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Title: National survey of patient specific IMRT quality assurance in China
Authors: Pan, Y
Yang, R
Zhang, S
Li, J
Dai, J
Wang, J
Cai, J 
Keywords: IMRT
National survey
Patient-specific QA
Issue Date: 2019
Publisher: BioMed Central
Source: Radiation oncology, 2019, v. 14, no. 1, 69 How to cite?
Journal: Radiation oncology 
Abstract: Background: To analyze and present the China's national survey on patient-specific IMRT quality assurance (QA). Methods: A national survey was conducted in all radiotherapy centers in China to collect comprehensive information on status of IMRT QA practice, including machine, technique, equipment, issues and suggestions. Results: Four hundred and three centers responded to this survey, accounting for 56.92% of all the centers implementing IMRT in China. The total number of medical physicists and the total number of patients treated with IMRT annually in these centers was 1599 and 305,000 respectively. All centers implemented measurement-based verification. Point dose verification and 2D dose verification was implemented in 331 and 399 centers, respectively. Three hundred forty-eight centers had 2D arrays, and 52 centers had detector devices designed to measure VMAT beams. EPID and film were used in 78 and 70 centers, respectively. Seventeen and 20 centers used log file and 3D DVH analysis, respectively. One hundred sixty-eight centers performed measurement-based verification not for each patient based on different selection criteria. The techniques and methods varied significantly in both point dose and dose distribution verification, from evaluation metrics, criteria, tolerance limit, and steps to check failed IMRT QA plans. Major issues identified in this survey were the limited resources of physicists, QA devices, and linacs. Conclusions: IMRT QA was implemented in all the surveyed centers. The practice of IMRT QA varied significantly between centers. An increase in personnel, QA devices and linacs is highly desired. National standard, guideline, regulation and training programs are urgently needed in China for consistent and effective implementation of IMRT QA.
EISSN: 1748-717X
DOI: 10.1186/s13014-019-1273-5
Rights: © The Author(s). 2019 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver
The following publication Pan, Y., Yang, R., Zhang, S., Li, J., Dai, J., Wang, J., & Cai, J. (2019). National survey of patient specific IMRT quality assurance in China. Radiation Oncology, 14(1), 69. is available at
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