Intraoperative optimized inverse planning for prostate brachytherapy: early experience

Area of Science:

• Medical Physics
• Radiation Oncology
• Surgical Technology

Background:

• Prostate seed implantation is a common treatment for localized prostate cancer.
• Traditional treatment planning for prostate brachytherapy is performed preoperatively.
• Intraoperative planning allows for real-time adjustments based on anatomical changes during surgery.

Purpose of the Study:

• To demonstrate the feasibility of an intraoperative inverse planning technique for prostate seed implantation.
• To evaluate the efficacy of advanced optimization algorithms in an operating room setting.
• To assess the potential of real-time treatment adjustments for improved outcomes.

Main Methods:

• Implementation of an integrated treatment planning system for intraoperative use.
• Utilizing a genetic algorithm (GA) driven engine (PIPER) for optimized inverse planning.
• Real-time ultrasound imaging, segmentation, optimization, and virtual reality surgical guidance were employed.
• Ten consecutive prostate seed implantation patients were included in the feasibility study.

Main Results:

• The intraoperative inverse planning technique was successfully implemented and monitored in the operating room.
• Median times for image capture, segmentation, GA optimization, and plan evaluation were 4, 10, 2.2, and 2 minutes, respectively.
• The dosimetric quality of the intraoperatively generated plans was equivalent to conventional preoperatively planned implants.

Conclusions:

• An intraoperative optimized inverse planning technique for prostate brachytherapy has been developed.
• The feasibility of this advanced technique was demonstrated through early clinical experience.
• This approach holds promise for enhancing the precision and adaptability of prostate seed implantation.