# Support **URL:** https://discourse.slicer.org/c/support/11.md?page=301 [Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md) **Page:** 302 --- ## [Is LeapMotion Module updated?](https://discourse.slicer.org/t/is-leapmotion-module-updated/13073)

**Author:** [@apparrilla](https://discourse.slicer.org/u/apparrilla)\ **Replies:** 18\ **Last updated:** [January 23, 2021, 3:10pm UTC](https://discourse.slicer.org/t/is-leapmotion-module-updated/13073 "2021-01-23T15:10:19Z")

Hi people, Slicer version: Slicer 4.11.0-2020-07-04 Win I´m trying to control scene view with LeapMotion device and I have some trouble. I follow installation steps from GitHub proyect (download drivers and put them i… --- ## [Read Dicom label map and export .nrrd label map](https://discourse.slicer.org/t/read-dicom-label-map-and-export-nrrd-label-map/15627)

**Author:** [@diehumblex](https://discourse.slicer.org/u/diehumblex)\ **Replies:** 3\ **Last updated:** [January 23, 2021, 9:53pm UTC](https://discourse.slicer.org/t/read-dicom-label-map-and-export-nrrd-label-map/15627 "2021-01-23T21:53:46Z")

Hi! i am trying to convert dicom label map into nrrd. on save only option i get is mrd mrml and seg.vtm Any help would be appreciated. Thank you. About Dataset: I am using HN1 dataset for this. Each patient contains 3 … --- ## [Setting visibility to off in Volume Rendering does not unload the volume from texture memory](https://discourse.slicer.org/t/setting-visibility-to-off-in-volume-rendering-does-not-unload-the-volume-from-texture-memory/15127)

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\ **Replies:** 13\ **Last updated:** [January 22, 2021, 11:36pm UTC](https://discourse.slicer.org/t/setting-visibility-to-off-in-volume-rendering-does-not-unload-the-volume-from-texture-memory/15127 "2021-01-22T23:36:12Z")

As it is, once the volume is loaded onto the GPU texture memory, turning off its visibility does not unload it. Any subsequent volumes selected to render in the same session add to this memory usage (I am tracking throug… --- ## [Can I run conda in CLI?](https://discourse.slicer.org/t/can-i-run-conda-in-cli/4134)

**Author:** [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\ **Replies:** 3\ **Last updated:** [January 22, 2021, 11:34pm UTC](https://discourse.slicer.org/t/can-i-run-conda-in-cli/4134 "2021-01-22T23:34:35Z")

How can I run “conda” in python interactor? I want to pip install some code. --- ## [Views synchronization after registration](https://discourse.slicer.org/t/views-synchronization-after-registration/15613)

**Author:** [@LaurennLam](https://discourse.slicer.org/u/LaurennLam)\ **Replies:** 6\ **Last updated:** [January 22, 2021, 2:42pm UTC](https://discourse.slicer.org/t/views-synchronization-after-registration/15613 "2021-01-22T14:42:35Z")

Hi all, I’d like to know if it’s possible to have two slice’s synchronize views in Slicer ? Explanations: I have two volumes. One is registered to the other. The main idea is to display those two volumes into separate… --- ## [Extension builds failing for Windows amd mac, but succeeding for linux](https://discourse.slicer.org/t/extension-builds-failing-for-windows-amd-mac-but-succeeding-for-linux/15590)

**Author:** [@Alex\_Vergara](https://discourse.slicer.org/u/Alex_Vergara)\ **Replies:** 4\ **Last updated:** [January 22, 2021, 9:37am UTC](https://discourse.slicer.org/t/extension-builds-failing-for-windows-amd-mac-but-succeeding-for-linux/15590 "2021-01-22T09:37:28Z")

In Dash board I can see my entension is building successfully in Linux (my main OS). However I have detected that it is failing for Windows and mac since december 25, 2020. I have not made any significant changes to it a… --- ## [Access the 3x3 diffusion tensor matrix of dti images](https://discourse.slicer.org/t/access-the-3x3-diffusion-tensor-matrix-of-dti-images/8185)

**Author:** [@mshah](https://discourse.slicer.org/u/mshah)\ **Replies:** 15\ **Last updated:** [January 21, 2021, 11:18pm UTC](https://discourse.slicer.org/t/access-the-3x3-diffusion-tensor-matrix-of-dti-images/8185 "2021-01-21T23:18:02Z")

Hi all, I have a set of patients’ dti images. How do I extract the 3x3 diffusion tensor matrices per each voxel? Additionally how do I convert the DTI image to nrrd format, can I still use the DWIconvert module even tho… --- ## [Ubuntu 20.10 cannot run previously working Slicer version](https://discourse.slicer.org/t/ubuntu-20-10-cannot-run-previously-working-slicer-version/14224)

**Author:** [@Greydon\_Gilmore](https://discourse.slicer.org/u/Greydon_Gilmore)\ **Replies:** 15\ **Last updated:** [January 21, 2021, 4:02pm UTC](https://discourse.slicer.org/t/ubuntu-20-10-cannot-run-previously-working-slicer-version/14224 "2021-01-21T16:02:28Z")

Hello, I have been using 3D Slicer v4.10.2 on Ubuntu 20.04 without issue. After upgrading to Ubuntu 20.10, 3D Slicer fails at the splash screen. Are there critical libraries that might be missing between Ubuntu version… --- ## [ALPACA module alignment help - shapes too different?](https://discourse.slicer.org/t/alpaca-module-alignment-help-shapes-too-different/15455)

**Author:** [@bobkallal](https://discourse.slicer.org/u/bobkallal)\ **Replies:** 23\ **Last updated:** [January 20, 2021, 10:53pm UTC](https://discourse.slicer.org/t/alpaca-module-alignment-help-shapes-too-different/15455 "2021-01-20T22:53:44Z")

Hi, I’m working some some sclerites that lack obvious landmarks that lend themselves to conventional landmarking and want to attempt to use the ALPACA module. I have surface meshes (.ply), with segmentations performed i… --- ## [X ray Image enhancement extension in slicer?](https://discourse.slicer.org/t/x-ray-image-enhancement-extension-in-slicer/15469)

**Author:** [@drvarunagarwal](https://discourse.slicer.org/u/drvarunagarwal)\ **Replies:** 5\ **Last updated:** [January 20, 2021, 4:38pm UTC](https://discourse.slicer.org/t/x-ray-image-enhancement-extension-in-slicer/15469 "2021-01-20T16:38:04Z")

Hi, Is there an image enhancement extension for slicer that can take a poor quality x ray and enhance the structures (esp. bone) automatically and then maybe some contrast brightness sliders to manually fine tune it? C… --- ## [CT scan problem, as shown in the image](https://discourse.slicer.org/t/ct-scan-problem-as-shown-in-the-image/15598)

**Author:** [@Moeka\_Chan](https://discourse.slicer.org/u/Moeka_Chan)\ **Replies:** 1\ **Last updated:** [January 19, 2021, 10:13pm UTC](https://discourse.slicer.org/t/ct-scan-problem-as-shown-in-the-image/15598 "2021-01-19T22:13:44Z")

Hello, I install the latest Slicer. I loaded the CT scan images. They look somehow as follows… This problem happens after I used the new Slicer… How to edit the data in Slicer and make the image show correctly. --- ## [How to install SlicerDRRGenerator extension in to Slicer](https://discourse.slicer.org/t/how-to-install-slicerdrrgenerator-extension-in-to-slicer/15597)

**Author:** [@Moeka\_Chan](https://discourse.slicer.org/u/Moeka_Chan)\ **Replies:** 0\ **Last updated:** [January 19, 2021, 8:15pm UTC](https://discourse.slicer.org/t/how-to-install-slicerdrrgenerator-extension-in-to-slicer/15597 "2021-01-19T20:15:08Z")

Hello, I want to create DRR image from CT scan. I found SlicerDRRGenerator, but I don’t know how to install it to Slicer… I used the Extension Wizard. The extension is not fully installed. The GUI differs from the one… --- ## [Scale in Volume Rendering](https://discourse.slicer.org/t/scale-in-volume-rendering/15596)

**Author:** [@Keegan\_Selig](https://discourse.slicer.org/u/Keegan_Selig)\ **Replies:** 1\ **Last updated:** [January 19, 2021, 7:51pm UTC](https://discourse.slicer.org/t/scale-in-volume-rendering/15596 "2021-01-19T19:51:39Z")

I am wondering if there is a way to add a scale bar to the volume rendering or surface rendering window so I can see how large something is or so I can do secondary measurements with other software outside of 3DSlicer. T… --- ## [Make stl into solid and smooth surface](https://discourse.slicer.org/t/make-stl-into-solid-and-smooth-surface/15515)

**Author:** [@Valentina\_Mejia\_Gall](https://discourse.slicer.org/u/Valentina_Mejia_Gall)\ **Replies:** 4\ **Last updated:** [January 19, 2021, 2:29am UTC](https://discourse.slicer.org/t/make-stl-into-solid-and-smooth-surface/15515 "2021-01-19T02:29:24Z")

I need to do a finite element analysis, for this I export the STL and I have a surface with several faces or triangles, I need to convert it to solid and the surface is as “smooth” as possible. is there any way to do it … --- ## [Several series into one](https://discourse.slicer.org/t/several-series-into-one/15586)

**Author:** [@Natalia\_Lach](https://discourse.slicer.org/u/Natalia_Lach)\ **Replies:** 1\ **Last updated:** [January 19, 2021, 12:00am UTC](https://discourse.slicer.org/t/several-series-into-one/15586 "2021-01-19T00:00:55Z")

Is it possible to combine several series of images into one? When I choose one series the effect is unsatisfactory: --- ## [Save stl segmentation to image format](https://discourse.slicer.org/t/save-stl-segmentation-to-image-format/15554)

**Author:** [@Moran\_Artzi](https://discourse.slicer.org/u/Moran_Artzi)\ **Replies:** 12\ **Last updated:** [January 18, 2021, 5:28pm UTC](https://discourse.slicer.org/t/save-stl-segmentation-to-image-format/15554 "2021-01-18T17:28:39Z")

HI I have stl file and CT file (on which the segmentation was perform) How can I convert and save my stl file into dicom / nifti or other image format at the same dimension as the orig CT image? Thanks a lot Moran … --- ## [Skull surface segmentation using suture lines](https://discourse.slicer.org/t/skull-surface-segmentation-using-suture-lines/15577)

**Author:** [@mucahit\_calisan](https://discourse.slicer.org/u/mucahit_calisan)\ **Replies:** 1\ **Last updated:** [January 18, 2021, 5:22am UTC](https://discourse.slicer.org/t/skull-surface-segmentation-using-suture-lines/15577 "2021-01-18T05:22:33Z")

Hello there, I am at the beginning stage of 3D slicer. I’m trying to make a video of Andras Lasso named “Bone surface segmentation using suture lines”. Can you help me? I wonder if you can share the full version of the … --- ## [How to hollow a Volume Render using a Segment instead of a Surface Cut?](https://discourse.slicer.org/t/how-to-hollow-a-volume-render-using-a-segment-instead-of-a-surface-cut/15462)

**Author:** [@Biomodelos\_3D](https://discourse.slicer.org/u/Biomodelos_3D)\ **Replies:** 7\ **Last updated:** [January 16, 2021, 5:16pm UTC](https://discourse.slicer.org/t/how-to-hollow-a-volume-render-using-a-segment-instead-of-a-surface-cut/15462 "2021-01-16T17:16:08Z")

Operating system:W10 Slicer version: 4.11.20 Expected behavior: Hollow a Volume Render using a Segment Actual behavior: ? Can a Volume Render be Masked by a 3D Segment instead of a Surface Cut? I assume it can be do… --- ## [Upgraded to macOS Big Sur and can no longer use Segment Editor on saved scenes (mrml)](https://discourse.slicer.org/t/upgraded-to-macos-big-sur-and-can-no-longer-use-segment-editor-on-saved-scenes-mrml/15523)

**Author:** [@Wesley\_Thornton](https://discourse.slicer.org/u/Wesley_Thornton)\ **Replies:** 9\ **Last updated:** [January 16, 2021, 3:39pm UTC](https://discourse.slicer.org/t/upgraded-to-macos-big-sur-and-can-no-longer-use-segment-editor-on-saved-scenes-mrml/15523 "2021-01-16T15:39:12Z")

Operating system: macOS Big Sur Slicer version: 4.13.0-2021 Expected behavior: Actual behavior: When I upload a saved mrml I either get kicked out of Slicer and an error message pops up, or the scene loads with just c… --- ## [How to remove the bone in volume rendering](https://discourse.slicer.org/t/how-to-remove-the-bone-in-volume-rendering/15548)

**Author:** [@chendong9416](https://discourse.slicer.org/u/chendong9416)\ **Replies:** 7\ **Last updated:** [January 16, 2021, 3:35pm UTC](https://discourse.slicer.org/t/how-to-remove-the-bone-in-volume-rendering/15548 "2021-01-16T15:35:17Z")

how to remove the bone in volume rendering, and adjust the opacity of the aorta to make it semitransparent? thanks! --- ## [3D reconstruction using all the three orientation of MRI volumes](https://discourse.slicer.org/t/3d-reconstruction-using-all-the-three-orientation-of-mri-volumes/13363)

**Author:** [@DivyaB\_9569](https://discourse.slicer.org/u/DivyaB_9569)\ **Replies:** 1\ **Last updated:** [January 16, 2021, 3:25pm UTC](https://discourse.slicer.org/t/3d-reconstruction-using-all-the-three-orientation-of-mri-volumes/13363 "2021-01-16T15:25:44Z")

Dear all, looking for 3D reconstruction using all the three orientations MRI volumes(Axial, coronal, and sagittal MRI volumes ) acquired. --- ## [Perpendicular cross sectional area along centerline ](https://discourse.slicer.org/t/perpendicular-cross-sectional-area-along-centerline/15558)

**Author:** [@airtech2](https://discourse.slicer.org/u/airtech2)\ **Replies:** 0\ **Last updated:** [January 16, 2021, 3:20pm UTC](https://discourse.slicer.org/t/perpendicular-cross-sectional-area-along-centerline/15558 "2021-01-16T15:20:33Z")

Operating system: windows Slicer version: 4.11 Expected behavior: Actual behavior: I had done segmentation of vessel and extract centerline with VMTK tool kit With centerline metrics, i was able to get diameter of v… --- ## [Perpendicular cross sectional area along centerline ](https://discourse.slicer.org/t/perpendicular-cross-sectional-area-along-centerline/15557)

I need a perpendicular cross sectional area along centerline in vessel segmentation model. I can extract centerline using VMTK extension and get diameter along centerline using centerline metrics extension. However, I … --- ## [Problem with shadows in the cutting plane](https://discourse.slicer.org/t/problem-with-shadows-in-the-cutting-plane/15551)

**Author:** [@Andreas](https://discourse.slicer.org/u/Andreas)\ **Replies:** 1\ **Last updated:** [January 16, 2021, 6:59am UTC](https://discourse.slicer.org/t/problem-with-shadows-in-the-cutting-plane/15551 "2021-01-16T06:59:54Z")

Hello everyone, I have a problem with the representation of the cutting plane in a vessel section, it becomes very dark (shown in shadow) The cutting plane at the openings of the vessel are shown very clearly I al… --- ## [Nightly build does not run](https://discourse.slicer.org/t/nightly-build-does-not-run/6774)

**Author:** [@sheharyar\_anwar](https://discourse.slicer.org/u/sheharyar_anwar)\ **Replies:** 4\ **Last updated:** [January 16, 2021, 5:05am UTC](https://discourse.slicer.org/t/nightly-build-does-not-run/6774 "2021-01-16T05:05:04Z")

Operating system: Windows 10 Slicer version: 4.10 Expected behavior: Run successfully after build Actual behavior: Closes with error that certain .dll files are missing just after appearance of logo. Specifically ment… --- ## [Change focus of camera in 3D view](https://discourse.slicer.org/t/change-focus-of-camera-in-3d-view/15545)

**Author:** [@LuckyLuke](https://discourse.slicer.org/u/LuckyLuke)\ **Replies:** 3\ **Last updated:** [January 15, 2021, 11:28pm UTC](https://discourse.slicer.org/t/change-focus-of-camera-in-3d-view/15545 "2021-01-15T23:28:49Z")

Hello everyone! I have one silly question: how to change focus of the camera in 3D. from what I understood, camera is always looking at exactly \>\>1 position. I can indeed pan the camera back and forth but when I rotat… --- ## [Problem loading segmentation from file (trouble parsing space directions info)](https://discourse.slicer.org/t/problem-loading-segmentation-from-file-trouble-parsing-space-directions-info/3444)

**Author:** [@Laura\_CM](https://discourse.slicer.org/u/Laura_CM)\ **Replies:** 4\ **Last updated:** [January 15, 2021, 2:13pm UTC](https://discourse.slicer.org/t/problem-loading-segmentation-from-file-trouble-parsing-space-directions-info/3444 "2021-01-15T14:13:09Z")

Hi everyone. I am a new user and I apologize for my English, I am trying to do my best to explain. When I save my work, all files that get created after segmentation, export it, etc. Then I can’t open them and appear t… --- ## [Film Dosimetry missing table](https://discourse.slicer.org/t/film-dosimetry-missing-table/15479)

**Author:** [@Michael\_Costello](https://discourse.slicer.org/u/Michael_Costello)\ **Replies:** 4\ **Last updated:** [January 15, 2021, 1:04pm UTC](https://discourse.slicer.org/t/film-dosimetry-missing-table/15479 "2021-01-15T13:04:24Z")

I am attempting to use the SlicerRT and Film Dosimetry extensions to perform gamma analysis. However, I am unable to input any values to the plot. I have selected the films to be used for calibration and input the dose t… --- ## [How to get the master volume of a segmentation with Python](https://discourse.slicer.org/t/how-to-get-the-master-volume-of-a-segmentation-with-python/15520)

**Author:** [@samuelholly](https://discourse.slicer.org/u/samuelholly)\ **Replies:** 2\ **Last updated:** [January 15, 2021, 10:46am UTC](https://discourse.slicer.org/t/how-to-get-the-master-volume-of-a-segmentation-with-python/15520 "2021-01-15T10:46:56Z")

Dear Slicer communnity, sorry if this was already asked before. I would like to ask how can I get the master volume node from of a segmentation in the Python interactor. Thank you very much in advance. Samuel --- ## [How to display the size and center of gravity](https://discourse.slicer.org/t/how-to-display-the-size-and-center-of-gravity/15535)

**Author:** [@slicer365](https://discourse.slicer.org/u/slicer365)\ **Replies:** 1\ **Last updated:** [January 15, 2021, 4:10am UTC](https://discourse.slicer.org/t/how-to-display-the-size-and-center-of-gravity/15535 "2021-01-15T04:10:18Z")

This is shown through Magic, how to display the size and center of gravity of the model through Slicer [Previous page](https://discourse.slicer.org/c/support/11.md?page=300) [Next page](https://discourse.slicer.org/c/support/11.md?page=302)