# Latest

**URL:** https://discourse.slicer.org/latest.md?page=26

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

**Page:** 27

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## [I can't remove the slice visibility in my 3d views...](https://discourse.slicer.org/t/i-cant-remove-the-slice-visibility-in-my-3d-views/45725)

<div class="topic-metadata">

**Author:** [@Nednao](https://discourse.slicer.org/u/Nednao)\
**Replies:** 4\
**Last updated:** [January 10, 2026, 4:49pm UTC](https://discourse.slicer.org/t/i-cant-remove-the-slice-visibility-in-my-3d-views/45725 "2026-01-10T16:49:39Z")

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Hi everyone, I hope you’re all doing well. I have a small problem in my 3D view. There is an orange outline displaying the Dorso-Ventral slice visibility of my specimen. I know that I can enable this kind of option by c…

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## [What are the denoising algorithms used to denoise forward projection X-rays in Slicer](https://discourse.slicer.org/t/what-are-the-denoising-algorithms-used-to-denoise-forward-projection-x-rays-in-slicer/45726)

<div class="topic-metadata">

**Author:** [@Idris\_Sunmola](https://discourse.slicer.org/u/Idris_Sunmola)\
**Replies:** 0\
**Last updated:** [January 9, 2026, 8:44pm UTC](https://discourse.slicer.org/t/what-are-the-denoising-algorithms-used-to-denoise-forward-projection-x-rays-in-slicer/45726 "2026-01-09T20:44:47Z")

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I would like to know which analytical and/or deep learning algorithms Slicer uses to denoise the forward projection X-rays (also known as sinograms). These X-rays exhibit a host of noise profiles, such as beam hardening,…

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## [Registration Open: IST Winter School 2026 (Hands-on Tractography) – Verona, Italy](https://discourse.slicer.org/t/registration-open-ist-winter-school-2026-hands-on-tractography-verona-italy/45722)

<div class="topic-metadata">

**Author:** [@Graham\_Little](https://discourse.slicer.org/u/Graham_Little)\
**Replies:** 0\
**Last updated:** [January 9, 2026, 8:43pm UTC](https://discourse.slicer.org/t/registration-open-ist-winter-school-2026-hands-on-tractography-verona-italy/45722 "2026-01-09T20:43:05Z")

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Dear colleagues, We are pleased to announce that registration is now open for the IST Winter School 2026, organized by the International Society for Tractography. Dates: February 24–27, 2026 Location: University of Ver…

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## [Convert RTStruct to DICOM SEG](https://discourse.slicer.org/t/convert-rtstruct-to-dicom-seg/45657)

<div class="topic-metadata">

**Author:** [@SaraROMarques](https://discourse.slicer.org/u/SaraROMarques)\
**Replies:** 1\
**Last updated:** [January 9, 2026, 2:48pm UTC](https://discourse.slicer.org/t/convert-rtstruct-to-dicom-seg/45657 "2026-01-09T14:48:09Z")

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Hello, how can I convert RTStruct to DICOM Seg? I’m having some difficulties…

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## [Slicer Heart documentation](https://discourse.slicer.org/t/slicer-heart-documentation/45660)

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**Author:** [@PaoloZaffino](https://discourse.slicer.org/u/PaoloZaffino)\
**Replies:** 6\
**Last updated:** [January 9, 2026, 3:42am UTC](https://discourse.slicer.org/t/slicer-heart-documentation/45660 "2026-01-09T03:42:03Z")

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Hi all, thank you very much for the SlicerHeart extension! I was wondering if, in addition to the links on the official github page, there is some additional guide/tutorial on how to use the extension. Best, Paolo

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## [Optimal C-arm angulation along a plane from CT](https://discourse.slicer.org/t/optimal-c-arm-angulation-along-a-plane-from-ct/37200)

<div class="topic-metadata">

**Author:** [@Miguel\_Nobre\_Menezes](https://discourse.slicer.org/u/Miguel_Nobre_Menezes)\
**Replies:** 13\
**Last updated:** [January 8, 2026, 1:50pm UTC](https://discourse.slicer.org/t/optimal-c-arm-angulation-along-a-plane-from-ct/37200 "2026-01-08T13:50:39Z")

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Hi there. I’m an Interventional Cardiologist looking to use 3D Slicer for planning interventions based on CT. Current state of the art software (3mensio) enables C-arm rotation angles along a plane, thereby displaying a …

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## [Applying B-spline Transform to RTDose/RTStructre](https://discourse.slicer.org/t/applying-b-spline-transform-to-rtdose-rtstructre/44482)

<div class="topic-metadata">

**Author:** [@azam](https://discourse.slicer.org/u/azam)\
**Replies:** 3\
**Last updated:** [January 8, 2026, 11:59am UTC](https://discourse.slicer.org/t/applying-b-spline-transform-to-rtdose-rtstructre/44482 "2026-01-08T11:59:47Z")

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Hello everyone, I am working on registering two CT images of the pelvic region, which often exhibit significant anatomical changes, especially in organs like the bladder. I have performed a B-spline registration using …

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## [Crash since SimpleITK is a python wheel](https://discourse.slicer.org/t/crash-since-simpleitk-is-a-python-wheel/45696)

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**Author:** [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Replies:** 2\
**Last updated:** [January 7, 2026, 10:19am UTC](https://discourse.slicer.org/t/crash-since-simpleitk-is-a-python-wheel/45696 "2026-01-07T10:19:08Z")

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This line simply crashes Slicer since SimpleITK is no longer built: import SimpleITK as sitk Selecting the Filters/Simple filters menu item also crashes Slicer. How can these troubles be solved? Using 5.11.0-2026-01-…

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

<div class="topic-metadata">

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

<div class="topic-metadata">

**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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## [General Registration (BRAINS) consistently reports the error “All samples map outside the moving image buffer,” even when the same image is used for both the fixed and moving volumes for a specific image](https://discourse.slicer.org/t/general-registration-brains-consistently-reports-the-error-all-samples-map-outside-the-moving-image-buffer-even-when-the-same-image-is-used-for-both-the-fixed-and-moving-volumes-for-a-specific-image/45677)

<div class="topic-metadata">

**Author:** [@ffr](https://discourse.slicer.org/u/ffr)\
**Replies:** 2\
**Last updated:** [January 6, 2026, 9:34pm UTC](https://discourse.slicer.org/t/general-registration-brains-consistently-reports-the-error-all-samples-map-outside-the-moving-image-buffer-even-when-the-same-image-is-used-for-both-the-fixed-and-moving-volumes-for-a-specific-image/45677 "2026-01-06T21:34:07Z")

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I am using Windows version 5.10.0 Please find the image here. It is a normal CT image, and I don’t know why BRAINS is not working for this specific case. Thank you very much for any help.

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## [Calculating volume of bone samples - Student Needing Assistance Using Slicer for Project](https://discourse.slicer.org/t/calculating-volume-of-bone-samples-student-needing-assistance-using-slicer-for-project/45691)

<div class="topic-metadata">

**Author:** [@ntipton](https://discourse.slicer.org/u/ntipton)\
**Replies:** 0\
**Last updated:** [January 6, 2026, 1:06pm UTC](https://discourse.slicer.org/t/calculating-volume-of-bone-samples-student-needing-assistance-using-slicer-for-project/45691 "2026-01-06T13:06:31Z")

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Good evening, I am a student working on a research project and need assistance calculating volumes of bone samples using 3D Slicer. I have surface models (PLY files) for approximately 40 samples. Due to time constraint…

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## [Title: 2026.01.06 Weekly Meeting](https://discourse.slicer.org/t/title-2026-01-06-weekly-meeting/45682)

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**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [January 5, 2026, 9:32pm UTC](https://discourse.slicer.org/t/title-2026-01-06-weekly-meeting/45682 "2026-01-05T21:32:58Z")

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Tomorrow, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET. after the project week meetings. We will be re-using the same meeting link Anyone is welcome to join at this link: Launch Meeting - …

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## [PW Meeting Jan 6](https://discourse.slicer.org/t/pw-meeting-jan-6/45680)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [January 5, 2026, 9:31pm UTC](https://discourse.slicer.org/t/pw-meeting-jan-6/45680 "2026-01-05T21:31:47Z")

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Dear Project Week community, The next project week preparation meeting will be next Tomorrow, Tuesday, Jan 6, at 10:00 AM ET. (2026-01-06T15:00:00Z (UTC)) Here is the schedule of high-level discussion topics for the ne…

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## [Problems related to features between theory of radiomics and pyradiomics ](https://discourse.slicer.org/t/problems-related-to-features-between-theory-of-radiomics-and-pyradiomics/45679)

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**Author:** [@Cidi-2810](https://discourse.slicer.org/u/Cidi-2810)\
**Replies:** 0\
**Last updated:** [January 5, 2026, 9:28pm UTC](https://discourse.slicer.org/t/problems-related-to-features-between-theory-of-radiomics-and-pyradiomics/45679 "2026-01-05T21:28:50Z")

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https://docs.google.com/spreadsheets/d/1DA15prfyoDq8dxiiPZnI\_mUPHrWa\_AMV/edit?usp=sharing&ouid=116590247353327979827&rtpof=true&sd=true (This is a link excel that my partner and me did the test with features, I just test…

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## [Add Segment to SegmentationNode uses invalid color values (scalar) and adds a new colortable node](https://discourse.slicer.org/t/add-segment-to-segmentationnode-uses-invalid-color-values-scalar-and-adds-a-new-colortable-node/45498)

<div class="topic-metadata">

**Author:** [@baderstine](https://discourse.slicer.org/u/baderstine)\
**Replies:** 5\
**Last updated:** [January 3, 2026, 11:28pm UTC](https://discourse.slicer.org/t/add-segment-to-segmentationnode-uses-invalid-color-values-scalar-and-adds-a-new-colortable-node/45498 "2026-01-03T23:28:36Z")

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Summary: I am attempting to import/edit/export segmentations from numpy to slicer to numpy. I am using custom color tables but am getting invalid color IDs on export after a segment has been added. For example, my col…

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## [In 3D Slicer, is it possible to simulate femur cut in real-time without iMSTK?](https://discourse.slicer.org/t/in-3d-slicer-is-it-possible-to-simulate-femur-cut-in-real-time-without-imstk/45543)

<div class="topic-metadata">

**Author:** [@Vincent](https://discourse.slicer.org/u/Vincent)\
**Replies:** 6\
**Last updated:** [January 2, 2026, 5:20am UTC](https://discourse.slicer.org/t/in-3d-slicer-is-it-possible-to-simulate-femur-cut-in-real-time-without-imstk/45543 "2026-01-02T05:20:38Z")

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Hi, Support and development of iMSTK has been discontinued since May-02-2025. I would like to simulate femur cut in real-time with 3D Slicer. I have tried Mask volume effect, but it is not fast enough (the FPS is very …

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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)

<div class="topic-metadata">

**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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## [Curvature, torsion from VMTK](https://discourse.slicer.org/t/curvature-torsion-from-vmtk/45652)

<div class="topic-metadata">

**Author:** [@kuoi](https://discourse.slicer.org/u/kuoi)\
**Replies:** 0\
**Last updated:** [January 1, 2026, 5:24pm UTC](https://discourse.slicer.org/t/curvature-torsion-from-vmtk/45652 "2026-01-01T17:24:12Z")

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Hello, I am using the Extract Centerline module. I obtained one centerline and one table containing a single line with a pair of curvature and torsion values. I noticed that curvature and torsion are reported in the exp…

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## [Link a transform's visibility to transformed volume visibility](https://discourse.slicer.org/t/link-a-transforms-visibility-to-transformed-volume-visibility/45604)

<div class="topic-metadata">

**Author:** [@shai-ikko](https://discourse.slicer.org/u/shai-ikko)\
**Replies:** 5\
**Last updated:** [December 31, 2025, 4:19pm UTC](https://discourse.slicer.org/t/link-a-transforms-visibility-to-transformed-volume-visibility/45604 "2025-12-31T16:19:34Z")

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Hi, In my application, I want to load a volume, and give the user controls to spin it around. So when I load the volume, I also create a Transform, make the volume observe it, and then call transformNode.GetDisplayNode(…

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## [Segment Editor crashes during Logical Operators in segment editor (Intersect) - Windows 10 - Lenovo LOQ 5.10.0](https://discourse.slicer.org/t/segment-editor-crashes-during-logical-operators-in-segment-editor-intersect-windows-10-lenovo-loq-5-10-0/45635)

<div class="topic-metadata">

**Author:** [@zahra\_Tabasi](https://discourse.slicer.org/u/zahra_Tabasi)\
**Replies:** 4\
**Last updated:** [December 30, 2025, 10:54pm UTC](https://discourse.slicer.org/t/segment-editor-crashes-during-logical-operators-in-segment-editor-intersect-windows-10-lenovo-loq-5-10-0/45635 "2025-12-30T22:54:41Z")

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Title: Segment Editor crashes during Logical Operators (Intersect) - Windows 10 - Lenovo LOQ Slicer version: 5.10.0 (stable) + preview versions tested OS: Windows 10 Hardware: Lenovo LOQ 15IRH8 (i7-13th gen, 32GB RAM,…

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## [Postdoc position in Chicago IL for those with Slicer/image analysis/programming experience](https://discourse.slicer.org/t/postdoc-position-in-chicago-il-for-those-with-slicer-image-analysis-programming-experience/45646)

<div class="topic-metadata">

**Author:** [@Craniofacial](https://discourse.slicer.org/u/Craniofacial)\
**Replies:** 0\
**Last updated:** [December 30, 2025, 9:05pm UTC](https://discourse.slicer.org/t/postdoc-position-in-chicago-il-for-those-with-slicer-image-analysis-programming-experience/45646 "2025-12-30T21:05:53Z")

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Postdoctoral Research Fellow – Craniofacial, Orthognathic & Airway Image Analysis (3D Slicer) - Shriners Children’s Chicago contact: cpurnell@uic.edu We are seeking a highly motivated Postdoctoral Research Fellow with…

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## [Downloading older releases is problematic](https://discourse.slicer.org/t/downloading-older-releases-is-problematic/45645)

<div class="topic-metadata">

**Author:** [@dzenanz](https://discourse.slicer.org/u/dzenanz)\
**Replies:** 1\
**Last updated:** [December 30, 2025, 8:30pm UTC](https://discourse.slicer.org/t/downloading-older-releases-is-problematic/45645 "2025-12-30T20:30:08Z")

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Accessing older releases does not offer download of previous stable releases. I had to take a good look at access older releases page to come up with this link to what I wanted: https://download.slicer.org/download?os=wi…

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## [Clarification on Segment Statistics: Surface Area vs. Cross-Sectional Area (CSA) for Muscle Analysis](https://discourse.slicer.org/t/clarification-on-segment-statistics-surface-area-vs-cross-sectional-area-csa-for-muscle-analysis/45559)

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**Author:** [@GaetanoGazze](https://discourse.slicer.org/u/GaetanoGazze)\
**Replies:** 3\
**Last updated:** [December 30, 2025, 6:41pm UTC](https://discourse.slicer.org/t/clarification-on-segment-statistics-surface-area-vs-cross-sectional-area-csa-for-muscle-analysis/45559 "2025-12-30T18:41:31Z")

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Hi everyone, I am performing a quantitative body composition analysis on single-slice CT scans (at the D10 level) using the Segment Statistics module in 3D Slicer. I would like to clarify a methodological doubt to ensur…

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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)

<div class="topic-metadata">

**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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## [2025.12.16Weekly Meeting](https://discourse.slicer.org/t/2025-12-16weekly-meeting/45505)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 2\
**Last updated:** [December 30, 2025, 7:20am UTC](https://discourse.slicer.org/t/2025-12-16weekly-meeting/45505 "2025-12-30T07:20:46Z")

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Tomorrow, we will be having our next weekly hangout at 11:00 AM ET until 12:00 PM ET. after the project week meetings. We will be re-using the same meeting link Anyone is welcome to join at this link: Launch Meeting - …

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## [No meeting this week (Dec 30th)](https://discourse.slicer.org/t/no-meeting-this-week-dec-30th/45638)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [December 30, 2025, 4:31am UTC](https://discourse.slicer.org/t/no-meeting-this-week-dec-30th/45638 "2025-12-30T04:31:28Z")

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Enjoy the holidays! Thanks. Sam, Ebrahim and the rest of the Slicer dev team

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## [No PW Meeting this week (Dec 30th)](https://discourse.slicer.org/t/no-pw-meeting-this-week-dec-30th/45637)

<div class="topic-metadata">

**Author:** [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Replies:** 0\
**Last updated:** [December 30, 2025, 4:30am UTC](https://discourse.slicer.org/t/no-pw-meeting-this-week-dec-30th/45637 "2025-12-30T04:30:49Z")

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Enjoy the holidays! – The PW organizing committee: Tina Kapur, Simon Drouin, Rafael Palomar, Sam Horvath, Theodore Aptekarev

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## [ROI-based segmentation in MONAI Label Slicer extension does not work correctly for specific labels](https://discourse.slicer.org/t/roi-based-segmentation-in-monai-label-slicer-extension-does-not-work-correctly-for-specific-labels/45634)

<div class="topic-metadata">

**Author:** [@anuragp2018](https://discourse.slicer.org/u/anuragp2018)\
**Replies:** 0\
**Last updated:** [December 30, 2025, 4:27am UTC](https://discourse.slicer.org/t/roi-based-segmentation-in-monai-label-slicer-extension-does-not-work-correctly-for-specific-labels/45634 "2025-12-30T04:27:57Z")

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Problem Description I am using the MONAI Label Slicer extension to perform ROI-based segmentation for a specific label. Although the ROI is drawn correctly in Slicer, the segmentation result does not respect the selecte…

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## [First SlicerMorph short course with MorphoCloud was a success!](https://discourse.slicer.org/t/first-slicermorph-short-course-with-morphocloud-was-a-success/40538)

<div class="topic-metadata">

**Author:** [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Replies:** 4\
**Last updated:** [December 29, 2025, 1:51am UTC](https://discourse.slicer.org/t/first-slicermorph-short-course-with-morphocloud-was-a-success/40538 "2025-12-29T01:51:31Z")

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We just wrapped up 4th and final day of SlicerMorph 101 short course. It was a big success. As someone who had done fair number of online short courses like this and do NOT like the online format, I should say this worke…

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