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Research on Prostate Brachytherapy Robot Design and Puncture Control Strategy
Xuesong Dai1,2, Yongde Zhang3, Yue Sun2
1School of Mechanical Engineering, Tianjin University, Tianjin, China.
Summary
This study introduces a robotic system for prostate brachytherapy that minimizes needle deflection during radioactive seed implantation, significantly improving treatment accuracy and reducing errors.
Area of Science:
- Medical Robotics
- Oncology
- Biomedical Engineering
Background:
- Prostate brachytherapy uses oblique-tip needles for radioactive seed delivery.
- Needle deflection during insertion compromises treatment accuracy.
Purpose of the Study:
- To develop a method to enhance precision in prostate brachytherapy seed implantation.
- To minimize needle deflection during radioactive seed delivery.
Main Methods:
- A modular robotic system was developed.
- Preoperative planning combined with real-time intraoperative corrections.
- An adaptive PID controller with reinforcement learning was used for corrective forces.
Main Results:
- The proposed method reduced average seed implantation error to 1.92 mm.
- Standard error for seed implantation was 0.56 mm.
- The system effectively minimized needle deflection.
Conclusions:
- The robotic system and control method improve seed implantation precision.
- This approach shows promise for enhancing prostate cancer therapy outcomes.
