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Image guidance for precise conformal radiotherapy
Thomas Rockwell Mackie1, Jeff Kapatoes, Ken Ruchala
1Department of Human Oncology, University of Wisconsin, Madison, WI, USA.
Summary
Helical tomotherapy offers advanced image-guided precision conformal radiotherapy, enabling precise tumor targeting while sparing critical structures. This integrated system enhances treatment verification using megavoltage CT imaging.
Area of Science:
- Radiation Oncology
- Medical Physics
- Radiotherapy Technology
Background:
- Image guidance is becoming central to radiotherapy planning, delivery, and verification.
- Precision in disease localization and treatment volume definition is crucial.
- Conformal avoidance methodology is used when precise margins are challenging.
Purpose of the Study:
- To review the current state of image-guided precision conformal radiotherapy.
- To compare helical tomotherapy with image-guided practices in conventional radiotherapy.
Main Methods:
- Helical tomotherapy utilizes CT imaging for integrated planning, delivery, and verification.
- Describes image-guided processes within helical tomotherapy.
- Includes megavoltage CT acquisition, automated segmentation, dose reconstruction, and deformable image registration.
Main Results:
- Presents results of helical tomotherapy for image-guided intensity-modulated radiotherapy.
- Demonstrates processes like automated segmentation and dose reconstruction.
- Highlights the capability for reoptimization based on daily imaging.
Conclusions:
- Image-guided precision conformal radiotherapy effectively treats tumors while sparing critical structures.
- Helical tomotherapy is an integrated system designed for image-guided intensity-modulated radiotherapy.
- Enables novel verification processes utilizing megavoltage CT images.