grow-from-seeds-does-not-work-if-painting-only-one-segment/32452 "2023-10-31T15:20:27Z")

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Hello! Im having trouble with Grow From Seeds. Basically, sometimes it works… sometimes it doesnt. Im about to give up and start working with some other software. Does it happen to any of you, with this option? I will gl…

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## [Accuracy evaluation](https://discourse.slicer.org/t/accuracy-evaluation/32460)

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**Author:** [@Caterina](https://discourse.slicer.org/u/Caterina)\
**Replies:** 4\
**Last updated:** [October 31, 2023, 12:55pm UTC](https://discourse.slicer.org/t/accuracy-evaluation/32460 "2023-10-31T12:55:45Z")

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Dear support, I would like to know if there is a way to evaluate the accuracy of segmentation. I mean that I need a quantitative measure of how accurate the segmentation is. Thanks

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## [Are all bones modelled in 3D Slicer hollow? I need to use them for FEA.](https://discourse.slicer.org/t/are-all-bones-modelled-in-3d-slicer-hollow-i-need-to-use-them-for-fea/31865)

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**Author:** [@Danieal\_Ahmad](https://discourse.slicer.org/u/Danieal_Ahmad)\
**Replies:** 10\
**Last updated:** [October 31, 2023, 11:08am UTC](https://discourse.slicer.org/t/are-all-bones-modelled-in-3d-slicer-hollow-i-need-to-use-them-for-fea/31865 "2023-10-31T11:08:52Z")

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Hi, I’ve been working on Femur and Tibia bones from a CT scan. I managed to model them out pretty well. However when I played around the 3D space to look inside the bones, they seem to be empty. Are all bones modelled i…

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## [Failed to get TotalSegmentator package version on macOS](https://discourse.slicer.org/t/failed-to-get-totalsegmentator-package-version-on-macos/32492)

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**Author:** [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Replies:** 4\
**Last updated:** [October 30, 2023, 7:48pm UTC](https://discourse.slicer.org/t/failed-to-get-totalsegmentator-package-version-on-macos/32492 "2023-10-30T19:48:20Z")

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FYI - on a Mac, when I push the button to get package version information, I am getting this error: Traceback: Traceback (most recent call last): File "/Applications/Slicer 2.app/Contents/bin/Python/slicer/util.py…

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## [How to reduce lung segmentation time?](https://discourse.slicer.org/t/how-to-reduce-lung-segmentation-time/31799)

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**Author:** [@mikiN](https://discourse.slicer.org/u/mikiN)\
**Replies:** 10\
**Last updated:** [October 30, 2023, 5:50pm UTC](https://discourse.slicer.org/t/how-to-reduce-lung-segmentation-time/31799 "2023-10-30T17:50:18Z")

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When using the AI function of CTlungsegmentation (lungmask R231CovidWeb), segmentation takes more than 3 minutes. The spec of the PC used is RTX3050ti 4GB. What can I improve?

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## [Link on slicer.org documention does not work](https://discourse.slicer.org/t/link-on-slicer-org-documention-does-not-work/32482)

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**Author:** [@aaron.b.tanenbaum](https://discourse.slicer.org/u/aaron.b.tanenbaum)\
**Replies:** 3\
**Last updated:** [October 30, 2023, 4:05pm UTC](https://discourse.slicer.org/t/link-on-slicer-org-documention-does-not-work/32482 "2023-10-30T16:05:56Z")

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Hello Y’all, I just wanted to point out the a link in the webpage here done not work. The link is in the custom LUT section in the second bullet-point for creating a custom LUT. Thank you

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## [How to reduce size of exported STL files?](https://discourse.slicer.org/t/how-to-reduce-size-of-exported-stl-files/32481)

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**Author:** [@lhefeng662](https://discourse.slicer.org/u/lhefeng662)\
**Replies:** 1\
**Last updated:** [October 30, 2023, 3:52pm UTC](https://discourse.slicer.org/t/how-to-reduce-size-of-exported-stl-files/32481 "2023-10-30T15:52:31Z")

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How does slicer perform image compression similar to the Simplification: Quadric Edge Collapse Decision function of Meshlab to reduce the size of exported stl files?

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## [I would like to ask a question about some ways to use Markups](https://discourse.slicer.org/t/i-would-like-to-ask-a-question-about-some-ways-to-use-markups/32443)

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**Author:** [@yeong9316](https://discourse.slicer.org/u/yeong9316)\
**Replies:** 1\
**Last updated:** [October 30, 2023, 1:07pm UTC](https://discourse.slicer.org/t/i-would-like-to-ask-a-question-about-some-ways-to-use-markups/32443 "2023-10-30T13:07:21Z")

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I would like to ask a question about some ways to use Marksup. When using Plane among the Marksup items, I would like to know how to change the angle of the plane created first. For example, what should I do if I want…

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## [6 DOF digitizers and Slicer](https://discourse.slicer.org/t/6-dof-digitizers-and-slicer/8888)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 6\
**Last updated:** [October 30, 2023, 11:47am UTC](https://discourse.slicer.org/t/6-dof-digitizers-and-slicer/8888 "2023-10-30T11:47:08Z")

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In the early days of 3D morphometrics, people used 3D digitizers like this (https://www.aniwaa.com/product/3d-scanners/microscribe-g2x/) to collect 3D coordinates of landmarks directly from museum specimens. While things…

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## [How can i increase t1 mr images count](https://discourse.slicer.org/t/how-can-i-increase-t1-mr-images-count/32454)

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**Author:** [@Rumeysa\_UZUMCUOGLU](https://discourse.slicer.org/u/Rumeysa_UZUMCUOGLU)\
**Replies:** 1\
**Last updated:** [October 28, 2023, 4:03pm UTC](https://discourse.slicer.org/t/how-can-i-increase-t1-mr-images-count/32454 "2023-10-28T16:03:42Z")

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Hello, how can I increase the number of slices of my T1 MR images in the 3D slicer application?

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## [Loading images and segmentation in Slicer v.s. ITKSNAP](https://discourse.slicer.org/t/loading-images-and-segmentation-in-slicer-v-s-itksnap/32441)

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**Author:** [@Chenglin\_Zhu](https://discourse.slicer.org/u/Chenglin_Zhu)\
**Replies:** 3\
**Last updated:** [October 27, 2023, 9:59pm UTC](https://discourse.slicer.org/t/loading-images-and-segmentation-in-slicer-v-s-itksnap/32441 "2023-10-27T21:59:39Z")

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Hi all, I am wondering what is the differences between Slicer and ITKSNAP when loading images and segmentation. Here are the snapshot of dicom images and auto-segmentation based on the nifti image (using dcm2nii conv…

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## [The angle beteen two planes](https://discourse.slicer.org/t/the-angle-beteen-two-planes/1404)

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**Author:** [@doc-xie](https://discourse.slicer.org/u/doc-xie)\
**Replies:** 1\
**Last updated:** [October 27, 2023, 9:11am UTC](https://discourse.slicer.org/t/the-angle-beteen-two-planes/1404 "2023-10-27T09:11:28Z")

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Hello, In general,there is only one angle between two planes. In the Angle Planes module,after I calculated the angle between two planes,I got three numbers(Pitch,yaw,roll),what is the meaning about the angles respectiv…

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## [Creating a line between already made mark up points](https://discourse.slicer.org/t/creating-a-line-between-already-made-mark-up-points/19648)

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**Author:** [@mohammed\_alshakhas](https://discourse.slicer.org/u/mohammed_alshakhas)\
**Replies:** 5\
**Last updated:** [October 27, 2023, 6:56am UTC](https://discourse.slicer.org/t/creating-a-line-between-already-made-mark-up-points/19648 "2023-10-27T06:56:18Z")

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I’m trying to draw lines exactly where I placed some markup points is there a way to define a line or plane according to already placed mark-up points? thanks

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## [MATLAB variable to 3D slicer](https://discourse.slicer.org/t/matlab-variable-to-3d-slicer/29823)

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**Author:** [@Sbeta](https://discourse.slicer.org/u/Sbeta)\
**Replies:** 4\
**Last updated:** [October 27, 2023, 3:42am UTC](https://discourse.slicer.org/t/matlab-variable-to-3d-slicer/29823 "2023-10-27T03:42:48Z")

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I am a new learner. I have processed the 3D PET image variable in .mat format and I want to download it as a volume in the 3D slicer for registration with CT. How to do that while keeping the same voxel size of 3D PET? T…

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## [Seeking help on fish bone density measurement](https://discourse.slicer.org/t/seeking-help-on-fish-bone-density-measurement/26671)

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**Author:** [@tinacai](https://discourse.slicer.org/u/tinacai)\
**Replies:** 5\
**Last updated:** [October 27, 2023, 12:40am UTC](https://discourse.slicer.org/t/seeking-help-on-fish-bone-density-measurement/26671 "2023-10-27T00:40:27Z")

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Hello 3D Slicer Community, I am a new user of 3D Slicer and am trying to measure bone density of fish across species, I am wondering if any one has any suggestion of resources that I could look into as a starting point …

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## [Create a preset in volume rendering module](https://discourse.slicer.org/t/create-a-preset-in-volume-rendering-module/5227)

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**Author:** [@maxaerosat.co.za](https://discourse.slicer.org/u/maxaerosat.co.za)\
**Replies:** 7\
**Last updated:** [October 26, 2023, 11:47pm UTC](https://discourse.slicer.org/t/create-a-preset-in-volume-rendering-module/5227 "2023-10-26T23:47:35Z")

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Just started on slicer and manage to do volume rendering of data I would like to have an additional preset(s} to be created and available with all the colours set to white and shading set “off” that will make it easie…

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## [Seeking Guidance on Ventricle Shape Analysis in 3D Slicer](https://discourse.slicer.org/t/seeking-guidance-on-ventricle-shape-analysis-in-3d-slicer/32364)

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**Author:** [@Julius\_Bogomolovas](https://discourse.slicer.org/u/Julius_Bogomolovas)\
**Replies:** 4\
**Last updated:** [October 26, 2023, 8:47pm UTC](https://discourse.slicer.org/t/seeking-guidance-on-ventricle-shape-analysis-in-3d-slicer/32364 "2023-10-26T20:47:16Z")

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Hello 3D Slicer community, First and foremost, I’d like to express my gratitude for your dedication to developing and maintaining this powerful set of tools for shape analysis. So this is gonna be a multifaceted post, b…

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## [How to unmerge NIFTI (nii.gz) files?](https://discourse.slicer.org/t/how-to-unmerge-nifti-nii-gz-files/32433)

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**Author:** [@isaacrods](https://discourse.slicer.org/u/isaacrods)\
**Replies:** 0\
**Last updated:** [October 26, 2023, 8:01pm UTC](https://discourse.slicer.org/t/how-to-unmerge-nifti-nii-gz-files/32433 "2023-10-26T20:01:10Z")

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Hello everyone, I’m currently working on Radiomics. To do this, I set up a directory where I stored MRI scans in one folder, and segmented tumors (labels or masks) in another. Despite segmenting and saving everything…

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## [.vtk export misalignment with CT scans](https://discourse.slicer.org/t/vtk-export-misalignment-with-ct-scans/30416)

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**Author:** [@William\_Kuo](https://discourse.slicer.org/u/William_Kuo)\
**Replies:** 9\
**Last updated:** [October 26, 2023, 7:17pm UTC](https://discourse.slicer.org/t/vtk-export-misalignment-with-ct-scans/30416 "2023-10-26T19:17:53Z")

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Hi! I have been using Slicer for a while but I am still unfamiliar with some issues. When I export my CT scans as a .vtk file and reimport them into Slicer and compare them with my CT scans, they don’t align. This is a …

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## [Installing Slicer Extensions from cmd with python](https://discourse.slicer.org/t/installing-slicer-extensions-from-cmd-with-python/32017)

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**Author:** [@wesselk](https://discourse.slicer.org/u/wesselk)\
**Replies:** 7\
**Last updated:** [October 26, 2023, 6:58pm UTC](https://discourse.slicer.org/t/installing-slicer-extensions-from-cmd-with-python/32017 "2023-10-26T18:58:51Z")

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Hello, I am working on moving a Slicer routine from my work computer to the machine it will be deployed on. Unfortunately the machine is headless and my employer has a very sensitive firewall preventing extensions from …

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## [I can’t normally open a volume in 3D Slicer scanned with a Morita CT scanner](https://discourse.slicer.org/t/i-can-t-normally-open-a-volume-in-3d-slicer-scanned-with-a-morita-ct-scanner/32429)

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**Author:** [@cepcep](https://discourse.slicer.org/u/cepcep)\
**Replies:** 0\
**Last updated:** [October 26, 2023, 5:55pm UTC](https://discourse.slicer.org/t/i-can-t-normally-open-a-volume-in-3d-slicer-scanned-with-a-morita-ct-scanner/32429 "2023-10-26T17:55:23Z")

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I saw your recommendation from 2017 to open Morita volumes using an nhdr file Next, in my .vol file i saw min and max XYZ and summed them up. Getting three numbers 643,704,704 for “sizes:” But although 3D SLicer began…

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## [Linux specific error placing plane markup](https://discourse.slicer.org/t/linux-specific-error-placing-plane-markup/32428)

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**Author:** [@smrolfe](https://discourse.slicer.org/u/smrolfe)\
**Replies:** 0\
**Last updated:** [October 26, 2023, 5:50pm UTC](https://discourse.slicer.org/t/linux-specific-error-placing-plane-markup/32428 "2023-10-26T17:50:03Z")

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I’m getting an error placing a plane markup when running on a Linux OS. I first noticed the bug using an older version (5.3.0) but it also exists on the latest nightly build. When I use either button to create a plane, t…

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## [How to unload a volume from the 3D View](https://discourse.slicer.org/t/how-to-unload-a-volume-from-the-3d-view/32309)

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**Author:** [@Deep\_Learning](https://discourse.slicer.org/u/Deep_Learning)\
**Replies:** 6\
**Last updated:** [October 26, 2023, 5:36pm UTC](https://discourse.slicer.org/t/how-to-unload-a-volume-from-the-3d-view/32309 "2023-10-26T17:36:00Z")

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After dragging a volume/node to the 3D view for volume rendering, is it possible to remove/unload it with the mouse? I want it to be visible in the 2D views, just not rendered, so turning off visibility is not an option…

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## [Creating a hemisphere mask](https://discourse.slicer.org/t/creating-a-hemisphere-mask/32427)

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**Author:** [@e0032127](https://discourse.slicer.org/u/e0032127)\
**Replies:** 0\
**Last updated:** [October 26, 2023, 5:16pm UTC](https://discourse.slicer.org/t/creating-a-hemisphere-mask/32427 "2023-10-26T17:16:00Z")

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Hello everyone! I’m currently studying the effects of chemoradiotherapy on healthy brain tissues in a population of brain tumours, and I am trying to segment out the healthy tissues. However, I notice that some tumour s…

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## [How to create 3D binary mask from 3D CT image? ](https://discourse.slicer.org/t/how-to-create-3d-binary-mask-from-3d-ct-image/32317)

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**Author:** [@Debapriya](https://discourse.slicer.org/u/Debapriya)\
**Replies:** 3\
**Last updated:** [October 26, 2023, 1:40pm UTC](https://discourse.slicer.org/t/how-to-create-3d-binary-mask-from-3d-ct-image/32317 "2023-10-26T13:40:55Z")

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Hello, I am new to 3D Slicer. I have 3D CT images of the brain in dicom format. I want to segment certain regions of the brain, and create 3D binary masks of those regions. Is there any provision of doing that in 3D Sl…

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## [Inserting a unique Module to Pipeline Creator](https://discourse.slicer.org/t/inserting-a-unique-module-to-pipeline-creator/31794)

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**Author:** [@scottcollins3d](https://discourse.slicer.org/u/scottcollins3d)\
**Replies:** 11\
**Last updated:** [October 26, 2023, 12:12pm UTC](https://discourse.slicer.org/t/inserting-a-unique-module-to-pipeline-creator/31794 "2023-10-26T12:12:32Z")

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Hello. Is there a way to insert unique module into the Pipeline Creator extension? Specifically, I would like to add Volume Clip With Model as a custom step in a pipeline. Thanks.

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## [How can I save a 2D cropped image and remove the black background?](https://discourse.slicer.org/t/how-can-i-save-a-2d-cropped-image-and-remove-the-black-background/32393)

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**Author:** [@Kelly\_Lee](https://discourse.slicer.org/u/Kelly_Lee)\
**Replies:** 6\
**Last updated:** [October 26, 2023, 7:55am UTC](https://discourse.slicer.org/t/how-can-i-save-a-2d-cropped-image-and-remove-the-black-background/32393 "2023-10-26T07:55:15Z")

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I have cropped an image using the “crop volume” function, and now I want to save it as a 2D image in a PNG file. How can I save it, and make sure that the background isn’t black like in the image? thanks!

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