# Support

**URL:** https://discourse.slicer.org/c/support/11.md?no_subcategories=false&page=10

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

**Page:** 11

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## [OpenDose3D module is not loaded](https://discourse.slicer.org/t/opendose3d-module-is-not-loaded/36045)

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**Author:** [@Huihui](https://discourse.slicer.org/u/Huihui)\
**Replies:** 6\
**Last updated:** [April 13, 2026, 12:48am UTC](https://discourse.slicer.org/t/opendose3d-module-is-not-loaded/36045 "2026-04-13T00:48:53Z")

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Hi there, I’m trying to install OpedDose3D extension, but the module can not be loaded. Could anyone please help me? Thanks! Operating system: Windows Slicer version: 5.6.0 Expected behavior: Actual behavior:

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## [My dental segmentator does not work please help](https://discourse.slicer.org/t/my-dental-segmentator-does-not-work-please-help/46408)

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**Author:** [@TongJunLi](https://discourse.slicer.org/u/TongJunLi)\
**Replies:** 3\
**Last updated:** [April 12, 2026, 7:39pm UTC](https://discourse.slicer.org/t/my-dental-segmentator-does-not-work-please-help/46408 "2026-04-12T19:39:55Z")

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## [Landmark-based alignment of separate CT elements](https://discourse.slicer.org/t/landmark-based-alignment-of-separate-ct-elements/46670)

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**Author:** [@JaredAmudeo](https://discourse.slicer.org/u/JaredAmudeo)\
**Replies:** 2\
**Last updated:** [April 12, 2026, 11:31am UTC](https://discourse.slicer.org/t/landmark-based-alignment-of-separate-ct-elements/46670 "2026-04-12T11:31:49Z")

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Dear all, I hope you are doing well. I am reaching out in search of guidance and advice. I would like to know whether it is possible, using landmarks or point-based methods (I am not very familiar with this, so I apolo…

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## [Problem boolean operations to make fibula surgical guide](https://discourse.slicer.org/t/problem-boolean-operations-to-make-fibula-surgical-guide/46713)

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**Author:** [@Marco\_Sarcinella](https://discourse.slicer.org/u/Marco_Sarcinella)\
**Replies:** 2\
**Last updated:** [April 11, 2026, 5:51pm UTC](https://discourse.slicer.org/t/problem-boolean-operations-to-make-fibula-surgical-guide/46713 "2026-04-11T17:51:44Z")

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Hello! Hello! I would like to solve a problem with you. Often, after pressing the “make boolean operations to surgical guide base” button, an alert appears saying: ERROR: Boolean operations to make fibula surgical gu…

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## [Slicer is so buggy and keeps showing error on macbook air M5](https://discourse.slicer.org/t/slicer-is-so-buggy-and-keeps-showing-error-on-macbook-air-m5/46687)

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**Author:** [@sathishbalachandran](https://discourse.slicer.org/u/sathishbalachandran)\
**Replies:** 11\
**Last updated:** [April 11, 2026, 3:58am UTC](https://discourse.slicer.org/t/slicer-is-so-buggy-and-keeps-showing-error-on-macbook-air-m5/46687 "2026-04-11T03:58:23Z")

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Hello Slicer Support Team, I am a Radiation Oncologist (MD, DNB) attempting to use 3D Slicer for my daily clinical cases (1-2 cases/day). I recently moved from an old, basic Windows laptop to a new MacBook Air M5, but t…

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## [Experiment auto-optimize volume rendering](https://discourse.slicer.org/t/experiment-auto-optimize-volume-rendering/46711)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 0\
**Last updated:** [April 11, 2026, 12:42am UTC](https://discourse.slicer.org/t/experiment-auto-optimize-volume-rendering/46711 "2026-04-11T00:42:06Z")

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Hi, Seeing this post today: Sharing custom presets - #4 by muratmaga I tried to make a script that calls Slicer, screenshots a 3D picture of the CTChest data set with a custom property and tries to optimize the custom …

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## [Please help me. I've tried everything i known](https://discourse.slicer.org/t/please-help-me-ive-tried-everything-i-known/46702)

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**Author:** [@Tech-Liuxy](https://discourse.slicer.org/u/Tech-Liuxy)\
**Replies:** 1\
**Last updated:** [April 10, 2026, 1:08am UTC](https://discourse.slicer.org/t/please-help-me-ive-tried-everything-i-known/46702 "2026-04-10T01:08:10Z")

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\##MAC TAHOE26 Processing started Writing input file to /private/var/folders/c2/7ytv4ycx59z72y4bcl8dfplh0000gn/T/Slicer-liuxy/\_\_SlicerTemp\_\_2026-04-09\_14+44+48.430/total-segmentator-input.nii Creating segmentations wit…

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## [Best tutorials and added tools for volume rendering](https://discourse.slicer.org/t/best-tutorials-and-added-tools-for-volume-rendering/46688)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 6\
**Last updated:** [April 9, 2026, 9:52pm UTC](https://discourse.slicer.org/t/best-tutorials-and-added-tools-for-volume-rendering/46688 "2026-04-09T21:52:48Z")

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The flexibility of the volume rendering feature is quite impressive, and it seems like this would be useful for finding things in 3D (not just making them pretty). Are there any good expert tutorials that go through how…

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## [Orbital wall segmentation and bridging defects](https://discourse.slicer.org/t/orbital-wall-segmentation-and-bridging-defects/46703)

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**Author:** [@hungryjoe](https://discourse.slicer.org/u/hungryjoe)\
**Replies:** 0\
**Last updated:** [April 9, 2026, 3:27pm UTC](https://discourse.slicer.org/t/orbital-wall-segmentation-and-bridging-defects/46703 "2026-04-09T15:27:12Z")

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Hi there, Pretty new to this so very much appreciate any help. I am trying to 3D print orbits, but running into issues with thin bone and holes. I am trying to use filters, wrap solidify, etc but I just cannot seem to m…

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## [Multiple organs segmentation in a MRI sequence?](https://discourse.slicer.org/t/multiple-organs-segmentation-in-a-mri-sequence/46699)

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**Author:** [@koperkill](https://discourse.slicer.org/u/koperkill)\
**Replies:** 0\
**Last updated:** [April 9, 2026, 1:36pm UTC](https://discourse.slicer.org/t/multiple-organs-segmentation-in-a-mri-sequence/46699 "2026-04-09T13:36:47Z")

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Hello, For a DCE-MRI study, I would like to extract the signal intensity, through time, for a dozen organs and regions of the upper body. I have successfully built a time sequence using my 40 volumes in time, drawn a s…

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## [Viewing / Analysing RT Plans / Fields](https://discourse.slicer.org/t/viewing-analysing-rt-plans-fields/46683)

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**Author:** [@AlexB](https://discourse.slicer.org/u/AlexB)\
**Replies:** 4\
**Last updated:** [April 9, 2026, 3:27am UTC](https://discourse.slicer.org/t/viewing-analysing-rt-plans-fields/46683 "2026-04-09T03:27:02Z")

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Greetings, dear community! First off, thanks for this project–and for actively maintaining it. Now, I’d like to know if the program would cover my use-case, namely: Visualise dose distributions (in colour-wash mode) S…

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## [Extension site not found](https://discourse.slicer.org/t/extension-site-not-found/46484)

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**Author:** [@Aram](https://discourse.slicer.org/u/Aram)\
**Replies:** 2\
**Last updated:** [April 8, 2026, 11:06am UTC](https://discourse.slicer.org/t/extension-site-not-found/46484 "2026-04-08T11:06:11Z")

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Hi. I am new to Slicer3D. The web page https://extensions.slicer.org/ is not found. So I cant install any additional modules. What should I do?

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## [CT reconstruction artifacts?](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677)

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**Author:** [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Replies:** 1\
**Last updated:** [April 7, 2026, 8:24pm UTC](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677 "2026-04-07T20:24:25Z")

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Hi, I’d like to know what is the cause of the apparent artifact on the skin seen on the sagittal view of the picture below (circled by the CC curve) Thank you very much

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## [Keep the hand-drawn segmentation after interpolation](https://discourse.slicer.org/t/keep-the-hand-drawn-segmentation-after-interpolation/46605)

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**Author:** [@mrrezaie](https://discourse.slicer.org/u/mrrezaie)\
**Replies:** 6\
**Last updated:** [April 7, 2026, 2:14pm UTC](https://discourse.slicer.org/t/keep-the-hand-drawn-segmentation-after-interpolation/46605 "2026-04-07T14:14:23Z")

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Hello all. I’m working with a non-isotropic MRI, only the sagittal view with 31 slices. More info can be found in this post: Segmentation using curves . I drew the segmentation on each slice, however, the 3D shape is not…

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## [Section thickness](https://discourse.slicer.org/t/section-thickness/46674)

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**Author:** [@sturiones](https://discourse.slicer.org/u/sturiones)\
**Replies:** 0\
**Last updated:** [April 7, 2026, 9:58am UTC](https://discourse.slicer.org/t/section-thickness/46674 "2026-04-07T09:58:25Z")

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How can I set up the slice thickness while uploading the stack of histological (light microscopy) sections?

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## [Dental segmentation error: something went wrong during nnunet processing](https://discourse.slicer.org/t/dental-segmentation-error-something-went-wrong-during-nnunet-processing/46668)

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**Author:** [@Hisham\_Bakar](https://discourse.slicer.org/u/Hisham_Bakar)\
**Replies:** 1\
**Last updated:** [April 7, 2026, 6:07am UTC](https://discourse.slicer.org/t/dental-segmentation-error-something-went-wrong-during-nnunet-processing/46668 "2026-04-07T06:07:46Z")

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what is the solution when i want to open the dental segmentation this window appears?

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## [Issue with Visualizing 3D Movie After Converting Raw DICOM to Cartesian DICOM in 3D Slice](https://discourse.slicer.org/t/issue-with-visualizing-3d-movie-after-converting-raw-dicom-to-cartesian-dicom-in-3d-slice/42074)

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**Author:** [@federica-pixel](https://discourse.slicer.org/u/federica-pixel)\
**Replies:** 7\
**Last updated:** [April 7, 2026, 1:17am UTC](https://discourse.slicer.org/t/issue-with-visualizing-3d-movie-after-converting-raw-dicom-to-cartesian-dicom-in-3d-slice/42074 "2026-04-07T01:17:43Z")

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I came across information on converting 3D TEE data from raw DICOM to Cartesian DICOM using GE software. I am currently trying to achieve this and would greatly appreciate your insights. First, I downloaded SlicerHeart …

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## [Urgent (Thesis project): Thresholding Impossible due to High Noise Levels in CT Reconstruction](https://discourse.slicer.org/t/urgent-thesis-project-thresholding-impossible-due-to-high-noise-levels-in-ct-reconstruction/46632)

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**Author:** [@Yaren\_Cetin](https://discourse.slicer.org/u/Yaren_Cetin)\
**Replies:** 4\
**Last updated:** [April 6, 2026, 4:11pm UTC](https://discourse.slicer.org/t/urgent-thesis-project-thresholding-impossible-due-to-high-noise-levels-in-ct-reconstruction/46632 "2026-04-06T16:11:19Z")

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To Whom It May Concern, I am experiencing a critical technical issue with my CT scan data that is preventing me from proceeding with my thesis analysis. The primary problem is that the Signal-to-Noise Ratio (SNR) is so…

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## [Renal Artery Segmentation: Recommendations using AVT Dataset](https://discourse.slicer.org/t/renal-artery-segmentation-recommendations-using-avt-dataset/46669)

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**Author:** [@kryspiechicken](https://discourse.slicer.org/u/kryspiechicken)\
**Replies:** 1\
**Last updated:** [April 6, 2026, 12:22pm UTC](https://discourse.slicer.org/t/renal-artery-segmentation-recommendations-using-avt-dataset/46669 "2026-04-06T12:22:37Z")

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Hey everyone! I’m just starting with Slicer3D, any recommendations for renal artery segmentations? Currently working on a BME project of comparison of endovascular paths (radial versus femoral) access to renal arteries,…

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## [3d ultrasound from GE upload in 3d slicer](https://discourse.slicer.org/t/3d-ultrasound-from-ge-upload-in-3d-slicer/44827)

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**Author:** [@mvergnat](https://discourse.slicer.org/u/mvergnat)\
**Replies:** 1\
**Last updated:** [April 6, 2026, 12:33am UTC](https://discourse.slicer.org/t/3d-ultrasound-from-ge-upload-in-3d-slicer/44827 "2026-04-06T00:33:43Z")

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Dear 3dslicer community I use slicer 5.8.1 on PC Windows 10 pro in the past, I imported 3d from Philips into slicer without problem (cartesian dicoms and then 4d philips patch in slicer…). Now we have GE datasets and…

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## [Debugging application crash](https://discourse.slicer.org/t/debugging-application-crash/46531)

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**Author:** [@sogo](https://discourse.slicer.org/u/sogo)\
**Replies:** 5\
**Last updated:** [April 5, 2026, 9:29pm UTC](https://discourse.slicer.org/t/debugging-application-crash/46531 "2026-04-05T21:29:45Z")

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I am in process of merging our organization’s SW pipeline based on top of Slicer-4.11 into Slicer-5.10. While I am able to merge and resolve merge conflicts, my application is crashing on startup. I was following the sta…

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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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## [SlicerVMTK is not being built for preview](https://discourse.slicer.org/t/slicervmtk-is-not-being-built-for-preview/46647)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 4\
**Last updated:** [April 4, 2026, 9:20am UTC](https://discourse.slicer.org/t/slicervmtk-is-not-being-built-for-preview/46647 "2026-04-04T09:20:10Z")

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SlicerVMTK fails to build on cdash since a few weeks. The reported errors hint towards an environment problem on the build machines. It builds fine on Arch. Thanks for having a look.

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## [IS Meta Quest 3 Video Passthough supported in Virtual reality module for OpenXR backend?](https://discourse.slicer.org/t/is-meta-quest-3-video-passthough-supported-in-virtual-reality-module-for-openxr-backend/46649)

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**Author:** [@kareem\_abdelaziz](https://discourse.slicer.org/u/kareem_abdelaziz)\
**Replies:** 1\
**Last updated:** [April 4, 2026, 1:42am UTC](https://discourse.slicer.org/t/is-meta-quest-3-video-passthough-supported-in-virtual-reality-module-for-openxr-backend/46649 "2026-04-04T01:42:51Z")

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hello I wanted to use Augmenteds reality for a protoype project and I want to purchase Meta Quest 3 as it the commericially avalaible supported glasses , does the Virual Reality module support the Videopass through for a…

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## [Spatial information in 2D segmentations](https://discourse.slicer.org/t/spatial-information-in-2d-segmentations/46642)

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**Author:** [@Antmaker](https://discourse.slicer.org/u/Antmaker)\
**Replies:** 5\
**Last updated:** [April 3, 2026, 9:55pm UTC](https://discourse.slicer.org/t/spatial-information-in-2d-segmentations/46642 "2026-04-03T21:55:40Z")

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According to this post, 2D segmentation is possible in 3D Slicer. I am trying to figure out whether it is possible to incorporate spatial information such that I may calculate “area” instead of “volume (Volume Statistics…

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## [Fast Model Align module not working in 3D Slicer 5.10.0](https://discourse.slicer.org/t/fast-model-align-module-not-working-in-3d-slicer-5-10-0/46645)

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**Author:** [@abhijeet2410](https://discourse.slicer.org/u/abhijeet2410)\
**Replies:** 1\
**Last updated:** [April 3, 2026, 4:02am UTC](https://discourse.slicer.org/t/fast-model-align-module-not-working-in-3d-slicer-5-10-0/46645 "2026-04-03T04:02:26Z")

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Hello Team, We installed the SlicerMorph extension successfully (it shows up in Extension Manager), but the Fast Model Align module is not working properly. When we open the module, we only see the Help & Acknowledge…

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## [Screen Capture and Screenshot export issues](https://discourse.slicer.org/t/screen-capture-and-screenshot-export-issues/46621)

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**Author:** [@Atticus](https://discourse.slicer.org/u/Atticus)\
**Replies:** 7\
**Last updated:** [April 2, 2026, 4:49pm UTC](https://discourse.slicer.org/t/screen-capture-and-screenshot-export-issues/46621 "2026-04-02T16:49:51Z")

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Hi community! I am trying to export images from 3D renders (transparent PNGs). Currently running 3DSlicer 5.10 on Win11. Issue 1: When using the Screen Capture module, if the default output file name is changed, the e…

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## [BQML to SUV (how to do automatically while loading DICOM data)](https://discourse.slicer.org/t/bqml-to-suv-how-to-do-automatically-while-loading-dicom-data/46583)

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**Author:** [@Divi](https://discourse.slicer.org/u/Divi)\
**Replies:** 4\
**Last updated:** [April 2, 2026, 2:40pm UTC](https://discourse.slicer.org/t/bqml-to-suv-how-to-do-automatically-while-loading-dicom-data/46583 "2026-04-02T14:40:48Z")

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I’m trying to do segmentation and quantification, but my values are too high (maybe its BQML) and I need it to be SUV values. Could you help me on how to do this?

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## [Freehand ultrasound in 3D Slicer: image inverted during recording](https://discourse.slicer.org/t/freehand-ultrasound-in-3d-slicer-image-inverted-during-recording/46592)

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**Author:** [@daandevlieger2-alt](https://discourse.slicer.org/u/daandevlieger2-alt)\
**Replies:** 3\
**Last updated:** [April 2, 2026, 1:43pm UTC](https://discourse.slicer.org/t/freehand-ultrasound-in-3d-slicer-image-inverted-during-recording/46592 "2026-04-02T13:43:09Z")

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Hi everyone, I’m using 3D Slicer (version 5.8.1) together with an OptiTrack V120 Trio and the PLUS/ArtUS setup for 3D freehand ultrasound. I’m encountering an issue where, during acquisition, the ultrasound image is st…

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## [I can not open saved files/ GPA](https://discourse.slicer.org/t/i-can-not-open-saved-files-gpa/46504)

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**Author:** [@Saaalz](https://discourse.slicer.org/u/Saaalz)\
**Replies:** 2\
**Last updated:** [April 2, 2026, 8:18am UTC](https://discourse.slicer.org/t/i-can-not-open-saved-files-gpa/46504 "2026-04-02T08:18:39Z")

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Please, I don’t know why I can’t open saved file/ 3D slicer / GPA, saved data is there and has size, however, when I try to open give me the following message. I just started using the Slicer few weeks ago only. Thank yo…

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