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# 2D/3D registration with Digitally Reconstructed Topograms
# 2D/3D Registration with Digitally Reconstructed Topograms
This project provides a framework for 2D/3D registration using Digitally Reconstructed Topogram (DRT) images, which are generated from 3D CT volumes using a modified version of the Siddon-Jacobs ray casting algorithm.
# Requirements
In addition to DRT generation, the framework extends [ITKTwoProjectionRegistration](https://github.com/InsightSoftwareConsortium/ITKTwoProjectionRegistration) in several key areas, including:
- Compliance with IEC 61217
- Revised and consistent reference coordinate systems
- Improved handling of small transformations via trilinear interpolation of 3D CT voxel intensities, enhancing DRT rendering accuracy when transform magnitudes are below the CT resolution
# Contributors
## Requirements
Work in progress — requirements and example code to be added.
## Contributors
- Giovanni Fattori
- Riccardo Via