Adaptive control of phase leading compensator parameters applied to respiratory motion compensation system

Chia Chun Kuo, Ho Chiao Chuang, Hsiao Wei Yu, Jeng Wei Huang, Der Chi Tien, Shiu Chen Jeng, Jeng Fong Chiou

研究成果: 雜誌貢獻文章同行評審

4 引文 斯高帕斯(Scopus)


PURPOSE: This study evaluates the feasibility of our previously developed Respiratory Motion Compensation System (RMCS) combined with the Phase Lead Compensator (PLC) to eliminate system delays during the compensation of respiration-induced tumor motion. The study objective is to improve the compensation effect of RMCS and the efficay of radiation therapy to reduce its side effects to the patients. MATERIAL AND METHODS: In this study, LabVIEW was used to develop the proposed software for calculating real-time adaptive control parameters, combined with PLC and RMCS for the compensation of total system delay time. Experiments of respiratory motion compensation were performed using 6 pre-recorded human respiration patterns and 7 sets of different sine waves. During the experiments, a respiratory simulation device, Respiratory Motion Simulation System (RMSS), was placed on the RMCS, and the detected target motion signals by the Ultrasound Image Tracking Algorithm (UITA) were transmitted to the RMCS, and the compensation of respiration induced motion was started. Finally, the tracking error of the system is obtained by comparing the encoder signals bwtween RMSS and RMCS. The compensation efficacy is verified by the root mean squared error (RMSE) and the system compensation rate (CR). RESULTS: The experimental results show that the calcuated CR with the simulated respiration patterns is between 42.85% ∼3.53% and 33.76% ∼2.62% in the Right-Left (RL) and Superior-Inferior (SI), respectively, after the RMCS compensation of using the adaptive control parameters in PLC. For the compensation results of human respiration patterns, the CR is between 58.95% ∼8.56% and 62.87% ∼9.05% in RL and SI, respectively. CONCLUSIONS: During the respiratory motion compensation, the influence of the delay time of the entire system (RMCS+RMSS+UITA) on the compensation effect was improved by adding an adaptive control PLC, which reduces compensation error and helps improve efficacy of radiation therapy.

頁(從 - 到)715-729
期刊Journal of X-Ray Science and Technology
出版狀態已發佈 - 1月 1 2019

ASJC Scopus subject areas

  • 輻射
  • 儀器
  • 放射學、核子醫學和影像學
  • 凝聚態物理學
  • 電氣與電子工程


深入研究「Adaptive control of phase leading compensator parameters applied to respiratory motion compensation system」主題。共同形成了獨特的指紋。