# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=274

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

**Page:** 275

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## [Can't launch Slicer on Linux - failed to obtain launcher executable name](https://discourse.slicer.org/t/cant-launch-slicer-on-linux-failed-to-obtain-launcher-executable-name/2694)

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**Author:** [@MGM](https://discourse.slicer.org/u/MGM)\
**Replies:** 11\
**Last updated:** [April 27, 2018, 4:12pm UTC](https://discourse.slicer.org/t/cant-launch-slicer-on-linux-failed-to-obtain-launcher-executable-name/2694 "2018-04-27T16:12:19Z")

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Hi I can’t open Slicer on Ubuntu 16.04 64 bits : Linux 4.13.0-38-generic #43~16.04.1-Ubuntu SMP I tried 2 releases : 1- “Slicer-4.9.0-2018-04-25-linux-amd64” and " , I got this error : error: Failed to obtain launc…

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## [Automatic non-rigid (elastic) registration between 2 stl files](https://discourse.slicer.org/t/automatic-non-rigid-elastic-registration-between-2-stl-files/3298)

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**Author:** [@DavideBassano](https://discourse.slicer.org/u/DavideBassano)\
**Replies:** 8\
**Last updated:** [June 23, 2021, 1:05pm UTC](https://discourse.slicer.org/t/automatic-non-rigid-elastic-registration-between-2-stl-files/3298 "2021-06-23T13:05:17Z")

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Hello, I have 2 .stl volumes (let’s call them fixed and moving). I would like to warp the moving volume above the fixed volume with an automatic registration (so without fiducials, landmarks, … or with a very small num…

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## [Remove slices from volume](https://discourse.slicer.org/t/remove-slices-from-volume/18289)

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**Author:** [@anitakh1](https://discourse.slicer.org/u/anitakh1)\
**Replies:** 1\
**Last updated:** [June 23, 2021, 9:56am UTC](https://discourse.slicer.org/t/remove-slices-from-volume/18289 "2021-06-23T09:56:24Z")

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Dear sir. i have a volume of 587 slices (512X512) and I want to remove 200 slices of my choice by keeping dimensions same. How can I do this with 3D Slicer, please explain?

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## [Progressbar in 3D Slicer python script - how can I make it stay in foreground?](https://discourse.slicer.org/t/progressbar-in-3d-slicer-python-script-how-can-i-make-it-stay-in-foreground/18280)

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**Author:** [@rbumm](https://discourse.slicer.org/u/rbumm)\
**Replies:** 2\
**Last updated:** [June 23, 2021, 7:02am UTC](https://discourse.slicer.org/t/progressbar-in-3d-slicer-python-script-how-can-i-make-it-stay-in-foreground/18280 "2021-06-23T07:02:51Z")

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Hi, How can I make the progressbar created like this progressbar = slicer.util.createProgressDialog(windowTitle='Processing...', autoClose=False) progressbar.setCancelButton(None) progress =0 steps = 7 …

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## [System specifications](https://discourse.slicer.org/t/system-specifications/18276)

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**Author:** [@sarvpriya1985](https://discourse.slicer.org/u/sarvpriya1985)\
**Replies:** 7\
**Last updated:** [June 23, 2021, 4:31am UTC](https://discourse.slicer.org/t/system-specifications/18276 "2021-06-23T04:31:50Z")

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Hi all, I am trying to update my windows system for 3D processing, segmentation and virtual reality. I would like to know your opinion on graphics card. I am considering RTX5000 16 GB versus RTX600024 GB. Would like to …

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## [3D View interactive ROI Cropping](https://discourse.slicer.org/t/3d-view-interactive-roi-cropping/17735)

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**Author:** [@spycolyf](https://discourse.slicer.org/u/spycolyf)\
**Replies:** 44\
**Last updated:** [June 22, 2021, 6:31pm UTC](https://discourse.slicer.org/t/3d-view-interactive-roi-cropping/17735 "2021-06-22T18:31:15Z")

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@jamesobutler @jcfr @lassoan @pieper Could you point me to how I can enable interactive 3D cropping on a 3D rendering in 3D view with Python?

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## [Changing the image scrolling direction using the sliders](https://discourse.slicer.org/t/changing-the-image-scrolling-direction-using-the-sliders/18260)

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**Author:** [@spycolyf](https://discourse.slicer.org/u/spycolyf)\
**Replies:** 2\
**Last updated:** [June 22, 2021, 3:19pm UTC](https://discourse.slicer.org/t/changing-the-image-scrolling-direction-using-the-sliders/18260 "2021-06-22T15:19:08Z")

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One of my physician users stated that with most image viewers, the Axial image scroll bar scrolls from left to right displaying superior to inferior, respectively. For coronals and sagittals, from anterior to posterior (…

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## [Is there any way to separate Bronchopulmonary segments](https://discourse.slicer.org/t/is-there-any-way-to-separate-bronchopulmonary-segments/18267)

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**Author:** [@slicer365](https://discourse.slicer.org/u/slicer365)\
**Replies:** 2\
**Last updated:** [June 22, 2021, 3:04pm UTC](https://discourse.slicer.org/t/is-there-any-way-to-separate-bronchopulmonary-segments/18267 "2021-06-22T15:04:00Z")

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Is there any way to separate Bronchopulmonary segments as is shown in this pic.,not lung lobes!

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## [Export segmentation for finite element analysis](https://discourse.slicer.org/t/export-segmentation-for-finite-element-analysis/18252)

<div class="topic-metadata">

**Author:** [@L12](https://discourse.slicer.org/u/L12)\
**Replies:** 9\
**Last updated:** [June 21, 2021, 3:47pm UTC](https://discourse.slicer.org/t/export-segmentation-for-finite-element-analysis/18252 "2021-06-21T15:47:24Z")

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Hi, I converted my segmentation to an STL file and when I open it in a 3D viewer, the images overlap and just shows one segment. How do I save the exact same thing that appeared on my 3D slicer window? I have attached bo…

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## [Questionable performance on GPU workstation](https://discourse.slicer.org/t/questionable-performance-on-gpu-workstation/17140)

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**Author:** [@mluerig](https://discourse.slicer.org/u/mluerig)\
**Replies:** 5\
**Last updated:** [June 21, 2021, 3:44pm UTC](https://discourse.slicer.org/t/questionable-performance-on-gpu-workstation/17140 "2021-06-21T15:44:59Z")

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New user here. Basic I/O tasks like loading volumes, but also rendering models, selecting ROIs or working in the segmentation editor takes very long to complete, i.e. 10s of seconds to half a minute or more for a 1000x10…

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## [stl to labelmap does not work for reference volume](https://discourse.slicer.org/t/stl-to-labelmap-does-not-work-for-reference-volume/18248)

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**Author:** [@straj](https://discourse.slicer.org/u/straj)\
**Replies:** 1\
**Last updated:** [June 21, 2021, 1:32pm UTC](https://discourse.slicer.org/t/stl-to-labelmap-does-not-work-for-reference-volume/18248 "2021-06-21T13:32:23Z")

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Hi, I’m currently trying to convert an stl file to a binary labelmap, which seems to work fine as long as I do not choose a reference volume under ‘advanced’. If i do so, the labelmap which is created has the correct sp…

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## [Incorrect Date Sorting in DICOM database](https://discourse.slicer.org/t/incorrect-date-sorting-in-dicom-database/18250)

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**Author:** [@Alexander\_Ling](https://discourse.slicer.org/u/Alexander_Ling)\
**Replies:** 2\
**Last updated:** [June 21, 2021, 12:50pm UTC](https://discourse.slicer.org/t/incorrect-date-sorting-in-dicom-database/18250 "2021-06-21T12:50:47Z")

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When I try to sort images that I’ve loaded into 3DSlicer’s DICOM database by “Last study date”, the column is sorted alphabetically rather than by date (i.e. all of the images taken on Mondays at the top, then images tak…

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## [Build fails on Linux in python-ensurepip](https://discourse.slicer.org/t/build-fails-on-linux-in-python-ensurepip/17736)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 2\
**Last updated:** [June 21, 2021, 11:59am UTC](https://discourse.slicer.org/t/build-fails-on-linux-in-python-ensurepip/17736 "2021-06-21T11:59:29Z")

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Build fails on Linux in python-ensurepip I having this error since 9be0308d2 while building in Arch Linux : CMake Error at /home/arc/src/Slicer-SuperBuild/python-ensurepip-prefix/src/python-ensurepip-stamp/python-ensu…

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## [My segment is flipped when exported when opening in MRIcron](https://discourse.slicer.org/t/my-segment-is-flipped-when-exported-when-opening-in-mricron/18226)

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**Author:** [@pardisz](https://discourse.slicer.org/u/pardisz)\
**Replies:** 2\
**Last updated:** [June 21, 2021, 8:05am UTC](https://discourse.slicer.org/t/my-segment-is-flipped-when-exported-when-opening-in-mricron/18226 "2021-06-21T08:05:21Z")

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Hi I painted a segment using a template MRI scan and exported the segment using the same MRI scan as a reference. When I open the same scan in MRIcron and overlay it with the segment I have drawn I can see that it is fl…

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## [3d slicer 4.11.0](https://discourse.slicer.org/t/3d-slicer-4-11-0/18233)

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**Author:** [@Klakla](https://discourse.slicer.org/u/Klakla)\
**Replies:** 2\
**Last updated:** [June 21, 2021, 2:47am UTC](https://discourse.slicer.org/t/3d-slicer-4-11-0/18233 "2021-06-21T02:47:04Z")

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I just downloaded 3dslicer 4.11.0 but unfortunately it did not work… I would like to ask what are the requirements and memory space for the computer or laptop in order for the program to be downloaded and work well. Al…

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## [Brains registration error](https://discourse.slicer.org/t/brains-registration-error/18228)

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**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 1\
**Last updated:** [June 20, 2021, 3:07am UTC](https://discourse.slicer.org/t/brains-registration-error/18228 "2021-06-20T03:07:36Z")

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I am trying to register one mouse head to another. These two are about 180 rotated with respect to each other. So I had defined 4 Lms on both of them and used Fiducial registration (rigid) to roughly align them. For bett…

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## [Npy transform matrix](https://discourse.slicer.org/t/npy-transform-matrix/18152)

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**Author:** [@sfglio](https://discourse.slicer.org/u/sfglio)\
**Replies:** 5\
**Last updated:** [June 18, 2021, 11:45pm UTC](https://discourse.slicer.org/t/npy-transform-matrix/18152 "2021-06-18T23:45:07Z")

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When saving a transformation matrix in python as .npy or .txt, I get a different position in slicer when applying the transformation to a model node. I assume that there is a problem due to different coordinate system bu…

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## [Annotation Screenshot](https://discourse.slicer.org/t/annotation-screenshot/18217)

<div class="topic-metadata">

**Author:** [@Loc\_Tran](https://discourse.slicer.org/u/Loc_Tran)\
**Replies:** 2\
**Last updated:** [June 18, 2021, 9:41pm UTC](https://discourse.slicer.org/t/annotation-screenshot/18217 "2021-06-18T21:41:56Z")

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Hello, I followed the tutorial on Script repository — 3D Slicer documentation to write a python program to take a screenshot. However, The resolution of the screenshot is not very good. I notice that on Annotation Scree…

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## [Model Registration Module Error](https://discourse.slicer.org/t/model-registration-module-error/18191)

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**Author:** [@sfglio](https://discourse.slicer.org/u/sfglio)\
**Replies:** 4\
**Last updated:** [June 18, 2021, 8:43pm UTC](https://discourse.slicer.org/t/model-registration-module-error/18191 "2021-06-18T20:43:46Z")

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How can I fix the following error message? Traceback (most recent call last): File “/Applications/Slicer.app/Contents/Extensions-29959/SlicerIGT/lib/Slicer-4.13/qt-scripted-modules/ModelRegistration.py”, line 167, in o…

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## [As a doctor, I write a simple software for my pituitary tumor surgery](https://discourse.slicer.org/t/as-a-doctor-i-write-a-simple-software-for-my-pituitary-tumor-surgery/18207)

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**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Replies:** 2\
**Last updated:** [June 18, 2021, 8:21pm UTC](https://discourse.slicer.org/t/as-a-doctor-i-write-a-simple-software-for-my-pituitary-tumor-surgery/18207 "2021-06-18T20:21:25Z")

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As a doctor, I write a simple but useful software for my pituitary tumor surgery. Thank you very much. 3d slicer and vtk are very powerfull. Thanks, each friends from this forum.

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## [3D rotate and reslice](https://discourse.slicer.org/t/3d-rotate-and-reslice/18196)

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**Author:** [@Gisuk\_Hwang](https://discourse.slicer.org/u/Gisuk_Hwang)\
**Replies:** 1\
**Last updated:** [June 18, 2021, 8:07pm UTC](https://discourse.slicer.org/t/3d-rotate-and-reslice/18196 "2021-06-18T20:07:58Z")

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I have xray tomography data, but the scanned images are not upright (a few degree tilted from z axis). I would like to rotate to make my images ‘upright’ and reslice. Can fiji do this? If so, can you tell me how to do?

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## [Slow paint speed with large (10GB) volume](https://discourse.slicer.org/t/slow-paint-speed-with-large-10gb-volume/18195)

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**Author:** [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Replies:** 1\
**Last updated:** [June 18, 2021, 8:00pm UTC](https://discourse.slicer.org/t/slow-paint-speed-with-large-10gb-volume/18195 "2021-06-18T20:00:03Z")

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I have a colleague with a fairly large micro-CT scan (10GB), and he is experiencing sluggish response times when painting with a sphere brush in the 2D slices (Show 3D not enabled). His machine is windows with 128GB RAM.…

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## [QuadBuffer view in Slicer 4.11](https://discourse.slicer.org/t/quadbuffer-view-in-slicer-4-11/17508)

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**Author:** [@MarineC](https://discourse.slicer.org/u/MarineC)\
**Replies:** 14\
**Last updated:** [June 18, 2021, 7:50pm UTC](https://discourse.slicer.org/t/quadbuffer-view-in-slicer-4-11/17508 "2021-06-18T19:50:22Z")

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Hi everyone, I wanted to try the “quad buffer” display on Slicer 4.11.20210226 but unfortunatly it didn’t work for me… What I did was enabling Quad Buffer Stereo settings for my graphic card (AMD FirePro, using Win 10 …

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## [New feature: draw curve on surface](https://discourse.slicer.org/t/new-feature-draw-curve-on-surface/10431)

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**Author:** [@Sunderlandkyl](https://discourse.slicer.org/u/Sunderlandkyl)\
**Replies:** 10\
**Last updated:** [June 18, 2021, 7:46pm UTC](https://discourse.slicer.org/t/new-feature-draw-curve-on-surface/10431 "2021-06-18T19:46:43Z")

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In the latest 3D Slicer Preview Release, markup curves can now be drawn on surface of model nodes. This allows users to do measurements on surfaces or extract selected parts of a surface. By default, curve is created by …

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## [Smoothing multiple segments at once](https://discourse.slicer.org/t/smoothing-multiple-segments-at-once/15108)

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**Author:** [@Hannnonk](https://discourse.slicer.org/u/Hannnonk)\
**Replies:** 3\
**Last updated:** [June 18, 2021, 1:08pm UTC](https://discourse.slicer.org/t/smoothing-multiple-segments-at-once/15108 "2021-06-18T13:08:24Z")

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Doing a segmentation of jejunum. When I include the whole jejunum in one segment it “melts together”: So then I do it as separate segments. Works better but I get “seams” between segments.\\ I overlap the segments…

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## [Blurry Image When Uploading DICOM files into Slicer](https://discourse.slicer.org/t/blurry-image-when-uploading-dicom-files-into-slicer/18172)

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**Author:** [@joannecallow](https://discourse.slicer.org/u/joannecallow)\
**Replies:** 5\
**Last updated:** [June 17, 2021, 10:44pm UTC](https://discourse.slicer.org/t/blurry-image-when-uploading-dicom-files-into-slicer/18172 "2021-06-17T22:44:19Z")

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Operating system: macOS Catalina 10.15.1 Slicer version: 4.11 Expected behavior: Images upload clear Actual behavior: Images upload blurry and two errors showed up (when looking at the slices individually they are cle…

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## [Reorientate/Register/Align two segmentation models/STL Files](https://discourse.slicer.org/t/reorientate-register-align-two-segmentation-models-stl-files/18164)

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**Author:** [@Solli](https://discourse.slicer.org/u/Solli)\
**Replies:** 2\
**Last updated:** [June 17, 2021, 3:47pm UTC](https://discourse.slicer.org/t/reorientate-register-align-two-segmentation-models-stl-files/18164 "2021-06-17T15:47:48Z")

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Hello, I started working with slicer. I have two different CT Series from the skull. In both images i segmented the bones of the skull. Now i want to compare the model and calculate with the Module Segment comparison t…

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## [How to get the rotation angle after resliced the volume using two rotating orthogonal planes?](https://discourse.slicer.org/t/how-to-get-the-rotation-angle-after-resliced-the-volume-using-two-rotating-orthogonal-planes/18176)

<div class="topic-metadata">

**Author:** [@jumbojing](https://discourse.slicer.org/u/jumbojing)\
**Replies:** 7\
**Last updated:** [June 17, 2021, 2:50pm UTC](https://discourse.slicer.org/t/how-to-get-the-rotation-angle-after-resliced-the-volume-using-two-rotating-orthogonal-planes/18176 "2021-06-17T14:50:14Z")

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In SlicerHeart/SlicerHeart, I learned the reslicing the volume using two rotating orthogonal planes. That’s great! I want to know how to get the rotation angle after resliced the volume using two rotating orthogonal pl…

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## [Editing saved segmentations](https://discourse.slicer.org/t/editing-saved-segmentations/18179)

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**Author:** [@jimbo](https://discourse.slicer.org/u/jimbo)\
**Replies:** 1\
**Last updated:** [June 17, 2021, 1:33pm UTC](https://discourse.slicer.org/t/editing-saved-segmentations/18179 "2021-06-17T13:33:08Z")

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When opening a saved segmentation scene and trying to edit it with the segment editor, the error message: “AttributeError: ‘NoneType’ object has no attribute 'GetNumberOfValues” appears. Has anyone else experienced this…

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## [Fiducials- 2D projection](https://discourse.slicer.org/t/fiducials-2d-projection/18185)

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**Author:** [@Kruthi](https://discourse.slicer.org/u/Kruthi)\
**Replies:** 1\
**Last updated:** [June 17, 2021, 1:31pm UTC](https://discourse.slicer.org/t/fiducials-2d-projection/18185 "2021-06-17T13:31:28Z")

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Hello I have a question related to markups-fiducial 2D projection. I have placed certain fiducials (red cross) as shown in image1 , and enabled the 2D projection to locate those parts when I move the slices back and fo…

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