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Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
Published on: June 7, 2015
Volumetric tracking tool using four-dimensional CT for image guided-radiation therapy.
Rie Tanaka1, Shinichiro Mori, Masahiro Endo
1Department of Radiological Technology, Graduate School of Medical Science, Kanazawa University, Kodatsuno, Kanazawa, Japan. rie44@mhs.mp.kanazawa-u.ac.jp
Radiological Physics and Technology
|September 8, 2010
Summary
Computerized tracking software for multi-slice CT (MSCT) accurately analyzes lung vessel motion. This automated system offers real-time tracking, significantly reducing time for radiotherapy planning and improving image-guided radiation therapy (IGRT).
Area of Science:
- Medical Imaging
- Radiotherapy
- Computational Biology
Background:
- Accurate analysis of lung vessel motion is crucial for effective radiotherapy.
- Current methods for tracking lung vessels can be time-consuming and labor-intensive.
Purpose of the Study:
- To develop and evaluate computerized tracking software for analyzing lung vessel motion using multi-slice CT (MSCT) data.
- To assess the accuracy and efficiency of this automated system compared to manual tracking.
Main Methods:
- Developed computerized tracking software utilizing template matching for multi-slice CT (MSCT) data.
- Evaluated tracking accuracy in porcine lungs using 256-MSCT under free-breathing conditions.
- Compared automated tracking results with manual tracking for validation.
Main Results:
- The computerized tracking system demonstrated no significant difference compared to manual tracking.
- Maximum tracking error was less than 1.4 mm in all directions.
- Automated tracking allowed for real-time analysis and significantly reduced time for displacement determination.
Conclusions:
- The developed 256-MSCT with computerized tracking system accurately quantifies lung vessel motion during respiration.
- This quantitative information is valuable for clinical radiotherapy planning and image-guided radiation therapy (IGRT), especially for areas with significant respiratory displacement like the lower lung and liver.
