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Pre- and intra-irradiation multimodal image registration: principles and first experiments
L Brunie1, S Lavallée, J Troccaz
1Laboratoire TIMC-IMAG-CNRS, Faculté de médecine, La Tronche, France.
Summary
Accurate patient repositioning using automatic portal image registration with 3D imaging enhances high-precision radiotherapy. This computer vision method enables real-time adjustment of treatment strategies based on patient position.
Area of Science:
- Medical Physics
- Radiotherapy Technology
- Medical Imaging
Background:
- Accurate patient positioning is critical for effective high-precision radiotherapy.
- Current methods may require manual adjustments, introducing potential inaccuracies.
- Integrating pre-treatment imaging with real-time data is crucial for adaptive radiotherapy.
Purpose of the Study:
- To develop and evaluate an automatic multimodal image registration method for radiotherapy patient positioning.
- To enable automatic adjustment of radiotherapy treatment strategies based on real-time patient position.
- To validate the proposed method using phantom experiments.
Main Methods:
- Utilizing computer vision techniques for image registration.
- Registering 2D portal images with 3D pre-session imaging data (CT/MR).
- Implementing an automated workflow for patient repositioning and strategy adjustment.
Main Results:
- Demonstrated successful automatic registration between portal images and 3D pre-session data.
- Showcased the potential for automatic adjustment of planned radiotherapy strategies.
- Initial experiments with a phantom provided preliminary validation of the method.
Conclusions:
- Automatic portal image registration offers a viable solution for accurate patient repositioning in radiotherapy.
- This technology can enhance the precision and efficiency of adaptive radiotherapy.
- Further clinical validation is warranted to assess its full potential in patient treatment.