---
id: itk-registration
version: "5.4.7"
license: Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for… (full text in the JSON record)
license_treatment: permissive
maintenance: active
---

# itk-registration — ITK is an open-source toolkit for multidimensional image analysis

License: permissive · Maintenance: active · Downloads: 211.9K/mo

## What it is and what it does

itk-registration is a Python module that wraps the Insight Toolkit's registration algorithms, allowing you to align and establish correspondences between medical and scientific images. It is part of the broader ITK ecosystem, which specializes in N-dimensional image processing for medical imaging, research, and scientific applications. The module depends on itk-filtering for image manipulation and provides access to ITK's registration methods through Python.

You would use this package when you need to align two images—for example, registering a CT scan to an MRI scan to combine diagnostic information, or aligning time-series images in longitudinal studies. It is designed for developers and researchers working with medical imaging, not for end-user applications, and integrates into Python workflows alongside other scientific computing libraries.

Use it for:

- Align CT and MRI scans in medical imaging workflows to fuse diagnostic information
- Register pre- and post-operative images to track surgical outcomes
- Establish correspondence between time-series medical images for longitudinal analysis
- Align microscopy or scientific imaging data for multi-modal analysis
- Develop custom registration pipelines by combining ITK registration with filtering and segmentation

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

itk-registration provides Python bindings for ITK's image registration algorithms, enabling alignment and correspondence mapping between medical and scientific images.

Yes, if you are developing medical imaging or scientific image analysis applications in Python and need registration capabilities. The package is actively maintained, has no known vulnerabilities, and is licensed permissively. Medium install friction is typical for compiled scientific packages and should not be a barrier. Not recommended if you need only basic image alignment—evaluate whether ITK's scope matches your use case first.

## Install

pip install itk-registration
uv add itk-registration
poetry add itk-registration

## Installing itk-registration

Before you install: Medium install friction due to compiled wheel dependencies across multiple platforms. Active maintenance with a release 7 days ago and 1643 repository stars indicate ongoing support. Requires itk-filtering as a runtime dependency.

License in practice: Apache License 2.0 permits both commercial and non-commercial use with minimal restrictions. You may use, modify, and redistribute the package provided you include license notices and attribute changes.

Quickstart:

pip install itk-registration

import itk

# Load images and create registration filter
fixed_image = itk.imread('fixed.nii')
moving_image = itk.imread('moving.nii')
registration = itk.ImageRegistrationMethodv4.New(fixed_image, moving_image)

Requires itk-filtering to be installed; prebuilt wheels available for Python 3.9–3.11 on Linux, macOS (x86_64 and ARM64), and Windows.

Verify before relying:

- Specific registration algorithms and transforms available in version 5.4.7
- Performance characteristics for large 3D/4D medical image datasets
- Integration patterns with other ITK modules beyond itk-filtering

## Package facts

- License: Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for… (full text in the JSON record) (permissive)
- Python support: supports_current
- Install friction: medium
- Maintenance: active
- Downloads: 211.9K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

image registration python, medical image alignment, itk registration bindings, image correspondence mapping, deformable image registration, ct mri scan alignment, scientific image registration, medical-imaging, image-registration, itk-ecosystem

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