# \#slicerigt

**URL:** https://discourse.slicer.org/tag/slicerigt/43.md

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

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## [NDI Polaris Lyra + 3D Slicer OpenIGTLink: How to Keep Registration Valid After Moving the Phantom?](https://discourse.slicer.org/t/ndi-polaris-lyra-3d-slicer-openigtlink-how-to-keep-registration-valid-after-moving-the-phantom/47234)

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**Author:** [@AdamDomafoldi](https://discourse.slicer.org/u/AdamDomafoldi)\
**Replies:** 4\
**Last updated:** [June 6, 2026, 5:14pm UTC](https://discourse.slicer.org/t/ndi-polaris-lyra-3d-slicer-openigtlink-how-to-keep-registration-valid-after-moving-the-phantom/47234 "2026-06-06T17:14:57Z")

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Hello, I have been experimenting with the NDI Polaris Lyra and Slicer OpenIGTLink. I have read all the documentation and, after numerous attempts, I think I have some parts working, but I would like to ask for help. Wh…

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## [OpenIGTLinkIF not updating transforms](https://discourse.slicer.org/t/openigtlinkif-not-updating-transforms/36992)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 6\
**Last updated:** [April 4, 2026, 8:31pm UTC](https://discourse.slicer.org/t/openigtlinkif-not-updating-transforms/36992 "2026-04-04T20:31:45Z")

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I am trying to troubleshoot using an NDI trakSTAR electromagnetic 3D tracker using OpenIGTLinkIF. I have gotten the same system working on other computers, but am running into an odd error where the tracked transforms a…

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## [Linear transform not appearing anymore as a driver in IGT Volume Reslicer Driver](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497)

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**Author:** [@spichardo](https://discourse.slicer.org/u/spichardo)\
**Replies:** 1\
**Last updated:** [December 16, 2025, 5:35am UTC](https://discourse.slicer.org/t/linear-transform-not-appearing-anymore-as-a-driver-in-igt-volume-reslicer-driver/45497 "2025-12-16T05:35:57Z")

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Hi, I got this new issue in r5.10.0 of 3DSlicer and SlicerIGT (Revision: 71e2153). I create a new linear transformation to be used in the IGT Volume Reslicer Driver, but the linear transform does not appear in the list…

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## [Regarding the link to lesson U-03 in "Common Topics" on the SlicerIGT tutorial page](https://discourse.slicer.org/t/regarding-the-link-to-lesson-u-03-in-common-topics-on-the-slicerigt-tutorial-page/45119)

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**Author:** [@Jun\_HASHIMOTO](https://discourse.slicer.org/u/Jun_HASHIMOTO)\
**Replies:** 2\
**Last updated:** [November 21, 2025, 9:35am UTC](https://discourse.slicer.org/t/regarding-the-link-to-lesson-u-03-in-common-topics-on-the-slicerigt-tutorial-page/45119 "2025-11-21T09:35:55Z")

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On the SlicerIGT tutorial page, the link for lesson U-03 in the “Common Topics” section is broken and I cannot open it. I wanted to connect the NDI Aurora Sensor to 3D Slicer using the Plus Toolkit and import the positio…

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## [Controlling Volume Reslice Driver to follow 5DOF inplane view of tool](https://discourse.slicer.org/t/controlling-volume-reslice-driver-to-follow-5dof-inplane-view-of-tool/44712)

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**Author:** [@ruffsl](https://discourse.slicer.org/u/ruffsl)\
**Replies:** 4\
**Last updated:** [October 10, 2025, 11:09pm UTC](https://discourse.slicer.org/t/controlling-volume-reslice-driver-to-follow-5dof-inplane-view-of-tool/44712 "2025-10-10T23:09:06Z")

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I’d like show a 5DOF inplane view of needle using the Volume Reslice Driver extension, with the 6th DOF rotation locked in alignment with respect to a canonical axis in the global RAS reference frame, providing a more gr…

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## [Cannot import name 'vtkMRMLPathPlannerTrajectoryNode' at launch](https://discourse.slicer.org/t/cannot-import-name-vtkmrmlpathplannertrajectorynode-at-launch/44227)

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**Author:** [@ruffsl](https://discourse.slicer.org/u/ruffsl)\
**Replies:** 1\
**Last updated:** [October 9, 2025, 2:17am UTC](https://discourse.slicer.org/t/cannot-import-name-vtkmrmlpathplannertrajectorynode-at-launch/44227 "2025-10-09T02:17:43Z")

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I have a working scripted extension that enables a user to select a path within any chosen trajectory list, as generated via the separate PathExplorer widget from the SlicerIGT extension: SlicerIGT/PathExplorer at m…

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## [Missing prebuilds for IGT extensions for Preview Release 5.9](https://discourse.slicer.org/t/missing-prebuilds-for-igt-extensions-for-preview-release-5-9/44143)

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**Author:** [@ruffsl](https://discourse.slicer.org/u/ruffsl)\
**Replies:** 13\
**Last updated:** [August 28, 2025, 2:42pm UTC](https://discourse.slicer.org/t/missing-prebuilds-for-igt-extensions-for-preview-release-5-9/44143 "2025-08-28T14:42:20Z")

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Hello, I’m developing slicelet for image guided therapy, particularly a scripted slicelet for simpler R&D. Ideally we’d like to use the Preview Release of Slicer 5.9 that ships with a more recent version of Python 3.12, …

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## [Can SlicerIGT Fiducial Registration Wizard use global coordinates instead of RAS?](https://discourse.slicer.org/t/can-slicerigt-fiducial-registration-wizard-use-global-coordinates-instead-of-ras/44007)

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**Author:** [@Noam\_Borenstein](https://discourse.slicer.org/u/Noam_Borenstein)\
**Replies:** 3\
**Last updated:** [August 8, 2025, 8:49pm UTC](https://discourse.slicer.org/t/can-slicerigt-fiducial-registration-wizard-use-global-coordinates-instead-of-ras/44007 "2025-08-08T20:49:28Z")

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Hi everyone! I am working with a tracked knee model using an NDI camera. I am trying to find the transform between two sets of moving point lists using the fiducial registration wizard. If I move a point in the local/RA…

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## [Tracking Ball Fiducials in Slicer IGT](https://discourse.slicer.org/t/tracking-ball-fiducials-in-slicer-igt/40806)

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**Author:** [@goodac](https://discourse.slicer.org/u/goodac)\
**Replies:** 0\
**Last updated:** [December 19, 2024, 5:07pm UTC](https://discourse.slicer.org/t/tracking-ball-fiducials-in-slicer-igt/40806 "2024-12-19T17:07:03Z")

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Hello, I have been working on tracking fiducials for a while, and have managed to run the ArUco tracking with Plus Server successfully. However, we would like to be able to track instruments with standard navigation ar…

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## [Coordinate error when outputting VTK model](https://discourse.slicer.org/t/coordinate-error-when-outputting-vtk-model/40154)

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**Author:** [@yoonjh119](https://discourse.slicer.org/u/yoonjh119)\
**Replies:** 2\
**Last updated:** [November 24, 2024, 11:40am UTC](https://discourse.slicer.org/t/coordinate-error-when-outputting-vtk-model/40154 "2024-11-24T11:40:50Z")

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I am writing a code to read a nifiti file with python code, convert it to vtk format, and save it again. When I display the output result in a slicer, the location is different. Below is the output result (original in re…

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## [Fiducials configuration for spatial calibration with no streaming of 'StylusToProbe' transform](https://discourse.slicer.org/t/fiducials-configuration-for-spatial-calibration-with-no-streaming-of-stylustoprobe-transform/13326)

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**Author:** [@AurelieS](https://discourse.slicer.org/u/AurelieS)\
**Replies:** 8\
**Last updated:** [November 4, 2024, 1:52pm UTC](https://discourse.slicer.org/t/fiducials-configuration-for-spatial-calibration-with-no-streaming-of-stylustoprobe-transform/13326 "2024-11-04T13:52:46Z")

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Hi (again…), I am sorry for all the topics, 3D ultrasound is quite new for me and some aspects are still blurry… I followed your tutorial U31 for spatial calibration of my ultrasound probe. The problem is that the int…

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## [TextureModel Issue](https://discourse.slicer.org/t/texturemodel-issue/39902)

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**Author:** [@Jack95](https://discourse.slicer.org/u/Jack95)\
**Replies:** 2\
**Last updated:** [October 28, 2024, 9:31pm UTC](https://discourse.slicer.org/t/texturemodel-issue/39902 "2024-10-28T21:31:54Z")

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Hello all, I am running into an issue trying to apply textures to my 3D models (mainly to assist in landmarking). Previously (a few months ago) I had no problem applying these same textures in 3D slicer using the Tex…

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## [SlicerIGT tutorial](https://discourse.slicer.org/t/slicerigt-tutorial/39738)

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**Author:** [@DanielGu](https://discourse.slicer.org/u/DanielGu)\
**Replies:** 10\
**Last updated:** [October 18, 2024, 3:15pm UTC](https://discourse.slicer.org/t/slicerigt-tutorial/39738 "2024-10-18T15:15:19Z")

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Hi, I’m a very beginner of 3dslicer and slicerIGT, and I would like to connect my webcam to 3dslicer by using slicerigt I’ve changed CaptureDeviceID, Framesize, Videoformat, also port, but still ‘conn…

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## [Temporal calibration in 3D slicer](https://discourse.slicer.org/t/temporal-calibration-in-3d-slicer/33876)

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**Author:** [@MReza](https://discourse.slicer.org/u/MReza)\
**Replies:** 7\
**Last updated:** [October 16, 2024, 9:13am UTC](https://discourse.slicer.org/t/temporal-calibration-in-3d-slicer/33876 "2024-10-16T09:13:17Z")

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Hello, I’m wondering if it’s possible to perform temporal calibration in 3D Slicer as well. According to the Slicer IGT tutorial, temporal calibration seems to require the use of fCal. However, using fCal for temporal c…

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## [IJCARS paper using Slicer for neurosurgery research](https://discourse.slicer.org/t/ijcars-paper-using-slicer-for-neurosurgery-research/17657)

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**Author:** [@pieper](https://discourse.slicer.org/u/pieper)\
**Replies:** 1\
**Last updated:** [October 15, 2024, 9:43pm UTC](https://discourse.slicer.org/t/ijcars-paper-using-slicer-for-neurosurgery-research/17657 "2024-10-15T21:43:46Z")

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This paper just came out about neurosurgery work at University College London in the UK using Slicer. They have a lot of good things to say, but I particularly liked this line: We chose to build the system using 3D …

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## [Play custom sound with Breach Warning?](https://discourse.slicer.org/t/play-custom-sound-with-breach-warning/36790)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 7\
**Last updated:** [June 21, 2024, 7:26pm UTC](https://discourse.slicer.org/t/play-custom-sound-with-breach-warning/36790 "2024-06-21T19:26:59Z")

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For trainee feedback when using a flexible scope with a electromagnetically tracked tip on a 3D printed mannequin airway, we would like to implement playing of sounds when certain areas are entered or touched. Slicer IG…

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## [Error while liveAI volume reconstrcution](https://discourse.slicer.org/t/error-while-liveai-volume-reconstrcution/36525)

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**Author:** [@MReza](https://discourse.slicer.org/u/MReza)\
**Replies:** 3\
**Last updated:** [June 1, 2024, 4:32pm UTC](https://discourse.slicer.org/t/error-while-liveai-volume-reconstrcution/36525 "2024-06-01T16:32:55Z")

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Hello everyone, I am trying to work with the live AI segmentation as shown in the YouTube video and the related PowerPoint. Although I have followed the exact same procedure, after inputting the mrb file, when I try to …

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## [Is it possible to move and rotate a model in 3d view and get the transformtion matrix?](https://discourse.slicer.org/t/is-it-possible-to-move-and-rotate-a-model-in-3d-view-and-get-the-transformtion-matrix/35923)

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**Author:** [@tdchen](https://discourse.slicer.org/u/tdchen)\
**Replies:** 19\
**Last updated:** [May 8, 2024, 5:11pm UTC](https://discourse.slicer.org/t/is-it-possible-to-move-and-rotate-a-model-in-3d-view-and-get-the-transformtion-matrix/35923 "2024-05-08T17:11:25Z")

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I can change the transformation matrix to make a model moves in 3d view. But how can I do the opposite that move and rotate a model in 3d view and get its transformation matrix? Any method or suggestion? Thanks.

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## [SlicerIGT interface to Aimooe AimPosition position tracker](https://discourse.slicer.org/t/slicerigt-interface-to-aimooe-aimposition-position-tracker/18266)

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**Author:** [@BrGiao](https://discourse.slicer.org/u/BrGiao)\
**Replies:** 7\
**Last updated:** [January 2, 2024, 5:28pm UTC](https://discourse.slicer.org/t/slicerigt-interface-to-aimooe-aimposition-position-tracker/18266 "2024-01-02T17:28:18Z")

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We want to connect our optical tracking device to 3Dslice’s slicerIGT module for the surgical navigation simulation shown below, but our device is not supported by Plus, how do I connect the two?

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## [Visualize tracked ultrasound in 3D with PNG images and pose matrices](https://discourse.slicer.org/t/visualize-tracked-ultrasound-in-3d-with-png-images-and-pose-matrices/33096)

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**Author:** [@ziri](https://discourse.slicer.org/u/ziri)\
**Replies:** 1\
**Last updated:** [November 29, 2023, 3:39am UTC](https://discourse.slicer.org/t/visualize-tracked-ultrasound-in-3d-with-png-images-and-pose-matrices/33096 "2023-11-29T03:39:55Z")

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Hi, I’m trying to create a sequence file from a folder of ultrasound images in png format with poses stored in a csv file and then visualize in 3D. I successfully created the .mhd header file containing the pose informa…

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## [Confused trying to use Bullseye in SlicerIGT Viewpoint module to locate and point a camera view](https://discourse.slicer.org/t/confused-trying-to-use-bullseye-in-slicerigt-viewpoint-module-to-locate-and-point-a-camera-view/26410)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 9\
**Last updated:** [October 11, 2023, 12:31pm UTC](https://discourse.slicer.org/t/confused-trying-to-use-bullseye-in-slicerigt-viewpoint-module-to-locate-and-point-a-camera-view/26410 "2023-10-11T12:31:38Z")

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Hello, I am trying to have a 3D view camera in Slicer follow the position and orientation of a tracked tool using SlicerIGT. By following the tutorials I have successfully tracked a tool and gone through the pivot and s…

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## [Transformation Between Two Tools](https://discourse.slicer.org/t/transformation-between-two-tools/18958)

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**Author:** [@jasmine-lou](https://discourse.slicer.org/u/jasmine-lou)\
**Replies:** 7\
**Last updated:** [August 14, 2023, 1:52pm UTC](https://discourse.slicer.org/t/transformation-between-two-tools/18958 "2023-08-14T13:52:49Z")

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Hello! Is there any way in Slicer to easily obtain the transform between two tools? I am using the NDI Aurora Tracker with two coils, and can currently obtain transforms between each of the coils and the Aurora tracker,…

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## [Tracked ultrasound using SlicerIGT ](https://discourse.slicer.org/t/tracked-ultrasound-using-slicerigt/29808)

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**Author:** [@farhanbme](https://discourse.slicer.org/u/farhanbme)\
**Replies:** 3\
**Last updated:** [June 4, 2023, 12:45pm UTC](https://discourse.slicer.org/t/tracked-ultrasound-using-slicerigt/29808 "2023-06-04T12:45:28Z")

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Hi, I want to use SlicerIGT for tracking real-time Ultrasond using aruco markers. Please guide what steps do I need to follow, hardward setup required? thanks

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## [The voxel size in IGT Volume Reconstruction](https://discourse.slicer.org/t/the-voxel-size-in-igt-volume-reconstruction/28273)

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**Author:** [@LV52](https://discourse.slicer.org/u/LV52)\
**Replies:** 0\
**Last updated:** [March 10, 2023, 8:49am UTC](https://discourse.slicer.org/t/the-voxel-size-in-igt-volume-reconstruction/28273 "2023-03-10T08:49:30Z")

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I have used the openigtlink to transmit the ultrasound image and 3d position into 3d slicer. Then I uesd IGT Volume Reconstruction to reconstruct the 3d ultrasound volume. In the Image volume the voxel size(image spaci…

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## [Volume Reslice for Calibrated Ultrasound Images](https://discourse.slicer.org/t/volume-reslice-for-calibrated-ultrasound-images/11546)

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**Author:** [@Winona\_Richey](https://discourse.slicer.org/u/Winona_Richey)\
**Replies:** 4\
**Last updated:** [February 15, 2023, 4:19am UTC](https://discourse.slicer.org/t/volume-reslice-for-calibrated-ultrasound-images/11546 "2023-02-15T04:19:33Z")

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Operating system: Windows 7 and MacOS 10.14.6 Slicer version: 4.10.1 Expected behavior: 1. Set the incoming tracked image as the driver for the corresponding 2D viewer. 2. Find the appropriate mode from the Mode list …

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## [Tracking of multiple objects to a reference](https://discourse.slicer.org/t/tracking-of-multiple-objects-to-a-reference/27450)

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**Author:** [@MPeiffer](https://discourse.slicer.org/u/MPeiffer)\
**Replies:** 6\
**Last updated:** [January 27, 2023, 6:28pm UTC](https://discourse.slicer.org/t/tracking-of-multiple-objects-to-a-reference/27450 "2023-01-27T18:28:47Z")

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Hi all, I’ve been working with slicerIGT to create a surgical navigation tool for the ankle. In this tool, we want to track the position of the Fibula (calf bone) with respect to the reference Tibia (shin bone). To tr…

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## [How rotate images in a sequence?](https://discourse.slicer.org/t/how-rotate-images-in-a-sequence/26522)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 6\
**Last updated:** [December 3, 2022, 8:10pm UTC](https://discourse.slicer.org/t/how-rotate-images-in-a-sequence/26522 "2022-12-03T20:10:50Z")

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How to “anti-Transverse” for a sequence? Or, how to do inplane rotation for images in a sequence for 90 degree (not 3D rotation, but 2D in-plane rotation)? Hi everyone, I need help fixing a sequence of linear transform…

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## [How to add a calculated (instead of data input from OpenIGTLInk IO) proxy node in SequenceBrowser when recording an ultrasound sequences?](https://discourse.slicer.org/t/how-to-add-a-calculated-instead-of-data-input-from-openigtlink-io-proxy-node-in-sequencebrowser-when-recording-an-ultrasound-sequences/25133)

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**Author:** [@sunshine](https://discourse.slicer.org/u/sunshine)\
**Replies:** 0\
**Last updated:** [September 7, 2022, 4:25am UTC](https://discourse.slicer.org/t/how-to-add-a-calculated-instead-of-data-input-from-openigtlink-io-proxy-node-in-sequencebrowser-when-recording-an-ultrasound-sequences/25133 "2022-09-07T04:25:22Z")

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Hi everyone, I am trying to write my first extension module to do a real-time ultrasound annotation. I am now able to write a module for offline annotation with ultrasound sequences recorded as SequenceBrowsers in modu…

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## [Sending Transformed Ultrasound Data to Unity for AR Overlay](https://discourse.slicer.org/t/sending-transformed-ultrasound-data-to-unity-for-ar-overlay/7925)

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**Author:** [@David\_Asgar-Deen](https://discourse.slicer.org/u/David_Asgar-Deen)\
**Replies:** 5\
**Last updated:** [June 13, 2022, 1:16pm UTC](https://discourse.slicer.org/t/sending-transformed-ultrasound-data-to-unity-for-ar-overlay/7925 "2022-06-13T13:16:46Z")

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Hello, Thank you for taking the time to read this post. I am currently working on visualizing ultrasound slice data through a semi-transparent mirror AR display and was hoping to get some help sending the data to Unity.…

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## [SlicerIGT module loading issue](https://discourse.slicer.org/t/slicerigt-module-loading-issue/23643)

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**Author:** [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Replies:** 9\
**Last updated:** [June 3, 2022, 11:07am UTC](https://discourse.slicer.org/t/slicerigt-module-loading-issue/23643 "2022-06-03T11:07:49Z")

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I’m trying to use the latest SlicerIGT, which now requires SlicerIGSIO. I use the latest of this as well. I have Slicer built in release mode, from May 5 (this hash). I built SlicerIGSIO and SlicerIGT with the default …

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