# Top

**URL:** https://discourse.slicer.org/top.md?page=7

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

**Page:** 8

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## [Importing dcm files to 3D slicer](https://discourse.slicer.org/t/importing-dcm-files-to-3d-slicer/45843)

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**Author:** [@Reza\_Golshani](https://discourse.slicer.org/u/Reza_Golshani)\
**Replies:** 3\
**Last updated:** [January 25, 2026, 11:37am UTC](https://discourse.slicer.org/t/importing-dcm-files-to-3d-slicer/45843 "2026-01-25T11:37:44Z")

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My app can’t see dcm files to make me able to import them. Importing data - finding folder - select folder then no included file and anything dose not imported

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## [Please advise - Slicer wiped older dicoms/segmentations when editing other files ](https://discourse.slicer.org/t/please-advise-slicer-wiped-older-dicoms-segmentations-when-editing-other-files/45349)

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**Author:** [@Sus\_Mu](https://discourse.slicer.org/u/Sus_Mu)\
**Replies:** 3\
**Last updated:** [December 5, 2025, 12:05am UTC](https://discourse.slicer.org/t/please-advise-slicer-wiped-older-dicoms-segmentations-when-editing-other-files/45349 "2025-12-05T00:05:52Z")

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I am working on a project with batches of segmentations. Batch A (prepared in October) and Batch B (prepared in November) were saved on my computer, without meaningful backup through TimeMachine or iCloud. I also have a…

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## [DeCAL troubleshooting (3DSlicer versions 5.9 & 5.10)](https://discourse.slicer.org/t/decal-troubleshooting-3dslicer-versions-5-9-5-10/45791)

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**Author:** [@katrust](https://discourse.slicer.org/u/katrust)\
**Replies:** 4\
**Last updated:** [January 20, 2026, 10:34pm UTC](https://discourse.slicer.org/t/decal-troubleshooting-3dslicer-versions-5-9-5-10/45791 "2026-01-20T22:34:05Z")

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I have been using the DeCAL extension via SlicerMorph since it’s earliest versions, and I have produced DeCAL output of evenly spaced semi-landmarks across all the models in my sample (in my case, these models are severa…

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## [3D slicer bogs down and crashes when upscaling segmentation geometry](https://discourse.slicer.org/t/3d-slicer-bogs-down-and-crashes-when-upscaling-segmentation-geometry/45240)

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**Author:** [@msoum](https://discourse.slicer.org/u/msoum)\
**Replies:** 4\
**Last updated:** [November 26, 2025, 7:34pm UTC](https://discourse.slicer.org/t/3d-slicer-bogs-down-and-crashes-when-upscaling-segmentation-geometry/45240 "2025-11-26T19:34:07Z")

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Hi all, I’m new to 3D Slicer, I’m trying to create a high fidelity model of my own post-craniotomy skull and currently in the process of trying to eliminate “stepping” on the model by trying to use the segmentation geom…

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## [How to convert a 4x4 matrix to inter-bone kinematic parameters](https://discourse.slicer.org/t/how-to-convert-a-4x4-matrix-to-inter-bone-kinematic-parameters/46986)

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**Author:** [@HHH](https://discourse.slicer.org/u/HHH)\
**Replies:** 3\
**Last updated:** [May 28, 2026, 1:59pm UTC](https://discourse.slicer.org/t/how-to-convert-a-4x4-matrix-to-inter-bone-kinematic-parameters/46986 "2026-05-28T13:59:11Z")

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Hello everyone, I am working on a knee joint registration project. According to the experience of predecessors, I have obtained a 4x4 matrix, but I am unable to calculate the kinematics of the knee joint. I am seeking he…

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## [Removal of Lightbox Mode](https://discourse.slicer.org/t/removal-of-lightbox-mode/45227)

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**Author:** [@dokay1](https://discourse.slicer.org/u/dokay1)\
**Replies:** 3\
**Last updated:** [December 21, 2025, 8:20pm UTC](https://discourse.slicer.org/t/removal-of-lightbox-mode/45227 "2025-12-21T20:20:00Z")

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I’ve just installed Version 5.10.0 to realize that Lightbox view was removed. While I understand that many don’t use it, it was the single most helpful image review setting. It allows one to review and compare thick sli…

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## [Division of the brain into individual parts](https://discourse.slicer.org/t/division-of-the-brain-into-individual-parts/47214)

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**Author:** [@Tedy](https://discourse.slicer.org/u/Tedy)\
**Replies:** 2\
**Last updated:** [June 2, 2026, 7:24pm UTC](https://discourse.slicer.org/t/division-of-the-brain-into-individual-parts/47214 "2026-06-02T19:24:37Z")

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Hi, can someone please help me cut out the brain parts from an MRI? I had a brain tumor and I want to make 3D models of the parts of my brain that were compressed by the tumor. It will help me come to terms with the dia…

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## [Can tumor volume be accurately measured?](https://discourse.slicer.org/t/can-tumor-volume-be-accurately-measured/45593)

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**Author:** [@jung](https://discourse.slicer.org/u/jung)\
**Replies:** 2\
**Last updated:** [January 7, 2026, 3:11am UTC](https://discourse.slicer.org/t/can-tumor-volume-be-accurately-measured/45593 "2026-01-07T03:11:57Z")

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Can tumor volume be accurately measure? on CT or MRI for medical and research purposes, even in anatomically complex regions such as sinonasal cancers?

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## [Severe 3D Rendering Slowdown with Many Segmentation Nodes — Can Slicer Offload Work from GPU to CPU?](https://discourse.slicer.org/t/severe-3d-rendering-slowdown-with-many-segmentation-nodes-can-slicer-offload-work-from-gpu-to-cpu/45432)

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**Author:** [@Victor\_Wayne](https://discourse.slicer.org/u/Victor_Wayne)\
**Replies:** 2\
**Last updated:** [December 18, 2025, 4:05am UTC](https://discourse.slicer.org/t/severe-3d-rendering-slowdown-with-many-segmentation-nodes-can-slicer-offload-work-from-gpu-to-cpu/45432 "2025-12-18T04:05:20Z")

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Hello, In my 3D slicer extenstion the frame rate of the 3D volume renderer drops significantly as I add more and more segmentation node. As the segmentation nodes increas even the UI becomes very very slow. When testing…

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## [2026.03.24 Weekly Meeting](https://discourse.slicer.org/t/2026-03-24-weekly-meeting/46543)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 3\
**Last updated:** [March 24, 2026, 3:48pm UTC](https://discourse.slicer.org/t/2026-03-24-weekly-meeting/46543 "2026-03-24T15:48:32Z")

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Tomorrow, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread to …

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## [How to merge two views from different DICOMs?](https://discourse.slicer.org/t/how-to-merge-two-views-from-different-dicoms/46061)

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**Author:** [@mrrezaie](https://discourse.slicer.org/u/mrrezaie)\
**Replies:** 2\
**Last updated:** [February 5, 2026, 10:58am UTC](https://discourse.slicer.org/t/how-to-merge-two-views-from-different-dicoms/46061 "2026-02-05T10:58:16Z")

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Hello, I have two DICOMs (EOS bi-plane x-ray); they are orthogonal and synchronized. The program failed to load them as series, I imported each one separately as a volume. Now, I want to merge them, but only one view of…

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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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## [Calculating difference in dose between two CT scans](https://discourse.slicer.org/t/calculating-difference-in-dose-between-two-ct-scans/46047)

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**Author:** [@hanginghats](https://discourse.slicer.org/u/hanginghats)\
**Replies:** 3\
**Last updated:** [February 14, 2026, 5:11am UTC](https://discourse.slicer.org/t/calculating-difference-in-dose-between-two-ct-scans/46047 "2026-02-14T05:11:02Z")

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I’m doing a project which requires me to analyse the difference in dose between two identical CT scans reconstructed with different algorithms. Is there any way for me to do this with slicer and slicerRT?

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## [Linear Measurements on CT scans using Ruler tool](https://discourse.slicer.org/t/linear-measurements-on-ct-scans-using-ruler-tool/46586)

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**Author:** [@egrady](https://discourse.slicer.org/u/egrady)\
**Replies:** 4\
**Last updated:** [March 26, 2026, 7:41pm UTC](https://discourse.slicer.org/t/linear-measurements-on-ct-scans-using-ruler-tool/46586 "2026-03-26T19:41:30Z")

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Hello! I am exploring using 3D slicer for my dissertation. I am using CT (dicom) files of several bovid mandibles and need to take a linear measurement of tooth crown height. It seems like the best way to do this is usi…

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## [Fail to Compute Results using TotalSegmentator (returned non-zero exist status 1)](https://discourse.slicer.org/t/fail-to-compute-results-using-totalsegmentator-returned-non-zero-exist-status-1/47404)

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**Author:** [@qn\_Huynh](https://discourse.slicer.org/u/qn_Huynh)\
**Replies:** 2\
**Last updated:** [July 18, 2026, 2:38am UTC](https://discourse.slicer.org/t/fail-to-compute-results-using-totalsegmentator-returned-non-zero-exist-status-1/47404 "2026-07-18T02:38:40Z")

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Hello Slicer Support! I have been trying to run TotalSegmentator, but it has been failing. The Slicer Error message that I have been receiving states, “… returned non-zero exit status 1.” Traceback (most recent call la…

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## [Mitral valve segmentation : echo or CT-scan?](https://discourse.slicer.org/t/mitral-valve-segmentation-echo-or-ct-scan/48173)

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**Author:** [@Giueva](https://discourse.slicer.org/u/Giueva)\
**Replies:** 2\
**Last updated:** [September 21, 2026, 1:32am UTC](https://discourse.slicer.org/t/mitral-valve-segmentation-echo-or-ct-scan/48173 "2026-09-21T01:32:32Z")

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Hello everyone, i am starting to use SlicerHeart from 3D Slicer. I want to segment the open and closed mitral valve (annulus, mitral leaflet, cordae and papillary muscle). I taught the best was from 3D echo images, but i…

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## [Using getImageCropped function in PyAutoscoper. Getting truncated/empty data](https://discourse.slicer.org/t/using-getimagecropped-function-in-pyautoscoper-getting-truncated-empty-data/46471)

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**Author:** [@Prabhroop\_Singh](https://discourse.slicer.org/u/Prabhroop_Singh)\
**Replies:** 3\
**Last updated:** [April 3, 2026, 7:28pm UTC](https://discourse.slicer.org/t/using-getimagecropped-function-in-pyautoscoper-getting-truncated-empty-data/46471 "2026-04-03T19:28:21Z")

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I’m trying to use getImageCropped from PyAutoscoper to extract the cropped DRR image of a volume at a given pose. My setup works fine otherwise – getPose, getNCC, optimizeFrame, and trackingDialog all work correctly. Thi…

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## [Extension Manager does not launch on Win 11 (Slicer 5.12.3)](https://discourse.slicer.org/t/extension-manager-does-not-launch-on-win-11-slicer-5-12-3/47935)

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**Author:** [@dumichgh](https://discourse.slicer.org/u/dumichgh)\
**Replies:** 3\
**Last updated:** [August 24, 2026, 12:37pm UTC](https://discourse.slicer.org/t/extension-manager-does-not-launch-on-win-11-slicer-5-12-3/47935 "2026-08-24T12:37:25Z")

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Problem report for 3D Slicer 5.12.3 win-amd64: \[please describe expected and actual behavior\] Extension manager does not launch on Windows 11 system after 30min Log: \[DEBUG\]\[Qt\] 19.08.2026 17:14:18 \[\] (unknown:0) - S…

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## [How Does Slicer Handle Image Scaling in Image-to-probe Calibration?](https://discourse.slicer.org/t/how-does-slicer-handle-image-scaling-in-image-to-probe-calibration/46368)

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**Author:** [@daandevlieger2-alt](https://discourse.slicer.org/u/daandevlieger2-alt)\
**Replies:** 3\
**Last updated:** [March 5, 2026, 1:09pm UTC](https://discourse.slicer.org/t/how-does-slicer-handle-image-scaling-in-image-to-probe-calibration/46368 "2026-03-05T13:09:19Z")

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Hi everyone, We are working with 3D Slicer (version 5.8.1), an OptiTrack V120:Trio, and an Telemed ArtUs for 3D freehand ultrasound acquisition. We have repeatedly attempted probe calibration using a stylus-based appro…

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## [How to overlay pre- and post-operative dental DICOM files to measure bone gain ?](https://discourse.slicer.org/t/how-to-overlay-pre-and-post-operative-dental-dicom-files-to-measure-bone-gain/46099)

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**Author:** [@Sont](https://discourse.slicer.org/u/Sont)\
**Replies:** 3\
**Last updated:** [February 10, 2026, 12:50pm UTC](https://discourse.slicer.org/t/how-to-overlay-pre-and-post-operative-dental-dicom-files-to-measure-bone-gain/46099 "2026-02-10T12:50:25Z")

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Hello, I would like to overlay two dental DICOM files (pre-operative and post-operative) following a bone graft in order to measure the volumetric bone gain (in mm and/or %). To perform these measurements, I would need …

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## [Pelvic screw planification ](https://discourse.slicer.org/t/pelvic-screw-planification/47578)

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**Author:** [@Emile\_Vandromme](https://discourse.slicer.org/u/Emile_Vandromme)\
**Replies:** 2\
**Last updated:** [July 8, 2026, 3:46pm UTC](https://discourse.slicer.org/t/pelvic-screw-planification/47578 "2026-07-08T15:46:40Z")

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Hi everyone, I’m an orthopedic trauma surgeon and I’m currently trying to use 3D Slicer for preoperative planning of trans-sacral and sacroiliac screw fixation. I’m looking for a way to simulate the screw trajectory di…

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## [2026.03.02 Weekly Meeting](https://discourse.slicer.org/t/2026-03-02-weekly-meeting/46362)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 3\
**Last updated:** [March 3, 2026, 9:00pm UTC](https://discourse.slicer.org/t/2026-03-02-weekly-meeting/46362 "2026-03-03T21:00:35Z")

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Tomorrow, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread to …

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## [2026.02.24 Weekly Meeting](https://discourse.slicer.org/t/2026-02-24-weekly-meeting/46266)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 3\
**Last updated:** [February 24, 2026, 5:33pm UTC](https://discourse.slicer.org/t/2026-02-24-weekly-meeting/46266 "2026-02-24T17:33:52Z")

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Tomorrow, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: https://bit.ly/slicer-googlemeet-hosted-by-kitware Agenda: Please post to this thread to …

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## [Segmenting cortical and cancellous bone from spinal ct scan](https://discourse.slicer.org/t/segmenting-cortical-and-cancellous-bone-from-spinal-ct-scan/46001)

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**Author:** [@Jamielynn\_Lu](https://discourse.slicer.org/u/Jamielynn_Lu)\
**Replies:** 3\
**Last updated:** [January 31, 2026, 12:21pm UTC](https://discourse.slicer.org/t/segmenting-cortical-and-cancellous-bone-from-spinal-ct-scan/46001 "2026-01-31T12:21:23Z")

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Hello I am trying to find the best way to differentiate between cancellous and cortical bone in my vertebrae for a FEA. I am having a hard time thresholding to create the different bone textures as my scan isn’t the best…

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## [CT/CBCT reconstruction](https://discourse.slicer.org/t/ct-cbct-reconstruction/45032)

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**Author:** [@Hussam](https://discourse.slicer.org/u/Hussam)\
**Replies:** 2\
**Last updated:** [November 11, 2025, 2:03pm UTC](https://discourse.slicer.org/t/ct-cbct-reconstruction/45032 "2025-11-11T14:03:06Z")

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Dear Sir or Madam, Do you mind me asking whether 3 D slicer can reconstruct CT/CBCT? Yours sincerely

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## [Grow from seed error — exceeded max number of voxels](https://discourse.slicer.org/t/grow-from-seed-error-exceeded-max-number-of-voxels/46371)

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**Author:** [@Antmaker](https://discourse.slicer.org/u/Antmaker)\
**Replies:** 2\
**Last updated:** [March 4, 2026, 12:16pm UTC](https://discourse.slicer.org/t/grow-from-seed-error-exceeded-max-number-of-voxels/46371 "2026-03-04T12:16:03Z")

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I was trying to use the grow-from-seed effect in the Segment Editor module and keep encountering this error. At first I thought this was due to not having enough RAM, thus I’ve increased my system’s memory from 195GB to…

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## [2026.05.05 Weekly Meeting](https://discourse.slicer.org/t/2026-05-05-weekly-meeting/46871)

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**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 3\
**Last updated:** [May 6, 2026, 1:42am UTC](https://discourse.slicer.org/t/2026-05-05-weekly-meeting/46871 "2026-05-06T01:42:36Z")

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Title: 2026.05.05 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET. Anyone is welcome to join at this link: Launch Meeting - Zoom Agenda: Please post to this t…

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## [Multiple Segments into 1 3D print](https://discourse.slicer.org/t/multiple-segments-into-1-3d-print/46771)

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**Author:** [@Riley\_Maurath](https://discourse.slicer.org/u/Riley_Maurath)\
**Replies:** 1\
**Last updated:** [April 18, 2026, 12:11am UTC](https://discourse.slicer.org/t/multiple-segments-into-1-3d-print/46771 "2026-04-18T00:11:25Z")

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I currently have 3 segments created in the 3D slicer and I am wanting to export them to be 3D printed. The issue I am running into are that the models are inside of each other and I am wanting to print them inside of eac…

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## [ADC images Quantifications ](https://discourse.slicer.org/t/adc-images-quantifications/46074)

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**Author:** [@a.altairan](https://discourse.slicer.org/u/a.altairan)\
**Replies:** 3\
**Last updated:** [February 9, 2026, 11:08pm UTC](https://discourse.slicer.org/t/adc-images-quantifications/46074 "2026-02-09T23:08:52Z")

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hello everyone I’m doing study involving Lumber spine, I’m trying to calculate the ADC mean and median values but I’m getting values with ( - ), how to overcome this issue ?

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## [Decrease file sizes](https://discourse.slicer.org/t/decrease-file-sizes/47224)

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**Author:** [@FabricioFO](https://discourse.slicer.org/u/FabricioFO)\
**Replies:** 2\
**Last updated:** [June 4, 2026, 12:21am UTC](https://discourse.slicer.org/t/decrease-file-sizes/47224 "2026-06-04T00:21:52Z")

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Hello, everyone. I’m trying to upload my ctscans, but the filles are really big, the resolution is too high. I wanna know how do you solve this kind of problem, How do you reduce file sizes without losing quality?

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## [3D Slicer crashes when using the Smoother during segmentation](https://discourse.slicer.org/t/3d-slicer-crashes-when-using-the-smoother-during-segmentation/47193)

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**Author:** [@Camilla](https://discourse.slicer.org/u/Camilla)\
**Replies:** 2\
**Last updated:** [June 2, 2026, 2:09am UTC](https://discourse.slicer.org/t/3d-slicer-crashes-when-using-the-smoother-during-segmentation/47193 "2026-06-02T02:09:19Z")

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3D Slicer crashes when using the Smoother during segmentation. The program is ‘thinking’ for a really long time and ultimately end up not responding and I have to start over. Any suggestions on why that happens? I’m t…

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## [Problem with TotalSegmentator - my computer freezes](https://discourse.slicer.org/t/problem-with-totalsegmentator-my-computer-freezes/46068)

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**Author:** [@jimenagonzalezsal](https://discourse.slicer.org/u/jimenagonzalezsal)\
**Replies:** 2\
**Last updated:** [February 15, 2026, 2:08pm UTC](https://discourse.slicer.org/t/problem-with-totalsegmentator-my-computer-freezes/46068 "2026-02-15T14:08:29Z")

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Hello! I need help. I’m trying to segment lumbar spine DICOMs, but whenever I click Apply, my computer freezes and the segmentation never finishes.

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## [Interaction Box for Transforms](https://discourse.slicer.org/t/interaction-box-for-transforms/45436)

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**Author:** [@Jane\_Hand](https://discourse.slicer.org/u/Jane_Hand)\
**Replies:** 2\
**Last updated:** [December 11, 2025, 1:57pm UTC](https://discourse.slicer.org/t/interaction-box-for-transforms/45436 "2025-12-11T13:57:54Z")

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I can’t figure out how to made my interaction display a box to more easily manipulate my models. I updated to 5.10. While I am able to move my models with the object on the screen, it only allows for local manipulatio…

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## [Error when running watershed](https://discourse.slicer.org/t/error-when-running-watershed/48557)

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**Author:** [@jsguerra](https://discourse.slicer.org/u/jsguerra)\
**Replies:** 3\
**Last updated:** [October 29, 2026, 2:12pm UTC](https://discourse.slicer.org/t/error-when-running-watershed/48557 "2026-10-29T14:12:53Z")

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I’m trying to use watershed segmentation (5.12.4 on Win10) and I get a segmentation fail message. This is what I get on detials: Traceback (most recent call last): File “C:\\Users/JSG/AppData/Local/slicer.org/3D Slicer…

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## [2026.11.10 Weekly Meeting](https://discourse.slicer.org/t/2026-11-10-weekly-meeting/48706)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 2\
**Last updated:** [November 4, 2026, 5:42pm UTC](https://discourse.slicer.org/t/2026-11-10-weekly-meeting/48706 "2026-11-04T17:42:32Z")

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Title: 2026.11.10 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · November 10, 2026 10:00 AM (Ameri…

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## [Error In total Segmentor macOS ](https://discourse.slicer.org/t/error-in-total-segmentor-macos/47021)

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**Author:** [@Gabriel.LA](https://discourse.slicer.org/u/Gabriel.LA)\
**Replies:** 1\
**Last updated:** [May 14, 2026, 6:41am UTC](https://discourse.slicer.org/t/error-in-total-segmentor-macos/47021 "2026-05-14T06:41:56Z")

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Command ‘\[’/Applications/Slicer.app/Contents/bin/../bin/PythonSlicer’, ‘/Applications/Slicer.app/Contents/lib/Python/bin/TotalSegmentator’, ‘-i’, ‘/private/var/folders/3n/nb74wlx17txbbdx1b3cjlwym0000gn/T/Slicer-gabriellu…

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## [Segmentations Module - Opacity Issue](https://discourse.slicer.org/t/segmentations-module-opacity-issue/48044)

<div class="topic-metadata">

**Author:** [@Malaquias\_Cerrillo](https://discourse.slicer.org/u/Malaquias_Cerrillo)\
**Replies:** 2\
**Last updated:** [September 3, 2026, 5:15pm UTC](https://discourse.slicer.org/t/segmentations-module-opacity-issue/48044 "2026-09-03T17:15:34Z")

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Hi everybody, i’m experiencing some trouble in the latest version 5.12.3 trying to shift the opacity of the different segmentations. However, I can shift the overall opacity of de segmentation node, does this happens to …

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## [2026.06.16 Weekly Meeting](https://discourse.slicer.org/t/2026-06-16-weekly-meeting/47301)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 2\
**Last updated:** [June 16, 2026, 4:23pm UTC](https://discourse.slicer.org/t/2026-06-16-weekly-meeting/47301 "2026-06-16T16:23:11Z")

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Title: 2026.06.16 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET. Anyone is welcome to join at this link: Launch Meeting - Zoom Agenda: Please post to this t…

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## [Clarification on L3 SMA calculations and Pixel Spacing](https://discourse.slicer.org/t/clarification-on-l3-sma-calculations-and-pixel-spacing/47219)

<div class="topic-metadata">

**Author:** [@merckins](https://discourse.slicer.org/u/merckins)\
**Replies:** 2\
**Last updated:** [June 4, 2026, 7:31am UTC](https://discourse.slicer.org/t/clarification-on-l3-sma-calculations-and-pixel-spacing/47219 "2026-06-04T07:31:29Z")

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Hello, I’m working on calculating CT L3 SMA, but some aspects are still unclear to me. I may be overlooking something, so I would really appreciate any feedback. I have original CT volumes with differing pixel spacings…

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## [2026.06.09 Weekly Meeting](https://discourse.slicer.org/t/2026-06-09-weekly-meeting/47221)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 3\
**Last updated:** [June 9, 2026, 2:15pm UTC](https://discourse.slicer.org/t/2026-06-09-weekly-meeting/47221 "2026-06-09T14:15:03Z")

</div>

Title: 2026.06.09 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET. Anyone is welcome to join at (this link: Launch Meeting - Zoom) this new link for today: Launch…

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## [issues with Elastix tool](https://discourse.slicer.org/t/issues-with-elastix-tool/46213)

<div class="topic-metadata">

**Author:** [@Martina\_Ma](https://discourse.slicer.org/u/Martina_Ma)\
**Replies:** 3\
**Last updated:** [February 20, 2026, 9:48am UTC](https://discourse.slicer.org/t/issues-with-elastix-tool/46213 "2026-02-20T09:48:55Z")

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Operating system: Windows 11 PRO Slicer version: 5.10.0 Hi everyone, I’m trying to use Elastix tool to register a CT scan with a CBCT one but the tool doesn’t work anymore and gives error. I already resampled the volu…

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## [Landmark to .ply misalignment when reloaded for editing](https://discourse.slicer.org/t/landmark-to-ply-misalignment-when-reloaded-for-editing/45995)

<div class="topic-metadata">

**Author:** [@emmm\_m](https://discourse.slicer.org/u/emmm_m)\
**Replies:** 5\
**Last updated:** [January 30, 2026, 3:38am UTC](https://discourse.slicer.org/t/landmark-to-ply-misalignment-when-reloaded-for-editing/45995 "2026-01-30T03:38:48Z")

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When I reload a saved markup file to it’s original .ply file to adjust a point which was incorrectly placed, the points appear entirely offset from the orientation of the scan. It appears as though the points are at abou…

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## [Suggestions on best workaround for poor data set](https://discourse.slicer.org/t/suggestions-on-best-workaround-for-poor-data-set/46050)

<div class="topic-metadata">

**Author:** [@Learn34](https://discourse.slicer.org/u/Learn34)\
**Replies:** 3\
**Last updated:** [February 24, 2026, 2:01am UTC](https://discourse.slicer.org/t/suggestions-on-best-workaround-for-poor-data-set/46050 "2026-02-24T02:01:46Z")

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While I’m now attempting to follow the workflow described in this paper, I’m still stymied by the poor fitness of my baseline dataset (a SPECT of my spine) for segmentation of soft tissue (or it may be a limitation of th…

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## [2026.09.15 Weekly Meeting](https://discourse.slicer.org/t/2026-09-15-weekly-meeting/48107)

<div class="topic-metadata">

**Author:** [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Replies:** 2\
**Last updated:** [September 15, 2026, 3:30pm UTC](https://discourse.slicer.org/t/2026-09-15-weekly-meeting/48107 "2026-09-15T15:30:48Z")

</div>

Title: 2026.09.15 Weekly Meeting Next Tuesday, we will be having our next weekly hangout at 10:00 AM ET until 11:00 AM ET. Anyone is welcome to join at this link: Google Meet meeting 📅 Weekly Meeting · September 15, …

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## [Pyradiomics GLRLM crashing at native 100um resolution vs 250um](https://discourse.slicer.org/t/pyradiomics-glrlm-crashing-at-native-100um-resolution-vs-250um/47500)

<div class="topic-metadata">

**Author:** [@oviya](https://discourse.slicer.org/u/oviya)\
**Replies:** 2\
**Last updated:** [June 29, 2026, 7:25pm UTC](https://discourse.slicer.org/t/pyradiomics-glrlm-crashing-at-native-100um-resolution-vs-250um/47500 "2026-06-29T19:25:43Z")

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Hello everyone! My name is Oviya, I’m an undergrad hoping to get a bit of help. I have been trying extract features from MRI images via a compute cluster, and have been successful with downsampled (250um) images (41MB).…

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## [Developing a vessel analysis module for 3D Slicer – guidance needed](https://discourse.slicer.org/t/developing-a-vessel-analysis-module-for-3d-slicer-guidance-needed/46762)

<div class="topic-metadata">

**Author:** [@Benny\_Zamir](https://discourse.slicer.org/u/Benny_Zamir)\
**Replies:** 2\
**Last updated:** [April 18, 2026, 12:34am UTC](https://discourse.slicer.org/t/developing-a-vessel-analysis-module-for-3d-slicer-guidance-needed/46762 "2026-04-18T00:34:24Z")

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Hi, I’ve been working on a Python-based vessel analysis tool and uploaded it here: https://github.com/bz1977/VesselAnalyzer Current status: Branch segmentation and marker placement still need improvement Lesion …

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## [Crop segmentations with bounding box](https://discourse.slicer.org/t/crop-segmentations-with-bounding-box/47535)

<div class="topic-metadata">

**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 2\
**Last updated:** [July 7, 2026, 2:40am UTC](https://discourse.slicer.org/t/crop-segmentations-with-bounding-box/47535 "2026-07-07T02:40:07Z")

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Are there any tools for cropping segments as readily as volumes? Ideally, similar to volume cropping, I’d like to render my segments in 3D and adjust a bounding box where all segment labels outside are deleted. Thanks

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## [Color display error on 3D Volume](https://discourse.slicer.org/t/color-display-error-on-3d-volume/46390)

<div class="topic-metadata">

**Author:** [@Karuruychi](https://discourse.slicer.org/u/Karuruychi)\
**Replies:** 2\
**Last updated:** [March 9, 2026, 3:35am UTC](https://discourse.slicer.org/t/color-display-error-on-3d-volume/46390 "2026-03-09T03:35:56Z")

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Hello everyone I’m developing an application based on Trame-Slicer, specifically a 3D ROI Cropping feature. Trame-Slicer already supports displaying the ROI box, but when I enable it, my 3D block displays incorrect colo…

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## [Slicer ANTs Registration Failing](https://discourse.slicer.org/t/slicer-ants-registration-failing/45373)

<div class="topic-metadata">

**Author:** [@ThomasVanParys](https://discourse.slicer.org/u/ThomasVanParys)\
**Replies:** 2\
**Last updated:** [December 8, 2025, 8:25pm UTC](https://discourse.slicer.org/t/slicer-ants-registration-failing/45373 "2025-12-08T20:25:43Z")

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Hello! I have tried to register two nrrd. volumes in ‘G:\\Kikopey\_project\\ANTs\_Volumes’ But I have come across this issue, and don’t fully undertsnad how to resolve it: Python 3.12.10 (main, Nov 10 2025, 02:47:38) \[MSC …

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## [Plan-Cut on segment's labelmap](https://discourse.slicer.org/t/plan-cut-on-segments-labelmap/45727)

<div class="topic-metadata">

**Author:** [@shanfl](https://discourse.slicer.org/u/shanfl)\
**Replies:** 4\
**Last updated:** [January 13, 2026, 9:33pm UTC](https://discourse.slicer.org/t/plan-cut-on-segments-labelmap/45727 "2026-01-13T21:33:03Z")

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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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