# \#registration

**URL:** https://discourse.slicer.org/tag/registration/2.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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## [Applying boundary constraints to DRR volumes in SlicerAutoscoperM](https://discourse.slicer.org/t/applying-boundary-constraints-to-drr-volumes-in-slicerautoscoperm/48106)

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**Author:** [@Dorte](https://discourse.slicer.org/u/Dorte)\
**Replies:** 1\
**Last updated:** [September 10, 2026, 7:22am UTC](https://discourse.slicer.org/t/applying-boundary-constraints-to-drr-volumes-in-slicerautoscoperm/48106 "2026-09-10T07:22:41Z")

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Hello Slicer team and Slicer community, I’m working with monoplanar videoradiography, and I’m trying to reduce depth ambiguity during bone tracking. I was wondering whether SlicerAutoscoperM allows applying geometric o…

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## [How to quickly recompile updated code based on the current build version](https://discourse.slicer.org/t/how-to-quickly-recompile-updated-code-based-on-the-current-build-version/48089)

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**Author:** [@zhuofalin](https://discourse.slicer.org/u/zhuofalin)\
**Replies:** 1\
**Last updated:** [September 7, 2026, 2:23pm UTC](https://discourse.slicer.org/t/how-to-quickly-recompile-updated-code-based-on-the-current-build-version/48089 "2026-09-07T14:23:19Z")

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Hello, I am very happy to be back in the Slicer community.:grinning\_face: I typically use an older version of the slicer for development, but thanks to the efforts of the developers, new features are constantly being a…

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## [Recurring bug on Shoulder tracking](https://discourse.slicer.org/t/recurring-bug-on-shoulder-tracking/47656)

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**Author:** [@AlonsoFigueroa](https://discourse.slicer.org/u/AlonsoFigueroa)\
**Replies:** 12\
**Last updated:** [August 27, 2026, 4:13pm UTC](https://discourse.slicer.org/t/recurring-bug-on-shoulder-tracking/47656 "2026-08-27T16:13:35Z")

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Hello SAM team, We are encountering an issue while tracking a scapula in Autoscoper during an arm elevation task. For one participant, Autoscoper consistently crashes when saving frames within specific ranges of motion…

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## [Aligning CBCT & intraoral scan](https://discourse.slicer.org/t/aligning-cbct-intraoral-scan/45801)

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**Author:** [@Aiden](https://discourse.slicer.org/u/Aiden)\
**Replies:** 3\
**Last updated:** [July 29, 2026, 6:53am UTC](https://discourse.slicer.org/t/aligning-cbct-intraoral-scan/45801 "2026-07-29T06:53:11Z")

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I have a STL from an intraoral scan with 3shape, and a CBCT in dicom. How can I align these semi automatically using a few manual landmarks? What I have: 1x Skull CBCT dicom (edit: I also have a segmentation of this fr…

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## [Overlay of coregistered brain MRI and CT](https://discourse.slicer.org/t/overlay-of-coregistered-brain-mri-and-ct/35465)

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**Author:** [@Kerezoudis](https://discourse.slicer.org/u/Kerezoudis)\
**Replies:** 2\
**Last updated:** [July 8, 2026, 8:53am UTC](https://discourse.slicer.org/t/overlay-of-coregistered-brain-mri-and-ct/35465 "2026-07-08T08:53:44Z")

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Operating system: MacOs Sonoma 14.4.1 Slicer version: 5.6.1 Expected behavior: I would like to overlay preoperative brain MRI with postoperative CT (after electrode placement) Actual behavior: images are not aligned. …

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## [How can Calculate & Visualize the Center of Mass (COM)?](https://discourse.slicer.org/t/how-can-calculate-visualize-the-center-of-mass-com/47074)

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**Author:** [@zahra\_Tabasi](https://discourse.slicer.org/u/zahra_Tabasi)\
**Replies:** 3\
**Last updated:** [June 15, 2026, 10:30pm UTC](https://discourse.slicer.org/t/how-can-calculate-visualize-the-center-of-mass-com/47074 "2026-06-15T22:30:38Z")

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Hello everyone, I am currently conducting a research study involving patients with unilateral left-sided breast cancer undergoing radiotherapy. The purpose of my study is to compare Normal Breathing (free breathing) and…

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## [New extension: RadReirradiation for radiotherapy reirradiation analysis and EQD2 dose accumulation](https://discourse.slicer.org/t/new-extension-radreirradiation-for-radiotherapy-reirradiation-analysis-and-eqd2-dose-accumulation/47028)

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**Author:** [@LuisParedesOcampo](https://discourse.slicer.org/u/LuisParedesOcampo)\
**Replies:** 0\
**Last updated:** [May 14, 2026, 2:23pm UTC](https://discourse.slicer.org/t/new-extension-radreirradiation-for-radiotherapy-reirradiation-analysis-and-eqd2-dose-accumulation/47028 "2026-05-14T14:23:00Z")

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Hi everyone, I’d like to introduce RadReirradiation, a new 3D Slicer extension designed to support clinical reirradiation workflows in radiotherapy. The extension provides the following features: • Voxel-by-voxel BED …

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## [SlicerQR Development](https://discourse.slicer.org/t/slicerqr-development/15954)

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**Author:** [@spycolyf](https://discourse.slicer.org/u/spycolyf)\
**Replies:** 155\
**Last updated:** [April 27, 2026, 9:56am UTC](https://discourse.slicer.org/t/slicerqr-development/15954 "2026-04-27T09:56:37Z")

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@jcfr @pieper @lassoan @superlib Good Morning. I’m starting to think about how to deploy SlicerQR to 25,000 PCs across the Mayo Enterprise. After building the package, it consists of over 7000 files at a total size of o…

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## [DECA mean shape model: partly coarse surface](https://discourse.slicer.org/t/deca-mean-shape-model-partly-coarse-surface/46332)

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**Author:** [@MrMarkus](https://discourse.slicer.org/u/MrMarkus)\
**Replies:** 8\
**Last updated:** [March 16, 2026, 4:02pm UTC](https://discourse.slicer.org/t/deca-mean-shape-model-partly-coarse-surface/46332 "2026-03-16T16:02:33Z")

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Hi, I am using DECA for some shape analysis. I am wondering why the resulting reference / atlas shape model appears to have partly coarse surface. The workflow for comparing 2 groups looks like this: first: using …

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## [Odd behavior after adding a moving mask in the ANTs extension](https://discourse.slicer.org/t/odd-behavior-after-adding-a-moving-mask-in-the-ants-extension/46117)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 9\
**Last updated:** [March 4, 2026, 5:52pm UTC](https://discourse.slicer.org/t/odd-behavior-after-adding-a-moving-mask-in-the-ants-extension/46117 "2026-03-04T17:52:15Z")

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I’ve been using the ANTs extension for registering two single-label volumes to eachother with good results. In an attempt to improve registration robustness, I started incorporating fixed and moving masks (FM, MM), but …

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## [DECA --\> any requirements on decimation of the model?](https://discourse.slicer.org/t/deca-any-requirements-on-decimation-of-the-model/46282)

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**Author:** [@MrMarkus](https://discourse.slicer.org/u/MrMarkus)\
**Replies:** 1\
**Last updated:** [February 25, 2026, 4:16pm UTC](https://discourse.slicer.org/t/deca-any-requirements-on-decimation-of-the-model/46282 "2026-02-25T16:16:46Z")

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Hi, I am wondering if there are any recommandations for decimation of the 3D model of interest. Working with CT data of mouse skull, the original 3D ply model is about 100 MB. After running “quadratic” decimation wit…

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## [Elastic Registration](https://discourse.slicer.org/t/elastic-registration/46025)

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**Author:** [@Zah](https://discourse.slicer.org/u/Zah)\
**Replies:** 2\
**Last updated:** [February 22, 2026, 11:19am UTC](https://discourse.slicer.org/t/elastic-registration/46025 "2026-02-22T11:19:06Z")

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Hi 3D Slicer Community, I’m new to 3D Slicer and still learning, and I have a few questions. After performing an elastic registration, should I harden the transformed CBCT using the “Transforms” module, or should thi…

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## [3D Slicer Tutorial Videos — Porosity Analysis, Image Registration & More 🚀](https://discourse.slicer.org/t/3d-slicer-tutorial-videos-porosity-analysis-image-registration-more/46198)

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**Author:** [@Academy.XRM](https://discourse.slicer.org/u/Academy.XRM)\
**Replies:** 2\
**Last updated:** [February 18, 2026, 2:25pm UTC](https://discourse.slicer.org/t/3d-slicer-tutorial-videos-porosity-analysis-image-registration-more/46198 "2026-02-18T14:25:31Z")

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Hi everyone, I’ve started a YouTube tutorial series focused on practical workflows in 3D Slicer, and I’d love to share it with the community here. So far, the videos cover topics such as: • Porosity analysis workflows …

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## [CBCT volumetric alveolar comparison before after bone graft](https://discourse.slicer.org/t/cbct-volumetric-alveolar-comparison-before-after-bone-graft/45920)

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**Author:** [@Zah](https://discourse.slicer.org/u/Zah)\
**Replies:** 1\
**Last updated:** [February 17, 2026, 12:45pm UTC](https://discourse.slicer.org/t/cbct-volumetric-alveolar-comparison-before-after-bone-graft/45920 "2026-02-17T12:45:56Z")

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Hi there, I am totally new to slicer and would like to use it for a research study where volumetric changes of alveolar bone is measured before and after grafting. I have gone through the tutorials and there is a quantit…

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## [Guidance on Intensity Correction for Siemens Multiband EPI Data](https://discourse.slicer.org/t/guidance-on-intensity-correction-for-siemens-multiband-epi-data/46155)

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**Author:** [@Muhammad\_Faizan](https://discourse.slicer.org/u/Muhammad_Faizan)\
**Replies:** 1\
**Last updated:** [February 14, 2026, 4:56am UTC](https://discourse.slicer.org/t/guidance-on-intensity-correction-for-siemens-multiband-epi-data/46155 "2026-02-14T04:56:26Z")

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I am working with EPI d ata acquired on a Siemens 3T scanner. The data is multiband with no in-plane acceleration. I reconstructed the multiband data using the slice GRAPPA technique. However, I am facing an issue: …

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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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## [Saving parameter preset in ANTs extension changes initialization value](https://discourse.slicer.org/t/saving-parameter-preset-in-ants-extension-changes-initialization-value/45993)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 8\
**Last updated:** [February 3, 2026, 12:40am UTC](https://discourse.slicer.org/t/saving-parameter-preset-in-ants-extension-changes-initialization-value/45993 "2026-02-03T00:40:14Z")

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In the General ANTs 3D slicer extension I noticed something rather odd. I can take one of the default parameter presets, say “QuickSyn”, change nothing, and click “save as preset”. The new .json preset saves in the cor…

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## [Landmark registration overlay not showing up](https://discourse.slicer.org/t/landmark-registration-overlay-not-showing-up/45965)

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**Author:** [@RHB](https://discourse.slicer.org/u/RHB)\
**Replies:** 2\
**Last updated:** [January 28, 2026, 3:25pm UTC](https://discourse.slicer.org/t/landmark-registration-overlay-not-showing-up/45965 "2026-01-28T15:25:02Z")

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Hi, I have 2 2D oct slices that I want to register mutually, these are not 3D volume, just retinal 2D slice and previously I tried to do Landmark registration using these, it worked. Now after that I am trying to do the…

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## [Recovering or creating a large nonlinear inverse transform from an ANTs registration](https://discourse.slicer.org/t/recovering-or-creating-a-large-nonlinear-inverse-transform-from-an-ants-registration/45712)

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**Author:** [@sulli419](https://discourse.slicer.org/u/sulli419)\
**Replies:** 17\
**Last updated:** [January 27, 2026, 3:38am UTC](https://discourse.slicer.org/t/recovering-or-creating-a-large-nonlinear-inverse-transform-from-an-ants-registration/45712 "2026-01-27T03:38:01Z")

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I need to invert a nonlinear transform generated with the standard 3D Slicer ANTs extension, so it can be applied back to the fixed image to make it more like the moving, but it is becoming clear I do not understand how …

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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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## [How to superimpose 2 stl files. Need help](https://discourse.slicer.org/t/how-to-superimpose-2-stl-files-need-help/45827)

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**Author:** [@DrSifali](https://discourse.slicer.org/u/DrSifali)\
**Replies:** 5\
**Last updated:** [January 20, 2026, 7:19pm UTC](https://discourse.slicer.org/t/how-to-superimpose-2-stl-files-need-help/45827 "2026-01-20T19:19:34Z")

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I need help on how to superimpose 2 stl files to analyze tooth movements

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## [Slicer-SurfaceFragmentsRegistration](https://discourse.slicer.org/t/slicer-surfacefragmentsregistration/45777)

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**Author:** [@Esteban\_Barreiro](https://discourse.slicer.org/u/Esteban_Barreiro)\
**Replies:** 0\
**Last updated:** [January 14, 2026, 2:58pm UTC](https://discourse.slicer.org/t/slicer-surfacefragmentsregistration/45777 "2026-01-14T14:58:16Z")

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Hi! I work with FDM 3D printing, and recently found this new extension (Slicer-SurfaceFragmentsRegistration) https://github.com/sebastianandress/Slicer-SurfaceFragmentsRegistration/tree/master but I don’t fully unders…

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## [Generating a Deformed Image Using BSpline Transform in 3D Slicer](https://discourse.slicer.org/t/generating-a-deformed-image-using-bspline-transform-in-3d-slicer/45553)

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**Author:** [@A\_Eskandari](https://discourse.slicer.org/u/A_Eskandari)\
**Replies:** 1\
**Last updated:** [January 14, 2026, 2:31pm UTC](https://discourse.slicer.org/t/generating-a-deformed-image-using-bspline-transform-in-3d-slicer/45553 "2026-01-14T14:31:42Z")

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Hello everyone, I need to obtain CT images of a phantom (e.g., a Rando phantom) in two different states: Fixed Image: The initial, undeformed state of the phantom. Moving Image: The same phantom with a known and pre-d…

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

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**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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## [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)

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**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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## [How to correctly warp a CCT RTSTRUCT target volume to 4DCT after CCT→4DCT registration?](https://discourse.slicer.org/t/how-to-correctly-warp-a-cct-rtstruct-target-volume-to-4dct-after-cct-4dct-registration/45377)

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**Author:** [@Huoqin\_Zhou](https://discourse.slicer.org/u/Huoqin_Zhou)\
**Replies:** 1\
**Last updated:** [December 9, 2025, 10:00am UTC](https://discourse.slicer.org/t/how-to-correctly-warp-a-cct-rtstruct-target-volume-to-4dct-after-cct-4dct-registration/45377 "2025-12-09T10:00:23Z")

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(Original post deleted upon author’s request to protect private information. -staff)

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## [Register two 2D images (EPID and DRR)](https://discourse.slicer.org/t/register-two-2d-images-epid-and-drr/45057)

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**Author:** [@ruju](https://discourse.slicer.org/u/ruju)\
**Replies:** 0\
**Last updated:** [November 12, 2025, 10:07pm UTC](https://discourse.slicer.org/t/register-two-2d-images-epid-and-drr/45057 "2025-11-12T22:07:58Z")

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Hi, I would like to register two 2D images in 3D Slicer, one is an EPID image and the other is a computed DRR. Unfortunately, the EPID image does not contain any geometric information, so it is placed arbitrarily when l…

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## [Using 3d slicer and python](https://discourse.slicer.org/t/using-3d-slicer-and-python/45037)

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**Author:** [@Shveta\_Duggal](https://discourse.slicer.org/u/Shveta_Duggal)\
**Replies:** 0\
**Last updated:** [November 11, 2025, 2:31pm UTC](https://discourse.slicer.org/t/using-3d-slicer-and-python/45037 "2025-11-11T14:31:13Z")

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Where is the link for segmentation? Thank you so much

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## [Segmentation of 4D sequence volumes using Sequence Registration](https://discourse.slicer.org/t/segmentation-of-4d-sequence-volumes-using-sequence-registration/20567)

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**Author:** [@Shambhavi\_Malik](https://discourse.slicer.org/u/Shambhavi_Malik)\
**Replies:** 5\
**Last updated:** [November 10, 2025, 3:35pm UTC](https://discourse.slicer.org/t/segmentation-of-4d-sequence-volumes-using-sequence-registration/20567 "2025-11-10T15:35:37Z")

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I am trying to segment the CT Cardio Volume Sequence (from the Slicer sample data). I have followed all the steps as mentioned in Load multiple cardiac phases for segmentation/virtual reality question that was posted ear…

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## [Get data of patient from images](https://discourse.slicer.org/t/get-data-of-patient-from-images/14693)

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**Author:** [@Valentina\_Mejia\_Gall](https://discourse.slicer.org/u/Valentina_Mejia_Gall)\
**Replies:** 2\
**Last updated:** [October 30, 2025, 4:43pm UTC](https://discourse.slicer.org/t/get-data-of-patient-from-images/14693 "2025-10-30T16:43:34Z")

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Hello, I download a CTSCAN of the lower limb, this images includes femur, tibia, etc. How could i know the mass, height or data of the patient from these files in 3Dslicer?

[Next page](https://discourse.slicer.org/tag/registration/2.md?match_all_tags=true&page=1&tags%5B%5D=registration)