# \#ants

**URL:** https://discourse.slicer.org/tag/ants/539.md

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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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## [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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## [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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## [Cloning a composite transform yields incorrect result](https://discourse.slicer.org/t/cloning-a-composite-transform-yields-incorrect-result/44654)

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**Author:** [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Replies:** 6\
**Last updated:** [October 14, 2025, 3:03am UTC](https://discourse.slicer.org/t/cloning-a-composite-transform-yields-incorrect-result/44654 "2025-10-14T03:03:40Z")

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A composite transform node, such as those created by an ANTs QuickSyN registration, is not cloned correctly by the subject hierarchy node. I am using Slicer 5.8.1 on Windows 11. I have been working on taking apart and r…