Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (9): 90502-090502.doi: 10.11889/j.0253-3219.2015.hjs.38.090502


Design of MLC’s control system for IORT accelerators

DU Xijiu1 JIANG Geyang2 YE Bin1 CHEN Guanghua2 CHEN Jianfeng2 SHEN Liren2   

  1. 1(SinoPower Accelerator Co., Ltd., Dongguan 523000, China) 2(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China)
  • Received:2015-06-09 Revised:2015-06-26 Online:2015-09-10 Published:2015-09-10
  • Contact: Geyang Jiang

Abstract: Background: The multi-leaf collimator (MLC) is one of key components of modern medical accelerators for Intra-operative Radiation Therapy (IORT). The stability and accuracy of MLC’s control system will insure patients’ life security during radiation therapy. Comparing with the world’s top level, domestic MLC technologies falls behind not only in stability but also in accuracy. Purpose: This study aims to design a MLC control system satisfying the requirements of developing the first domestic IORT accelerator and closing the gap with the world advanced level. Methods: The MLC control system was reconfigurated by the System-on-a-Programmable-Chip (SOPC) technique based on the traditional MLC control system. By adding new function model, preventing Electromagnetic Interference (EMI) and other ways, the newly developed MLC control system can fulfill IORT accelerator’s function and mechanical installation requirements. Results and Conclusion: The test results show that the control system possess properties of full functionalities, redundant position feedback, conformity to national standards of medical instruments and insuring the R&D of IORT accelerator.

Key words: MLC, Accelerator, FPGA, LabVIEW