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Kuo C, Guo M, Liao A, Yu H, Ganesan M, Li C, Jeng S, Chiou J, Ting L, Chuang H. Combining the wavelet transform with a phase-lead compensator to a respiratory motion compensation system with an ultrasound tracking technique in radiation therapy. Biomed Signal Process Control 2022; 78:103892. [DOI: 10.1016/j.bspc.2022.103892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kuo CC, Chuang HC, Liao AH, Yu HW, Cai SR, Tien DC, Jeng SC, Chiou JF. Fast Fourier transform combined with phase leading compensator for respiratory motion compensation system. Quant Imaging Med Surg 2020; 10:907-920. [PMID: 32489916 DOI: 10.21037/qims.2020.03.19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Background The reduction of the delaying effect in the respiratory motion compensation system (RMCS) is still impossible to completely correct the respiratory waveform of the human body due to each patient has a unique respiratory rate. In order to further improve the effectiveness of radiation therapy, this study evaluates our previously developed RMCS and uses the fast Fourier transform (FFT) algorithm combined with the phase lead compensator (PLC) to further improve the compensation rate (CR) of different respiratory frequencies and patterns of patients. Methods In this study, an algorithm of FFT automatic frequency detection was developed by using LabVIEW software, uisng FFT combined with PLC and RMCS to compensate the system delay time. Respiratory motion compensation experiments were performed using pre-recorded respiratory signals of 25 patients. During the experiment, the respiratory motion simulation system (RMSS) was placed on the RMCS, and the pre-recorded patient breathing signals were sent to the RMCS by using our previously developed ultrasound image tracking algorithm (UITA). The tracking error of the RMCS is obtained by comparing the encoder signals of the RMSS and RMCS. The compensation effect is verified by root mean squared error (RMSE) and system CR. Results The experimental results show that the patient's respiratory patterns compensated by the RMCS after using the proposed FFT combined with PLC control method, the RMSE is between 1.50-5.71 and 3.15-8.31 mm in the right-left (RL) and superior-inferior (SI) directions, respectively. CR is between 72.86-93.25% and 62.3-83.81% in RL and SI, respectively. Conclusions This study used FFT combined with PLC control method to apply to RMCS, and used UITA for respiratory motion compensation. Under the automatic frequency detection, the best dominant frequency of the human respiratory waveform can be determinated. In radiotherapy, it can be used to compensate the tumor movement caused by respiratory motion and reduce the radiation damage and side effects of normal tissues nearby the tumor.
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Affiliation(s)
- Chia-Chun Kuo
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan.,Department of Radiation Oncology, Wanfang Hospital, Taipei Medical University, Taipei, Taiwan.,School of Health Care Administration, College of Management, Taipei Medical University, Taipei, Taiwan
| | - Ho-Chiao Chuang
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Ai-Ho Liao
- Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.,Department of Biomedical Engineering, National Defense Medical Center, Taipei, Taiwan
| | - Hsiao-Wei Yu
- Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan
| | - Syue-Ru Cai
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Der-Chi Tien
- Department of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Shiu-Chen Jeng
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan.,School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jeng-Fong Chiou
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan.,Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan.,Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Kuo CC, Chuang HC, Yu HW, Huang JW, Tien DC, Jeng SC, Chiou JF. Adaptive control of phase leading compensator parameters applied to respiratory motion compensation system. J Xray Sci Technol 2019; 27:715-729. [PMID: 31227683 DOI: 10.3233/xst-190503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
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.
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Affiliation(s)
- Chia-Chun Kuo
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Radiation Oncology, Wanfang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Ho-Chiao Chuang
- Department of Mechanical Engineering National Taipei University of Technology, Taipei, Taiwan
| | - Hsiao-Wei Yu
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Jeng-Wei Huang
- Department of Mechanical Engineering National Taipei University of Technology, Taipei, Taiwan
| | - Der-Chi Tien
- Department of Mechanical Engineering National Taipei University of Technology, Taipei, Taiwan
| | - Shiu-Chen Jeng
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jeng-Fong Chiou
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Taipei Cancer Center, Taipei Medical University, Taipei, Taiwan
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Ting LL, Chuang HC, Liao AH, Kuo CC, Yu HW, Zhou YL, Tien DC, Jeng SC, Chiou JF. Experimental verification of a two-dimensional respiratory motion compensation system with ultrasound tracking technique in radiation therapy. Phys Med 2018; 49:11-8. [PMID: 29866336 DOI: 10.1016/j.ejmp.2018.04.393] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/11/2018] [Accepted: 04/17/2018] [Indexed: 12/17/2022] Open
Abstract
This study proposed respiratory motion compensation system (RMCS) combined with an ultrasound image tracking algorithm (UITA) to compensate for respiration-induced tumor motion during radiotherapy, and to address the problem of inaccurate radiation dose delivery caused by respiratory movement. This study used an ultrasound imaging system to monitor respiratory movements combined with the proposed UITA and RMCS for tracking and compensation of the respiratory motion. Respiratory motion compensation was performed using prerecorded human respiratory motion signals and also sinusoidal signals. A linear accelerator was used to deliver radiation doses to GAFchromic EBT3 dosimetry film, and the conformity index (CI), root-mean-square error, compensation rate (CR), and planning target volume (PTV) were used to evaluate the tracking and compensation performance of the proposed system. Human respiratory pattern signals were captured using the UITA and compensated by the RMCS, which yielded CR values of 34-78%. In addition, the maximum coronal area of the PTV ranged from 85.53 mm2 to 351.11 mm2 (uncompensated), which reduced to from 17.72 mm2 to 66.17 mm2 after compensation, with an area reduction ratio of up to 90%. In real-time monitoring of the respiration compensation state, the CI values for 85% and 90% isodose areas increased to 0.7 and 0.68, respectively. The proposed UITA and RMCS can reduce the movement of the tracked target relative to the LINAC in radiation therapy, thereby reducing the required size of the PTV margin and increasing the effect of the radiation dose received by the treatment target.
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Abstract
PURPOSE To investigate the changes in quality of the volumetric modulated arc therapy (VMAT) plans with couch-shift between arcs by half of a multi-leaf collimator (MLC) leaf width. METHODS A total of 22 patients with head-and-neck cancer were retrospectively selected. Since the smallest MLC leaf width was 5 mm in this study, the couch was shifted by 2.5 mm in the longitudinal-direction between arcs to increase the resolution of fluence map. A total of three types of VMAT plans were generated for each patient; the three types of plans were a two-full-arc plan without couch-shift (NS plan), a two-half-arc-pair plan with couch-shift (HAS plan), and a two-full-arc pair plan with couch-shift (FAS plan). Changes in the dose-volumetric parameters were investigated. RESULTS The FAS plan showed the best plan quality for the target volumes and organs at risk compared to the NS and HAS plans. However, the magnitudes of differences among the three types of plans were minimal, and every plan was clinically acceptable. The average integral doses of the NS, HAS, and FAS plans were 160,549 ± 37,600 Gy-cc, 147,828 ± 33,343 Gy-cc, and 156,030 ± 36,263 Gy-cc, respectively. The average monitor unit of the NS, HAS, and FAS plans were 717 ± 120 MU, 648 ± 100 MU, and 763 ± 158 MU, respectively. CONCLUSIONS The HAS plan was better than the others in terms of normal tissue sparing and plan efficiency. By shifting the couch by half of the MLC leaf width in the longitudinal direction between arcs, the VMAT plan quality could be improved.
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Affiliation(s)
- Jong Min Park
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, Republic of Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea; Robotics Research Laboratory for Extreme Environments, Advanced Institutes of Convergence Technology, Suwon, Republic of Korea
| | - So-Yeon Park
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, Republic of Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hong-Gyun Wu
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, Republic of Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea; Department of Radiation Oncology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jung-In Kim
- Department of Radiation Oncology, Seoul National University Hospital, Seoul, Republic of Korea; Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea.
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Ting LL, Chuang HC, Kuo CC, Jian LA, Huang MY, Liao AH, Tien DC, Jeng SC, Chiou JF. Tracking and compensation of respiration pattern by an automatic compensation system. Med Phys 2017; 44:2077-2095. [DOI: 10.1002/mp.12239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 03/08/2017] [Accepted: 03/19/2017] [Indexed: 11/07/2022] Open
Affiliation(s)
- Lai-Lei Ting
- Department of Radiation Oncology; Taipei Medical University Hospital; No. 252, Wu-Hsing St. Taipei 11031 Taiwan
| | - Ho-Chiao Chuang
- Department of Mechanical Engineering; National Taipei University of Technology; No. 1, Sec. 3, Chung-Hsiao E. Rd. Taipei 10608 Taiwan
| | - Chia-Chun Kuo
- Department of Radiation Oncology; Taipei Medical University Hospital; No. 252, Wu-Hsing St. Taipei 11031 Taiwan
| | - Li-An Jian
- Department of Mechanical Engineering; National Taipei University of Technology; No. 1, Sec. 3, Chung-Hsiao E. Rd. Taipei 10608 Taiwan
| | - Ming-Yuan Huang
- Department of Emergency Medicine; Mackay Memorial Hospital; Taipei 10449 Taiwan
| | - Ai-Ho Liao
- Graduate Institute of Biomedical Engineering; National Taiwan University of Science and Technology; Taipei 10607 Taiwan
| | - Der-Chi Tien
- Department of Mechanical Engineering; National Taipei University of Technology; No. 1, Sec. 3, Chung-Hsiao E. Rd. Taipei 10608 Taiwan
| | - Shiu-Chen Jeng
- Department of Radiation Oncology; Taipei Medical University Hospital; No. 252, Wu-Hsing St. Taipei 11031 Taiwan
- School of Dentistry; College of Oral Medicine; Taipei Medical University; No. 250, Wu-Hsing St. Taipei 11031 Taiwan
| | - Jeng-Fong Chiou
- Department of Radiation Oncology; Taipei Medical University Hospital; No. 252, Wu-Hsing St. Taipei 11031 Taiwan
- Department of Radiology; School of Medicine; College of Medicine; Taipei Medical University; No. 250, Wu-Hsing St. Taipei 11031 Taiwan
- Taipei Cancer Center; Taipei Medical University; No. 252, Wu Hsing Street Taipei City 110 Taiwan
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Lee JA, Kim CY, Yang DS, Yoon WS, Park YJ, Lee S, Kim YB. Four-dimensional computed tomography based respiratory-gated radiotherapy with respiratory guidance system: analysis of respiratory signals and dosimetric comparison. Biomed Res Int 2014; 2014:306021. [PMID: 25276775 DOI: 10.1155/2014/306021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/13/2014] [Accepted: 08/15/2014] [Indexed: 11/18/2022]
Abstract
PURPOSE To investigate the effectiveness of respiratory guidance system in 4-dimensional computed tomography (4 DCT) based respiratory-gated radiation therapy (RGRT) by comparing respiratory signals and dosimetric analysis of treatment plans. METHODS The respiratory amplitude and period of the free, the audio device-guided, and the complex system-guided breathing were evaluated in eleven patients with lung or liver cancers. The dosimetric parameters were assessed by comparing free breathing CT plan and 4 DCT-based 30-70% maximal intensity projection (MIP) plan. RESULTS The use of complex system-guided breathing showed significantly less variation in respiratory amplitude and period compared to the free or audio-guided breathing regarding the root mean square errors (RMSE) of full inspiration (P = 0.031), full expiration (P = 0.007), and period (P = 0.007). The dosimetric parameters including V(5 Gy), V(10 Gy), V(20 Gy), V(30 Gy), V(40 Gy), and V(50 Gy) of normal liver or lung in 4 DCT MIP plan were superior over free breathing CT plan. CONCLUSIONS The reproducibility and regularity of respiratory amplitude and period were significantly improved with the complex system-guided breathing compared to the free or the audio-guided breathing. In addition, the treatment plan based on the 4D CT-based MIP images acquired with the complex system guided breathing showed better normal tissue sparing than that on the free breathing CT.
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Lang S, Zeimetz J, Ochsner G, Schmid Daners M, Riesterer O, Klöck S. Development and evaluation of a prototype tracking system using the treatment couch. Med Phys 2014; 41:021720. [DOI: 10.1118/1.4862077] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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