Design of a non-docking intraoperative electron beam applicator system

Area of Science:

• Medical Physics
• Radiation Oncology
• Biomedical Engineering

Background:

• Traditional docking systems for intraoperative radiation therapy (IORT) present mechanical, electrical, and tumor visualization challenges.
• Electron beam collimation is critical for precise radiation delivery during IORT.

Purpose of the Study:

• To develop and present a novel non-docking collimation system for intraoperative radiation therapy.
• To overcome limitations associated with conventional docking systems in IORT.
• To evaluate the dosimetric characteristics and technical innovations of the new system.

Main Methods:

• Adaptation of a linear accelerator (SATURNE 43-CGR MeV) with a non-docking collimation system.
• Implementation of a laser system for central axis beam alignment with the cone.
• Utilizing a rigid clamping system to attach the intraoperative cone to the treatment couch.
• Evaluation of dosimetric properties, including dose distribution and leakage radiation.

Main Results:

• The non-docking system demonstrates improved dose homogeneity within the patient's target volume.
• Leakage radiation dose to tissues outside the intraoperative cone is minimized and accessible.
• The system is designed to be adaptable to various linear accelerator models.
• Technical innovations include precise beam alignment and secure cone fixation.

Conclusions:

• The developed non-docking collimation system offers a viable alternative for intraoperative radiation therapy.
• This novel applicator system enhances treatment precision and patient safety by improving dose distribution and reducing radiation leakage.
• The design's adaptability and technical innovations make it a promising advancement in IORT technology.