# Support

**URL:** https://discourse.slicer.org/c/support/11.md?page=380

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

**Page:** 381

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## [Build Slicer Error ](https://discourse.slicer.org/t/build-slicer-error/7470)

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**Author:** [@Mohsen\_Taheri](https://discourse.slicer.org/u/Mohsen_Taheri)\
**Replies:** 4\
**Last updated:** [July 9, 2019, 12:15am UTC](https://discourse.slicer.org/t/build-slicer-error/7470 "2019-07-09T00:15:27Z")

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Hi, I follow the buillding instruction step by step but when I want to build slicer I get this error (Severity Code Description Project File Line Suppression State Error EndUpdateResourceC /D/S4D/Slicer-build/Slicer.ex…

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## [Calculating the DVH for average of n RT Dose](https://discourse.slicer.org/t/calculating-the-dvh-for-average-of-n-rt-dose/7456)

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**Author:** [@aseman](https://discourse.slicer.org/u/aseman)\
**Replies:** 1\
**Last updated:** [July 8, 2019, 2:33pm UTC](https://discourse.slicer.org/t/calculating-the-dvh-for-average-of-n-rt-dose/7456 "2019-07-08T14:33:38Z")

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Slicer version: 4.10.1 Hi 3D Slicer experts and all I have some RT Dose (for n patients) and I want to calculate DVH for average of these RT Doses. is it possible that I calculate a mean DVH instead of n DVH with 3D Sl…

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## [Could I extract radiomics features from 2-D Ultrasound Image using 3DSlicer?](https://discourse.slicer.org/t/could-i-extract-radiomics-features-from-2-d-ultrasound-image-using-3dslicer/7437)

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**Author:** [@Saikit](https://discourse.slicer.org/u/Saikit)\
**Replies:** 2\
**Last updated:** [July 8, 2019, 2:29pm UTC](https://discourse.slicer.org/t/could-i-extract-radiomics-features-from-2-d-ultrasound-image-using-3dslicer/7437 "2019-07-08T14:29:10Z")

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Dear Professionals, I was wondering whether I could use 3DSlicer to extract radiomics features from 2-D Ultrasound images? Very best regards, Saikit

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## [Send single Fiducial- OpenIGTLink](https://discourse.slicer.org/t/send-single-fiducial-openigtlink/7397)

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**Author:** [@ChiaraTe](https://discourse.slicer.org/u/ChiaraTe)\
**Replies:** 5\
**Last updated:** [July 8, 2019, 1:23pm UTC](https://discourse.slicer.org/t/send-single-fiducial-openigtlink/7397 "2019-07-08T13:23:56Z")

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Hi, I am writing an User Interface with Python Qt and SlicerDesigner and I am using OpenIGTLink for communication with external device. I send the whole Fiducial List with : connectorNode.RegisterOutgoingMRMLNode(Fidu…

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## [Slicer with CUDA integration](https://discourse.slicer.org/t/slicer-with-cuda-integration/7436)

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**Author:** [@fpsiddiqui91](https://discourse.slicer.org/u/fpsiddiqui91)\
**Replies:** 2\
**Last updated:** [July 8, 2019, 7:54am UTC](https://discourse.slicer.org/t/slicer-with-cuda-integration/7436 "2019-07-08T07:54:39Z")

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Operating system: CentOS 7 Slicer version: 4.10 Hello Slicer community, I have recently started working on MR imaging. My work actually involves the development of the tool for improving tractography visualization. Be…

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## [How to duplicate a segment easily for other master volume?](https://discourse.slicer.org/t/how-to-duplicate-a-segment-easily-for-other-master-volume/7425)

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**Author:** [@TingtingYu](https://discourse.slicer.org/u/TingtingYu)\
**Replies:** 2\
**Last updated:** [July 8, 2019, 2:19am UTC](https://discourse.slicer.org/t/how-to-duplicate-a-segment-easily-for-other-master-volume/7425 "2019-07-08T02:19:52Z")

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Hi~, I first created a segment using Segment Editor when CT is the master volume. Then I want to create a same segment when I choose MRI image as the master volume. Is there a easy way to do that? (CT volume and MRI vol…

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## [fMRI module? Remember FMRIEngine?](https://discourse.slicer.org/t/fmri-module-remember-fmriengine/7417)

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**Author:** [@cutkiller](https://discourse.slicer.org/u/cutkiller)\
**Replies:** 1\
**Last updated:** [July 7, 2019, 4:06pm UTC](https://discourse.slicer.org/t/fmri-module-remember-fmriengine/7417 "2019-07-07T16:06:59Z")

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A few years back https://www.slicer.org/wiki/Slicer:Slicer2.6\_Release\_Notes#FMRIEngine FMRIEngine was a module in Slicer. Any idea what happened to it? Was it taken out? Any way of analyzing fMRI data in Slicer nowaday…

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## [Create a cube with the certain vertices](https://discourse.slicer.org/t/create-a-cube-with-the-certain-vertices/7362)

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**Author:** [@shahrokh](https://discourse.slicer.org/u/shahrokh)\
**Replies:** 7\
**Last updated:** [July 7, 2019, 12:01pm UTC](https://discourse.slicer.org/t/create-a-cube-with-the-certain-vertices/7362 "2019-07-07T12:01:33Z")

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Hi Dears 3DSlicer developers I want to create a cube with the certain vertices. For example, I have 8 points (vertices) with the following spatial coordinates in RAS. Vertex R A S superiorUpRight -731.523242270…

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## [Problem having volume rendering of 3D ultrasound image](https://discourse.slicer.org/t/problem-having-volume-rendering-of-3d-ultrasound-image/4238)

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**Author:** [@solstice](https://discourse.slicer.org/u/solstice)\
**Replies:** 5\
**Last updated:** [July 6, 2019, 7:44pm UTC](https://discourse.slicer.org/t/problem-having-volume-rendering-of-3d-ultrasound-image/4238 "2019-07-06T19:44:11Z")

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hello i just downloaded Slicer and new to this. I have a 3d printer at home so i want to try printing fetus files. so i found this video on youtube. View your baby ultrasound and create 3D printable model using free sof…

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## [Aligning segmentation volume with image volume in code using nrrd headers](https://discourse.slicer.org/t/aligning-segmentation-volume-with-image-volume-in-code-using-nrrd-headers/1514)

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**Author:** [@dcantor](https://discourse.slicer.org/u/dcantor)\
**Replies:** 4\
**Last updated:** [November 24, 2017, 3:03pm UTC](https://discourse.slicer.org/t/aligning-segmentation-volume-with-image-volume-in-code-using-nrrd-headers/1514 "2017-11-24T15:03:35Z")

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Hello, I am working on prostate segmentation in Slicer. After finishing the segmentation and saving the Scene, I took a look at the image volume (V) and the segmentation volume (S) nrrd files in python, the two volumes …

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## [Extract angular displacement from "Rotate to Volume Plane"](https://discourse.slicer.org/t/extract-angular-displacement-from-rotate-to-volume-plane/7435)

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**Author:** [@Manuel](https://discourse.slicer.org/u/Manuel)\
**Replies:** 2\
**Last updated:** [July 5, 2019, 5:37pm UTC](https://discourse.slicer.org/t/extract-angular-displacement-from-rotate-to-volume-plane/7435 "2019-07-05T17:37:11Z")

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Operating system: Windows 10 Slicer version: 4.8.0 Hello everybody, is there any possibility to extract the angular displacement (axial , sagittal, coronal or x, y, z) between the default aligned slicer viewers of the…

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## [Quality of registration](https://discourse.slicer.org/t/quality-of-registration/7421)

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**Author:** [@Sibi\_Thirunavukarasu](https://discourse.slicer.org/u/Sibi_Thirunavukarasu)\
**Replies:** 1\
**Last updated:** [July 5, 2019, 4:48pm UTC](https://discourse.slicer.org/t/quality-of-registration/7421 "2019-07-05T16:48:30Z")

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Hi, I am registering CT perfusion maps with the MRI DWI sequence using elastix module. Is there a way to check the quality of the registration other than visual assessment? Thanks in advance

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## [How to install a extension from file?](https://discourse.slicer.org/t/how-to-install-a-extension-from-file/7439)

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**Author:** [@zhaobingshuai](https://discourse.slicer.org/u/zhaobingshuai)\
**Replies:** 1\
**Last updated:** [July 5, 2019, 4:35pm UTC](https://discourse.slicer.org/t/how-to-install-a-extension-from-file/7439 "2019-07-05T16:35:32Z")

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hi, i want install screenCapture extension on my windows computer,but my slicer’s extensions manager can’t show anything(Perhaps the reason for the network)，so, i want install this extension from file, but I don’t know w…

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## [Creating a module with existing python code](https://discourse.slicer.org/t/creating-a-module-with-existing-python-code/7373)

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**Author:** [@Jesse](https://discourse.slicer.org/u/Jesse)\
**Replies:** 15\
**Last updated:** [July 4, 2019, 7:47pm UTC](https://discourse.slicer.org/t/creating-a-module-with-existing-python-code/7373 "2019-07-04T19:47:40Z")

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Hi all I’m new to 3D slicer and I’m looking for ways to create a plug-in (extension) in this software which can utilize already existing python codes. I can’t really find anything helpful online about this. Anybody here…

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## [CT Perfusion coregistration with DWI](https://discourse.slicer.org/t/ct-perfusion-coregistration-with-dwi/7312)

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**Author:** [@Sibi\_Thirunavukarasu](https://discourse.slicer.org/u/Sibi_Thirunavukarasu)\
**Replies:** 4\
**Last updated:** [July 4, 2019, 6:03pm UTC](https://discourse.slicer.org/t/ct-perfusion-coregistration-with-dwi/7312 "2019-07-04T18:03:18Z")

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Hi I am trying to prepare ground truth for a CT Perfusion based stroke study. First I am trying to coregister CTP source images with the DWI and then I have to perform segmentation of dwi images. I am a physician by tra…

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## [Scalar heatmap on vtk model](https://discourse.slicer.org/t/scalar-heatmap-on-vtk-model/7416)

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**Author:** [@jlaframboise](https://discourse.slicer.org/u/jlaframboise)\
**Replies:** 0\
**Last updated:** [July 4, 2019, 5:05pm UTC](https://discourse.slicer.org/t/scalar-heatmap-on-vtk-model/7416 "2019-07-04T17:05:46Z")

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I am looking to color a vtk curve model with the curvature at each point on the curve. I have working code that does this but when I save all the elements in the scene including the curve.vtk model, and reopen it in slic…

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## [Changing label images](https://discourse.slicer.org/t/changing-label-images/7410)

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**Author:** [@pouyahoseini](https://discourse.slicer.org/u/pouyahoseini)\
**Replies:** 1\
**Last updated:** [July 4, 2019, 5:30pm UTC](https://discourse.slicer.org/t/changing-label-images/7410 "2019-07-04T17:30:58Z")

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Operating system: Slicer version: Expected behavior: Hi.I have some images with mistake label.for example sagital image that have coronal label.how i can the change this labels to correct form?

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## [Draw specific lines and measure ange between them](https://discourse.slicer.org/t/draw-specific-lines-and-measure-ange-between-them/7411)

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**Author:** [@Bence\_Horvath](https://discourse.slicer.org/u/Bence_Horvath)\
**Replies:** 2\
**Last updated:** [July 4, 2019, 1:30pm UTC](https://discourse.slicer.org/t/draw-specific-lines-and-measure-ange-between-them/7411 "2019-07-04T13:30:31Z")

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Hi, I would like to know, is it possible, that I draw line or circle with specific lenght/radius (instead of I move the mosue and change the lenght), like type xx mm and I get a xx mm lenght line or circle. And how can…

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## [Only black slices upon importing nrrd from 3DSlicer](https://discourse.slicer.org/t/only-black-slices-upon-importing-nrrd-from-3dslicer/7400)

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**Author:** [@6ramr](https://discourse.slicer.org/u/6ramr)\
**Replies:** 2\
**Last updated:** [July 3, 2019, 5:18pm UTC](https://discourse.slicer.org/t/only-black-slices-upon-importing-nrrd-from-3dslicer/7400 "2019-07-03T17:18:03Z")

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Hello there, For a project I need to disassamble a nrrd-stack to separate tifs. I tried to accomplish this using Fiji (ImageJ2). Upon the import of said nrrd showing the segmenation-mask of tissue generated with 3DSlice…

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## [Adding two volumes](https://discourse.slicer.org/t/adding-two-volumes/7339)

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**Author:** [@anitakh1](https://discourse.slicer.org/u/anitakh1)\
**Replies:** 6\
**Last updated:** [July 3, 2019, 4:59pm UTC](https://discourse.slicer.org/t/adding-two-volumes/7339 "2019-07-03T16:59:23Z")

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i had segmented a volume from top and bottom (and hence the slices are less in this) and did some processing in segmented volume. now i want to add the original volume and this segmented volume. how can i do this? pl hel…

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## [Zoom in or out via python interactor version 4.8.0 on MAC](https://discourse.slicer.org/t/zoom-in-or-out-via-python-interactor-version-4-8-0-on-mac/2254)

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**Author:** [@Ahmed\_Soufane](https://discourse.slicer.org/u/Ahmed_Soufane)\
**Replies:** 16\
**Last updated:** [July 2, 2019, 9:54pm UTC](https://discourse.slicer.org/t/zoom-in-or-out-via-python-interactor-version-4-8-0-on-mac/2254 "2019-07-02T21:54:44Z")

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Hi, I was wondering how can I control the zooming of the 3D view via python interactor on slicer ? like it can be seen on the attached pictures? thank you

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## [crop volume problem](https://discourse.slicer.org/t/crop-volume-problem/7316)

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**Author:** [@mertdurdagi](https://discourse.slicer.org/u/mertdurdagi)\
**Replies:** 2\
**Last updated:** [July 2, 2019, 10:07am UTC](https://discourse.slicer.org/t/crop-volume-problem/7316 "2019-07-02T10:07:15Z")

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Hello there, When I am done with volume rendering, to create a cropped sub volume, I used crop volume. It works in other computers but in my pc, it does create a new sub volume but it does not show the cropped segments.…

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## [Rat Lungs Trouble](https://discourse.slicer.org/t/rat-lungs-trouble/7331)

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**Author:** [@ryann199](https://discourse.slicer.org/u/ryann199)\
**Replies:** 6\
**Last updated:** [July 1, 2019, 10:20pm UTC](https://discourse.slicer.org/t/rat-lungs-trouble/7331 "2019-07-01T22:20:55Z")

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Operating system: Linux Slicer version: 4.8.1 Expected behavior: I’m working with a DICOM file of rat’s lungs and according to my PI the file sizes are very large and because of that the program runs very slowly. I’ve …

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## [Data Import Error ](https://discourse.slicer.org/t/data-import-error/7264)

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**Author:** [@victoria](https://discourse.slicer.org/u/victoria)\
**Replies:** 5\
**Last updated:** [July 1, 2019, 12:27am UTC](https://discourse.slicer.org/t/data-import-error/7264 "2019-07-01T00:27:15Z")

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Operating system: Windows 10 Slicer version: 4.6.2 Expected behavior: volume data loading correctly - after data import, highlighted areas will show on the MRI imported using the DCM function Actual behavior: volume d…

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## [Maintenance of slicer.kitware.com planned on June 28th around 3.30pm](https://discourse.slicer.org/t/maintenance-of-slicer-kitware-com-planned-on-june-28th-around-3-30pm/7361)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 1\
**Last updated:** [June 30, 2019, 5:00pm UTC](https://discourse.slicer.org/t/maintenance-of-slicer-kitware-com-planned-on-june-28th-around-3-30pm/7361 "2019-06-30T17:00:18Z")

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In order to increase available space on the server, the server will have to be rebooted. Expected downtime is less than a minute.

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## [define default layers for all CT scans ](https://discourse.slicer.org/t/define-default-layers-for-all-ct-scans/7363)

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**Author:** [@a.tavallaie](https://discourse.slicer.org/u/a.tavallaie)\
**Replies:** 1\
**Last updated:** [June 30, 2019, 3:05pm UTC](https://discourse.slicer.org/t/define-default-layers-for-all-ct-scans/7363 "2019-06-30T15:05:12Z")

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I have almost 800 brain CT scan that I should label them same as segmentation, so define segments for each of them is too time-consuming. is there any approach to make default segments ( tissue, bone, etc) for all files? …

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## [Mask Creation Module](https://discourse.slicer.org/t/mask-creation-module/7359)

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**Author:** [@Jainey](https://discourse.slicer.org/u/Jainey)\
**Replies:** 1\
**Last updated:** [June 28, 2019, 10:56pm UTC](https://discourse.slicer.org/t/mask-creation-module/7359 "2019-06-28T22:56:03Z")

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Is it possible to apply a mask to a four D volume using mask creation, please? I have about 30 volumes of moving bones that I need to mask a few out of them If I apply a mask to the first frame or volume is there a way …

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## [Save data as ASCII](https://discourse.slicer.org/t/save-data-as-ascii/5623)

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**Author:** [@Hamburgerfinger](https://discourse.slicer.org/u/Hamburgerfinger)\
**Replies:** 3\
**Last updated:** [June 28, 2019, 3:45pm UTC](https://discourse.slicer.org/t/save-data-as-ascii/5623 "2019-06-28T15:45:36Z")

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Is there an option to save data as ASCII instead of binary? Thanks!

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## [Resolution clarity](https://discourse.slicer.org/t/resolution-clarity/7329)

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**Author:** [@jackyhan](https://discourse.slicer.org/u/jackyhan)\
**Replies:** 3\
**Last updated:** [June 28, 2019, 7:48am UTC](https://discourse.slicer.org/t/resolution-clarity/7329 "2019-06-28T07:48:50Z")

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I found that using 3D slicer to open DICOM image sequence, the resolution is very clear, but I use my own demo, ITK to read DICOM sequence, and then use VTK to display DICOM image, the resolution is very blurred, not 3D …

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## [How to change the color output of Level tracing](https://discourse.slicer.org/t/how-to-change-the-color-output-of-level-tracing/7323)

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**Author:** [@steve01](https://discourse.slicer.org/u/steve01)\
**Replies:** 6\
**Last updated:** [June 27, 2019, 4:36pm UTC](https://discourse.slicer.org/t/how-to-change-the-color-output-of-level-tracing/7323 "2019-06-27T16:36:01Z")

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Operating system: Mac OS El Capitan 10.11.6 Slicer version: 4.10.2 r28257 expected behavior: Actual behavior: I would like to change the color output of Level tracing. I do not know how to program. Is there a way of …

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