# Development

**URL:** https://discourse.slicer.org/c/dev/5.md?page=2

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

**Page:** 3

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## [How to get RF data from BK ultrasound devices](https://discourse.slicer.org/t/how-to-get-rf-data-from-bk-ultrasound-devices/31239)

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**Author:** [@Theo](https://discourse.slicer.org/u/Theo)\
**Replies:** 8\
**Last updated:** [March 19, 2026, 8:47am UTC](https://discourse.slicer.org/t/how-to-get-rf-data-from-bk-ultrasound-devices/31239 "2026-03-19T08:47:50Z")

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The slicer I developed and compiled needs to be connected to the BK ultrasound device through the cameralink mode of the plus server initiator to obtain raw RF data. I am not sure how to obtain RF data in the slicer code…

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## [Right-click context menu in slice views](https://discourse.slicer.org/t/right-click-context-menu-in-slice-views/25056)

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**Author:** [@giovform](https://discourse.slicer.org/u/giovform)\
**Replies:** 4\
**Last updated:** [March 18, 2026, 1:10pm UTC](https://discourse.slicer.org/t/right-click-context-menu-in-slice-views/25056 "2026-03-18T13:10:03Z")

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How can I programatically disable (and enable again) the right-click context menu in slice views?

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## [Need to turn of raycast for all segmentation node's except one in 3D view](https://discourse.slicer.org/t/need-to-turn-of-raycast-for-all-segmentation-nodes-except-one-in-3d-view/46464)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 6\
**Last updated:** [March 18, 2026, 9:24am UTC](https://discourse.slicer.org/t/need-to-turn-of-raycast-for-all-segmentation-nodes-except-one-in-3d-view/46464 "2026-03-18T09:24:53Z")

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Hello, I have a target tissue segmented using the Segment editor. And I have more than 150 ellipsoidal segmentation nodes in the scene and visible in the 3D views. And I have to draw a line on the views. When I draw the…

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## [Grow from seed module paper link outdated](https://discourse.slicer.org/t/grow-from-seed-module-paper-link-outdated/46373)

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**Author:** [@gaoyi.cn](https://discourse.slicer.org/u/gaoyi.cn)\
**Replies:** 1\
**Last updated:** [March 4, 2026, 1:02pm UTC](https://discourse.slicer.org/t/grow-from-seed-module-paper-link-outdated/46373 "2026-03-04T13:02:43Z")

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In the file: Modules/Loadable/Segmentations/EditorEffects/Python/SegmentEditorEffects/SegmentEditorGrowFromSeedsEffect.py: The effect uses fast grow-cut method. Links to the old MICCAI version of the paper. The link i…

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## [How to change the default file format for save](https://discourse.slicer.org/t/how-to-change-the-default-file-format-for-save/46278)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 2\
**Last updated:** [February 28, 2026, 4:01am UTC](https://discourse.slicer.org/t/how-to-change-the-default-file-format-for-save/46278 "2026-02-28T04:01:31Z")

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Hello, When we click on the save button the default file format for saving a scene is .mrml. Is there any way I can change it to .mrb? Is there a way to edit the config file so that the save data dialog opens with .mrb …

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## [Folder visibility confusing](https://discourse.slicer.org/t/folder-visibility-confusing/23753)

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**Author:** [@fbordignon](https://discourse.slicer.org/u/fbordignon)\
**Replies:** 6\
**Last updated:** [February 25, 2026, 2:26pm UTC](https://discourse.slicer.org/t/folder-visibility-confusing/23753 "2026-02-25T14:26:13Z")

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The eye icon is both loved and hated by our users, but I believe there is a confusing behavior for the folder eye icon. When I close the folder’s eye and have both 2D and 3D renderings, only the 3D hides: To confu…

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## [Aligning a markup plane to world coordinate system, with orthogonal planes](https://discourse.slicer.org/t/aligning-a-markup-plane-to-world-coordinate-system-with-orthogonal-planes/42032)

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**Author:** [@kat\_b](https://discourse.slicer.org/u/kat_b)\
**Replies:** 6\
**Last updated:** [February 23, 2026, 8:50pm UTC](https://discourse.slicer.org/t/aligning-a-markup-plane-to-world-coordinate-system-with-orthogonal-planes/42032 "2026-02-23T20:50:08Z")

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I am relatively new to 3D Slicer, and haven’t programmed in Python for a while, so please bear with me. In my Slicer environment, I have placed a scapular model (“Model”), and a markup plane (“P”) with associated points …

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## [Reproducing Nifti metadata](https://discourse.slicer.org/t/reproducing-nifti-metadata/46105)

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**Author:** [@Yaroslav\_Plutenko](https://discourse.slicer.org/u/Yaroslav_Plutenko)\
**Replies:** 10\
**Last updated:** [February 20, 2026, 11:12am UTC](https://discourse.slicer.org/t/reproducing-nifti-metadata/46105 "2026-02-20T11:12:07Z")

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Greetings! I have a question regarding Nifti format circulation. I’m developing a plugin that interacts with a remote repository and can upload/download images and whole datasets (viewing and fixing labels on the way if…

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## [How can I call 3D Slicer fully externally and automate a workflow? ](https://discourse.slicer.org/t/how-can-i-call-3d-slicer-fully-externally-and-automate-a-workflow/46042)

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**Author:** [@JoshMono](https://discourse.slicer.org/u/JoshMono)\
**Replies:** 6\
**Last updated:** [February 18, 2026, 4:33pm UTC](https://discourse.slicer.org/t/how-can-i-call-3d-slicer-fully-externally-and-automate-a-workflow/46042 "2026-02-18T16:33:43Z")

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Hey there folks. I’m working on a software assignment where my goal is to help automate a couple of tasks for my employer. My employer uses 3D Slicer, Meshlab and eventually Blender to make a 3D model from Dicom files a…

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## [Using the pyigtl Library to send data across a docker compose network](https://discourse.slicer.org/t/using-the-pyigtl-library-to-send-data-across-a-docker-compose-network/45859)

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**Author:** [@Oskey999](https://discourse.slicer.org/u/Oskey999)\
**Replies:** 5\
**Last updated:** [February 5, 2026, 12:02pm UTC](https://discourse.slicer.org/t/using-the-pyigtl-library-to-send-data-across-a-docker-compose-network/45859 "2026-02-05T12:02:59Z")

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Hello, I am trying to run SlicerTMS as two containers in a docker-compose but I am having issues using the pyigtl python library to send the data between the two containers. I have got a container to send the data from…

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## [Integration of Mimics-like contouring and edit (magnet + grab) functionality into 3D Slicer for segmentation of CT Lumbar bones](https://discourse.slicer.org/t/integration-of-mimics-like-contouring-and-edit-magnet-grab-functionality-into-3d-slicer-for-segmentation-of-ct-lumbar-bones/46000)

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**Author:** [@Mirza\_Ahmad\_Awais](https://discourse.slicer.org/u/Mirza_Ahmad_Awais)\
**Replies:** 1\
**Last updated:** [January 30, 2026, 6:50pm UTC](https://discourse.slicer.org/t/integration-of-mimics-like-contouring-and-edit-magnet-grab-functionality-into-3d-slicer-for-segmentation-of-ct-lumbar-bones/46000 "2026-01-30T18:50:06Z")

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Hello! I am trying to add contouring and edit contouring functionality into 3D slicer as a replacement to mimics or mimics-like tool so we can accurately segment lumbar bodies for surgical implant design purposes. Firstl…

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## [Visual DICOM browser update](https://discourse.slicer.org/t/visual-dicom-browser-update/45998)

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**Author:** [@Davide\_Punzo](https://discourse.slicer.org/u/Davide_Punzo)\
**Replies:** 1\
**Last updated:** [January 30, 2026, 1:09pm UTC](https://discourse.slicer.org/t/visual-dicom-browser-update/45998 "2026-01-30T13:09:40Z")

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Hey everyone, I have been working on major improvements to the visual DICOM browser: :bullseye: What’s New Performance for large datasets (both remote and local) Optimized for \>100GB databases Lazy thumbnail gener…

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## [Project tumor model onto skull surface for craniotomy planning / Extension "Trackerless Craniotomy Planning based on 3D Slicer "](https://discourse.slicer.org/t/project-tumor-model-onto-skull-surface-for-craniotomy-planning-extension-trackerless-craniotomy-planning-based-on-3d-slicer/45950)

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**Author:** [@thymallus](https://discourse.slicer.org/u/thymallus)\
**Replies:** 0\
**Last updated:** [January 27, 2026, 5:54pm UTC](https://discourse.slicer.org/t/project-tumor-model-onto-skull-surface-for-craniotomy-planning-extension-trackerless-craniotomy-planning-based-on-3d-slicer/45950 "2026-01-27T17:54:55Z")

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Hi, does this extension still exist? i can’t find it … can anyone help me? :slight\_smile: https://www.researchgate.net/publication/323739599\_Trackerless\_surgical\_image-guided\_system\_design\_using\_an\_intera…

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## [Kinect v2 \>OpenIGT\> 3D Slicer](https://discourse.slicer.org/t/kinect-v2-openigt-3d-slicer/45387)

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**Author:** [@HazemShereef](https://discourse.slicer.org/u/HazemShereef)\
**Replies:** 5\
**Last updated:** [January 25, 2026, 1:38pm UTC](https://discourse.slicer.org/t/kinect-v2-openigt-3d-slicer/45387 "2026-01-25T13:38:14Z")

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Hello, pardon me if what i am asking is obvious, I am a student still learning. So i have been trying to add a support for Kinect V2 device to the Plus toolkit however it seems very hard for me because of the layers and…

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## [Seeking Guidance: Developing a Real-Time 3D Visualization System Using 3D Slicer and IGT](https://discourse.slicer.org/t/seeking-guidance-developing-a-real-time-3d-visualization-system-using-3d-slicer-and-igt/41451)

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**Author:** [@Navneet](https://discourse.slicer.org/u/Navneet)\
**Replies:** 10\
**Last updated:** [January 25, 2026, 12:39pm UTC](https://discourse.slicer.org/t/seeking-guidance-developing-a-real-time-3d-visualization-system-using-3d-slicer-and-igt/41451 "2026-01-25T12:39:02Z")

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Hello 3D Slicer Community, I’m currently working on a project that involves real-time 3D visualization and tracking for image-guided surgery using 3D Slicer. The goal is to create a system that integrates medical imagin…

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## [Fedora 43 build error (curl / libzstd)](https://discourse.slicer.org/t/fedora-43-build-error-curl-libzstd/45836)

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**Author:** [@codeling](https://discourse.slicer.org/u/codeling)\
**Replies:** 0\
**Last updated:** [January 19, 2026, 10:34pm UTC](https://discourse.slicer.org/t/fedora-43-build-error-curl-libzstd/45836 "2026-01-19T22:34:59Z")

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On Fedora 43, I get this error when building slicer: \[20/2591\] Linking CXX shared library bin/libRemoteIO.so FAILED: \[code=1\] bin/libRemoteIO.so : && /usr/bin/c++ -fPIC -Wall -Wextra -Wpointer-arith -Winvalid-pch -Wcas…

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## [How do i convert dcm files in segment editor..i m getting a lot of errors..i need this for my cbct analysis of tooth n pulp volume](https://discourse.slicer.org/t/how-do-i-convert-dcm-files-in-segment-editor-i-m-getting-a-lot-of-errors-i-need-this-for-my-cbct-analysis-of-tooth-n-pulp-volume/45829)

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**Author:** [@Sravya\_Guda](https://discourse.slicer.org/u/Sravya_Guda)\
**Replies:** 1\
**Last updated:** [January 19, 2026, 6:56pm UTC](https://discourse.slicer.org/t/how-do-i-convert-dcm-files-in-segment-editor-i-m-getting-a-lot-of-errors-i-need-this-for-my-cbct-analysis-of-tooth-n-pulp-volume/45829 "2026-01-19T18:56:49Z")

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I have to make a cbct analysis of pulp and tooth volume of tooth..so I was using batch dentalsegmentator. While I m trying to convert my dcm files into extension files..folder shoes empty in both input n output folder…I …

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## [How to change from Radiological view to Neurological view?](https://discourse.slicer.org/t/how-to-change-from-radiological-view-to-neurological-view/45744)

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**Author:** [@Suhaim](https://discourse.slicer.org/u/Suhaim)\
**Replies:** 9\
**Last updated:** [January 14, 2026, 2:18pm UTC](https://discourse.slicer.org/t/how-to-change-from-radiological-view-to-neurological-view/45744 "2026-01-14T14:18:10Z")

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Hi, I have built Slicer and wanted to change the view orientation of the application’s slices. I did what was said here, where the .ini config file is modified. This is the relevant part of my .config file :- \[DefaultS…

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## [Objects in-memory exchange between modules](https://discourse.slicer.org/t/objects-in-memory-exchange-between-modules/45770)

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**Author:** [@Yaroslav\_Plutenko](https://discourse.slicer.org/u/Yaroslav_Plutenko)\
**Replies:** 2\
**Last updated:** [January 13, 2026, 6:59pm UTC](https://discourse.slicer.org/t/objects-in-memory-exchange-between-modules/45770 "2026-01-13T18:59:08Z")

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Greeting! I’m developing a few scripted modules for plant MRI data processing and lifecycle management, two of which act as clients for a remote FastAPI server. The modules have different purposes; therefore, they are k…

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## [Objects in-memory exchange between modules](https://discourse.slicer.org/t/objects-in-memory-exchange-between-modules/45771)

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**Author:** [@Yaroslav\_Plutenko](https://discourse.slicer.org/u/Yaroslav_Plutenko)\
**Replies:** 0\
**Last updated:** [January 13, 2026, 4:02pm UTC](https://discourse.slicer.org/t/objects-in-memory-exchange-between-modules/45771 "2026-01-13T16:02:17Z")

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Greeting! I’m developing a few scripted modules for plant MRI data processing and lifecycle management, two of which act as clients for a remote FastAPI server. The modules have different purposes; therefore, they are k…

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## [Is there any way to know if a vtkMRMLNode has been renamed?](https://discourse.slicer.org/t/is-there-any-way-to-know-if-a-vtkmrmlnode-has-been-renamed/45717)

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**Author:** [@Suhaim](https://discourse.slicer.org/u/Suhaim)\
**Replies:** 5\
**Last updated:** [January 13, 2026, 3:55am UTC](https://discourse.slicer.org/t/is-there-any-way-to-know-if-a-vtkmrmlnode-has-been-renamed/45717 "2026-01-13T03:55:36Z")

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Hi all, If you create a markup node(vtkMRMLMarkupsNode) and add control points to it, the control points are named using a default format(“%N-%d”) with respect to the current name of the markup node. Renaming a markup …

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## [Include functionality of control point status in custom scripted module](https://discourse.slicer.org/t/include-functionality-of-control-point-status-in-custom-scripted-module/45658)

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**Author:** [@W.J.Heerink](https://discourse.slicer.org/u/W.J.Heerink)\
**Replies:** 6\
**Last updated:** [January 12, 2026, 4:34pm UTC](https://discourse.slicer.org/t/include-functionality-of-control-point-status-in-custom-scripted-module/45658 "2026-01-12T16:34:08Z")

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Hi, I really like the use of the control point status as it is implemented in the Markups module. I mainly use the functionality of the buttons in the column of the table to change the status of individual control points…

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## [Build Error: \_ffi\_type\_longdouble symbol not found for arm64 during Python build](https://discourse.slicer.org/t/build-error-ffi-type-longdouble-symbol-not-found-for-arm64-during-python-build/45650)

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**Author:** [@salim](https://discourse.slicer.org/u/salim)\
**Replies:** 8\
**Last updated:** [January 12, 2026, 3:17pm UTC](https://discourse.slicer.org/t/build-error-ffi-type-longdouble-symbol-not-found-for-arm64-during-python-build/45650 "2026-01-12T15:17:36Z")

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Hello Slicer Community, I am encountering a linker error while building 3D Slicer from source on Apple Silicon. The build fails at approximately 51% during the \_freeze\_importlib step of the Python internal build. 51%\]…

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## [Plane-Cut on segment's labelmap](https://discourse.slicer.org/t/plane-cut-on-segments-labelmap/45737)

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**Author:** [@shanfl](https://discourse.slicer.org/u/shanfl)\
**Replies:** 1\
**Last updated:** [January 11, 2026, 10:39pm UTC](https://discourse.slicer.org/t/plane-cut-on-segments-labelmap/45737 "2026-01-11T22:39:49Z")

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I need to plane-cut a labelmap of a segment with a vtkplanewidget, but the cutting position is not correct.I think there might be an issue with the conversion from voxel ijk coordinates to RAS coordinates, but I can’t pi…

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## [How to update widget from logic?](https://discourse.slicer.org/t/how-to-update-widget-from-logic/45671)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 4\
**Last updated:** [January 7, 2026, 3:47am UTC](https://discourse.slicer.org/t/how-to-update-widget-from-logic/45671 "2026-01-07T03:47:09Z")

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I have a C++ extension module. I am doing boolean mesh operation calculation in a worker thread inside the logic module. I have a function that calculates the volume of a given segmentation node. I need it run as soon as…

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## [How to add shortcut to delete item in subject hierarchy](https://discourse.slicer.org/t/how-to-add-shortcut-to-delete-item-in-subject-hierarchy/42603)

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**Author:** [@josephtandio27](https://discourse.slicer.org/u/josephtandio27)\
**Replies:** 6\
**Last updated:** [January 1, 2026, 7:50pm UTC](https://discourse.slicer.org/t/how-to-add-shortcut-to-delete-item-in-subject-hierarchy/42603 "2026-01-01T19:50:57Z")

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Hi, may I know how to add shortcut to delete highlighted item in subject hierarchy? Right now, I can only delete it by selecting the item, and then right-click delete.

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## [Is it possible to update closed surface of a segment instead of removing closed surface when underlying vtkImageData is modified?](https://discourse.slicer.org/t/is-it-possible-to-update-closed-surface-of-a-segment-instead-of-removing-closed-surface-when-underlying-vtkimagedata-is-modified/45639)

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**Author:** [@Vincent](https://discourse.slicer.org/u/Vincent)\
**Replies:** 1\
**Last updated:** [December 30, 2025, 3:34pm UTC](https://discourse.slicer.org/t/is-it-possible-to-update-closed-surface-of-a-segment-instead-of-removing-closed-surface-when-underlying-vtkimagedata-is-modified/45639 "2025-12-30T15:34:58Z")

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Hi, I am trying to modify a segment by modifying the underlying binary label map (an instance of vtkImageData) in C++. When modified() of vtkImageData is called, the closed surface of the segment is removed automatical…

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## [Proposal: Install SimpleITK from wheels instead of building from source](https://discourse.slicer.org/t/proposal-install-simpleitk-from-wheels-instead-of-building-from-source/25635)

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**Author:** [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Replies:** 4\
**Last updated:** [December 26, 2025, 10:51pm UTC](https://discourse.slicer.org/t/proposal-install-simpleitk-from-wheels-instead-of-building-from-source/25635 "2025-12-26T22:51:55Z")

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Now that Slicer PR-6564 adding support for building ITK with a custom namespace has been integrated, installing SimpleITK from wheels should be possible. Pros: Reduced build time by a factor x2 (and probably more on w…

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## [Is there an existing trame-slicer docker image?](https://discourse.slicer.org/t/is-there-an-existing-trame-slicer-docker-image/45481)

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**Author:** [@rlhisey](https://discourse.slicer.org/u/rlhisey)\
**Replies:** 4\
**Last updated:** [December 19, 2025, 7:07am UTC](https://discourse.slicer.org/t/is-there-an-existing-trame-slicer-docker-image/45481 "2025-12-19T07:07:20Z")

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Hi, I’m looking for a way to create a basic Slicer application on the web using trame-slicer. Ideally, I think I’d like to run it in a docker container to make it somewhat portable. Is there an existing, recommended dock…

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## [How to suppress the Window not responding - force quit/wait error message in ubuntu?](https://discourse.slicer.org/t/how-to-suppress-the-window-not-responding-force-quit-wait-error-message-in-ubuntu/45516)

<div class="topic-metadata">

**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 5\
**Last updated:** [December 18, 2025, 11:06pm UTC](https://discourse.slicer.org/t/how-to-suppress-the-window-not-responding-force-quit-wait-error-message-in-ubuntu/45516 "2025-12-18T23:06:05Z")

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Hello, In my extension I need to add a particular number of segmentation nodes that are ellipsoidal to the scene. After adding I am transforming them to a particular point one by one. But when the number of segmentatio…

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