# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=378

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

**Page:** 379

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## [2d superpose with the 3d segment editor](https://discourse.slicer.org/t/2d-superpose-with-the-3d-segment-editor/7689)

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**Author:** [@Jmarcs](https://discourse.slicer.org/u/Jmarcs)\
**Replies:** 1\
**Last updated:** [July 19, 2019, 8:55pm UTC](https://discourse.slicer.org/t/2d-superpose-with-the-3d-segment-editor/7689 "2019-07-19T20:55:56Z")

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Is it possible to match a photo or an import picture with the 3d segment . I would like to match a picture of a patient with the 3d segment Thanks a lot

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## [Older nightly builds](https://discourse.slicer.org/t/older-nightly-builds/7688)

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**Author:** [@tbillah](https://discourse.slicer.org/u/tbillah)\
**Replies:** 2\
**Last updated:** [July 19, 2019, 8:50pm UTC](https://discourse.slicer.org/t/older-nightly-builds/7688 "2019-07-19T20:50:14Z")

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https://download.slicer.org/ There is a older releases link under Stable Release. Are there older nightly builds as well? I am looking for a build from November to understand how a module of my interest has evolved.

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## [Slicer Tractography ROI Selection Not Working](https://discourse.slicer.org/t/slicer-tractography-roi-selection-not-working/7537)

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**Author:** [@cindy](https://discourse.slicer.org/u/cindy)\
**Replies:** 14\
**Last updated:** [July 19, 2019, 7:12pm UTC](https://discourse.slicer.org/t/slicer-tractography-roi-selection-not-working/7537 "2019-07-19T19:12:33Z")

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Hi. I’ve been following the Slicer tutorial: 5.1.6 Fiber Bundle Volume Measurement When I try to run tractography ROI selection, I get the following error: Tractography ROI Selection standard error: dyld: Library not …

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## [Abdominal CT registration using Elastix](https://discourse.slicer.org/t/abdominal-ct-registration-using-elastix/7387)

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**Author:** [@AVLguru](https://discourse.slicer.org/u/AVLguru)\
**Replies:** 7\
**Last updated:** [July 19, 2019, 11:51am UTC](https://discourse.slicer.org/t/abdominal-ct-registration-using-elastix/7387 "2019-07-19T11:51:09Z")

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## [Welcome dialog keeps reappearing](https://discourse.slicer.org/t/welcome-dialog-keeps-reappearing/7680)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 3\
**Last updated:** [July 19, 2019, 6:21am UTC](https://discourse.slicer.org/t/welcome-dialog-keeps-reappearing/7680 "2019-07-19T06:21:49Z")

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A brief intrusion in this thread. The ‘Don’t show again and always OK’ checkbox does not work on Slicer at start and on exit, if no old configuration directory exists. At least on Linux. You may test after mv $HOME/…

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## [Can't Export to STL](https://discourse.slicer.org/t/cant-export-to-stl/7632)

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**Author:** [@harsh](https://discourse.slicer.org/u/harsh)\
**Replies:** 6\
**Last updated:** [July 19, 2019, 4:11am UTC](https://discourse.slicer.org/t/cant-export-to-stl/7632 "2019-07-19T04:11:58Z")

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I have tried to export a nrrd file of a large CT scan that I have gotten, I go to segment editor and then select the segment I want via the threshold function… I try to do ‘show 3D’ and it doesn’t work. I have 64gb (upg…

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## [imported ct resolution is not good](https://discourse.slicer.org/t/imported-ct-resolution-is-not-good/7658)

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**Author:** [@kisu\_mang](https://discourse.slicer.org/u/kisu_mang)\
**Replies:** 2\
**Last updated:** [July 19, 2019, 4:10am UTC](https://discourse.slicer.org/t/imported-ct-resolution-is-not-good/7658 "2019-07-19T04:10:23Z")

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hi…i’m new to 3d slicer . i imported ct images but after imported resolution of R, Y window is not good. how i can fix ? i recorded video please help me. thanks so much!

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## [Convert mesh to engineering CAD software solid part](https://discourse.slicer.org/t/convert-mesh-to-engineering-cad-software-solid-part/7679)

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**Author:** [@raylene](https://discourse.slicer.org/u/raylene)\
**Replies:** 1\
**Last updated:** [July 19, 2019, 3:59am UTC](https://discourse.slicer.org/t/convert-mesh-to-engineering-cad-software-solid-part/7679 "2019-07-19T03:59:45Z")

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## [Extraction of 2D Image from 3D Volume](https://discourse.slicer.org/t/extraction-of-2d-image-from-3d-volume/7674)

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**Author:** [@uwo27](https://discourse.slicer.org/u/uwo27)\
**Replies:** 3\
**Last updated:** [July 19, 2019, 3:42am UTC](https://discourse.slicer.org/t/extraction-of-2d-image-from-3d-volume/7674 "2019-07-19T03:42:42Z")

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Operating system: macOS mojave Slicer version: 4.10.2 Hi, I am looking for help on how to extract a 2D image from a 3D volume.

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## [Watershed paint mode](https://discourse.slicer.org/t/watershed-paint-mode/7655)

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**Author:** [@the3dslicerdude](https://discourse.slicer.org/u/the3dslicerdude)\
**Replies:** 1\
**Last updated:** [July 18, 2019, 2:04pm UTC](https://discourse.slicer.org/t/watershed-paint-mode/7655 "2019-07-18T14:04:02Z")

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Hi everyone I noticed a feature in another software where it seems as though they use watershed filters to speed up the painting process. If that’s not already a feature, I definitely think it would be a time saver. I …

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## [Calling C++ from Python](https://discourse.slicer.org/t/calling-c-from-python/3998)

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**Author:** [@Saima](https://discourse.slicer.org/u/Saima)\
**Replies:** 19\
**Last updated:** [July 19, 2019, 12:56am UTC](https://discourse.slicer.org/t/calling-c-from-python/3998 "2019-07-19T00:56:56Z")

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## [Problem when i execute "Install Slicer Extentions "](https://discourse.slicer.org/t/problem-when-i-execute-install-slicer-extentions/7676)

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**Author:** [@Baez](https://discourse.slicer.org/u/Baez)\
**Replies:** 1\
**Last updated:** [July 18, 2019, 8:13pm UTC](https://discourse.slicer.org/t/problem-when-i-execute-install-slicer-extentions/7676 "2019-07-18T20:13:13Z")

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Dear Community When I run the extensions module, the process is finished by killing 3Dslicer. Why does it happen to me after version 4.10.2?

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## [Problem in slicer](https://discourse.slicer.org/t/problem-in-slicer/7656)

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**Author:** [@saf](https://discourse.slicer.org/u/saf)\
**Replies:** 8\
**Last updated:** [July 18, 2019, 6:31pm UTC](https://discourse.slicer.org/t/problem-in-slicer/7656 "2019-07-18T18:31:36Z")

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Why, when I open the slicer and load data suddenly, it is closed? I do not understand what is happening can you help please

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## [Help Building Slicelet with Segment Editor Functionality](https://discourse.slicer.org/t/help-building-slicelet-with-segment-editor-functionality/3734)

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**Author:** [@bsmarine](https://discourse.slicer.org/u/bsmarine)\
**Replies:** 16\
**Last updated:** [July 18, 2019, 3:38pm UTC](https://discourse.slicer.org/t/help-building-slicelet-with-segment-editor-functionality/3734 "2019-07-18T15:38:27Z")

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Hi, I’m working with a group of physicians and graduate students to develop Slicelets as part of a computer vision initiative at my hospital. I’m a long time Slicer user and fan, and am looking for guidance in construct…

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## [Problem with Elastix extension module](https://discourse.slicer.org/t/problem-with-elastix-extension-module/7588)

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**Author:** [@kuba\_grepl](https://discourse.slicer.org/u/kuba_grepl)\
**Replies:** 18\
**Last updated:** [July 18, 2019, 1:52pm UTC](https://discourse.slicer.org/t/problem-with-elastix-extension-module/7588 "2019-07-18T13:52:28Z")

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Hello, I have a problem with Elastix extension. I tried repeat simple registration case of Free Sample Data according to the instructions in You Tube video:https://www.youtube.com/watch?v=cU0pWhn0-3o But something is wr…

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## [Segment editor control over smoothing](https://discourse.slicer.org/t/segment-editor-control-over-smoothing/6907)

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**Author:** [@the3dslicerdude](https://discourse.slicer.org/u/the3dslicerdude)\
**Replies:** 3\
**Last updated:** [May 24, 2019, 4:36am UTC](https://discourse.slicer.org/t/segment-editor-control-over-smoothing/6907 "2019-05-24T04:36:59Z")

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I am unsure if this feature doesn’t already exist but I can’t seem to find it. When using the segment editor, the meshes it generates look heavily smoothed to the point where they loose a lot of detail (especially when c…

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## [Get grow from seeds segmentation method result as "3D ROI label" (segmentation-label.nrrd)](https://discourse.slicer.org/t/get-grow-from-seeds-segmentation-method-result-as-3d-roi-label-segmentation-label-nrrd/7630)

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**Author:** [@Apex](https://discourse.slicer.org/u/Apex)\
**Replies:** 3\
**Last updated:** [July 18, 2019, 11:59am UTC](https://discourse.slicer.org/t/get-grow-from-seeds-segmentation-method-result-as-3d-roi-label-segmentation-label-nrrd/7630 "2019-07-18T11:59:58Z")

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Operating system: Windows Slicer version: 4.10.2 Expected behavior: Actual behavior: Hi, We are trying to mark a ROI inside the lung by uploading a DCM file, choosing Segment Editor Module. First we select respectiv…

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## [Geometry of master and merge volumes do not match when need to edit segmentation mask](https://discourse.slicer.org/t/geometry-of-master-and-merge-volumes-do-not-match-when-need-to-edit-segmentation-mask/7649)

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**Author:** [@Vivian](https://discourse.slicer.org/u/Vivian)\
**Replies:** 1\
**Last updated:** [July 18, 2019, 4:36am UTC](https://discourse.slicer.org/t/geometry-of-master-and-merge-volumes-do-not-match-when-need-to-edit-segmentation-mask/7649 "2019-07-18T04:36:47Z")

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Operating system: mac OS Mojave Slicer version: 4.8.1 I loaded MRI dicom files and imported its generated segmentation mask ( nii.gz ) as volume. When I switch the modules to Editor, the following warning message appe…

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## [How to import transformed DICOM data](https://discourse.slicer.org/t/how-to-import-transformed-dicom-data/7625)

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**Author:** [@Sachal](https://discourse.slicer.org/u/Sachal)\
**Replies:** 3\
**Last updated:** [July 17, 2019, 2:56pm UTC](https://discourse.slicer.org/t/how-to-import-transformed-dicom-data/7625 "2019-07-17T14:56:47Z")

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Hi, I am new in using Slicer. I did AC-PC alignment of Brain DICOM, which was quite easy to do. After that I did harden transform and finally exported the DICOM. When I open this new AC-PC aligned DICOM in Slicer then i…

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## [Problems with general registration elastix](https://discourse.slicer.org/t/problems-with-general-registration-elastix/7556)

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**Author:** [@zahiraabdala](https://discourse.slicer.org/u/zahiraabdala)\
**Replies:** 5\
**Last updated:** [July 17, 2019, 2:18pm UTC](https://discourse.slicer.org/t/problems-with-general-registration-elastix/7556 "2019-07-17T14:18:13Z")

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Good afternoon, I try to use “General Registration Elastix” module extension but it tells me Volume registration is started in working directory: /Volumes/Slicer-4.10.2-macosx-amd64/Slicer.app/Contents/Extensions-28257…

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## [Move model in Slicer without VR headset](https://discourse.slicer.org/t/move-model-in-slicer-without-vr-headset/7624)

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**Author:** [@Christina](https://discourse.slicer.org/u/Christina)\
**Replies:** 1\
**Last updated:** [July 17, 2019, 1:24pm UTC](https://discourse.slicer.org/t/move-model-in-slicer-without-vr-headset/7624 "2019-07-17T13:24:22Z")

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Hello, I am putting in a request to be able to move a model around in Slicer, without VR headset and controllers. Right now, we can only move a surgical tool (model) around in VR mode, but we would like to control this …

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## [Exporting STL and Fiducial Points together](https://discourse.slicer.org/t/exporting-stl-and-fiducial-points-together/7620)

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**Author:** [@Nicholas.jacobson](https://discourse.slicer.org/u/Nicholas.jacobson)\
**Replies:** 1\
**Last updated:** [July 17, 2019, 12:48pm UTC](https://discourse.slicer.org/t/exporting-stl-and-fiducial-points-together/7620 "2019-07-17T12:48:43Z")

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Hi all, As a 3d print designer, I’m always exporting STL’s. Now, I’m looking to export fiducial points but having trouble. I’ve been placing fiducial points in the volume rendering and then copying their x,y,z coordinat…

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## [Trying to make a STL from a NRRD](https://discourse.slicer.org/t/trying-to-make-a-stl-from-a-nrrd/7615)

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**Author:** [@harsh](https://discourse.slicer.org/u/harsh)\
**Replies:** 4\
**Last updated:** [July 17, 2019, 8:54am UTC](https://discourse.slicer.org/t/trying-to-make-a-stl-from-a-nrrd/7615 "2019-07-17T08:54:19Z")

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I Imported a nrrd file and then used Segment Editor module to create a segment with the appropriate threseholds that I was looking for, upon this I recieve the error Traceback (most recent call last): File “C:\\Program F…

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## [Track head position](https://discourse.slicer.org/t/track-head-position/7453)

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**Author:** [@Zhao\_Su](https://discourse.slicer.org/u/Zhao_Su)\
**Replies:** 3\
**Last updated:** [July 16, 2019, 9:26pm UTC](https://discourse.slicer.org/t/track-head-position/7453 "2019-07-16T21:26:26Z")

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I want to add a NDI tool on a tracked stuff , but when I move it , it is not like reality in the computer. How can I do calibration or registration?

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## [Radiotherapy Contours compare](https://discourse.slicer.org/t/radiotherapy-contours-compare/7613)

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**Author:** [@zeinebnaimi](https://discourse.slicer.org/u/zeinebnaimi)\
**Replies:** 2\
**Last updated:** [July 16, 2019, 5:00pm UTC](https://discourse.slicer.org/t/radiotherapy-contours-compare/7613 "2019-07-16T17:00:54Z")

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Hi everyone, I am radiotherapy resident doctor. In order to study the feasability of coronary arteries’ contouring using a reference atlas, we aim to use 3D slicer RT to compare contours. Unfortunately, we are having som…

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## [Creating custom ROI](https://discourse.slicer.org/t/creating-custom-roi/7442)

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**Author:** [@Jainey](https://discourse.slicer.org/u/Jainey)\
**Replies:** 6\
**Last updated:** [July 16, 2019, 4:49pm UTC](https://discourse.slicer.org/t/creating-custom-roi/7442 "2019-07-16T16:49:25Z")

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Hi All Is there a way that I create a custom shaped ROI, instead of the box. A spherical one. Thanks Tom

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## [Saving Segmentation as NRRD, later deletes half of the segmentation?!](https://discourse.slicer.org/t/saving-segmentation-as-nrrd-later-deletes-half-of-the-segmentation/7598)

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**Author:** [@NoobForSlicer](https://discourse.slicer.org/u/NoobForSlicer)\
**Replies:** 8\
**Last updated:** [July 16, 2019, 4:28pm UTC](https://discourse.slicer.org/t/saving-segmentation-as-nrrd-later-deletes-half-of-the-segmentation/7598 "2019-07-16T16:28:06Z")

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So I have been cropping some bigger volume down to smaller volumes so that weaker PC on my job can handle it. Poor thing only has 2gb ram and slicer takes up to 3 to even 4 sometimes during cropping or some task. Plus it…

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## [Installed extension not visible in the 3d slicer module](https://discourse.slicer.org/t/installed-extension-not-visible-in-the-3d-slicer-module/7607)

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**Author:** [@youstina\_melek](https://discourse.slicer.org/u/youstina_melek)\
**Replies:** 0\
**Last updated:** [July 16, 2019, 11:54am UTC](https://discourse.slicer.org/t/installed-extension-not-visible-in-the-3d-slicer-module/7607 "2019-07-16T11:54:00Z")

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Hello, I have installed LesionSimulator extension successfully and it is visible in the extension manager, however, I can not access/find it in the modules. I am currently using version 4.11. Your help is really appreci…

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## [Interpolating contours from a RTSTRUCT file using batch processing](https://discourse.slicer.org/t/interpolating-contours-from-a-rtstruct-file-using-batch-processing/7587)

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**Author:** [@Shekhar](https://discourse.slicer.org/u/Shekhar)\
**Replies:** 3\
**Last updated:** [July 15, 2019, 3:31pm UTC](https://discourse.slicer.org/t/interpolating-contours-from-a-rtstruct-file-using-batch-processing/7587 "2019-07-15T15:31:27Z")

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Hello, I have an RTSTRUCT file (.dcm) and its reference files (ultrasound images in dicom format). RTSTRUCT file contains contour data for ROI at some slice locations, I would like to interpolate the contour data to all…

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## [Odd DICOM import](https://discourse.slicer.org/t/odd-dicom-import/7576)

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**Author:** [@Amine](https://discourse.slicer.org/u/Amine)\
**Replies:** 9\
**Last updated:** [July 15, 2019, 2:11pm UTC](https://discourse.slicer.org/t/odd-dicom-import/7576 "2019-07-15T14:11:33Z")

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slicer versions: 4.10.1 ; 4.11 windows 10 this particular dicom fails to import and shows up as two copies of the content under the same volume with the original resolution (images are shrunk up to fit in the original …

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