Acceptance testing for MR simulator: guideline-based practice and result analysis(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2024年第10期
- Page:
- 1199-1205
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Acceptance testing for MR simulator: guideline-based practice and result analysis
- Author(s):
- YUAN Cuiyun1; CHEN Xinyuan2; LIU Chenbin1; LI Yang1; QUAN Enzhuo1; DAI Jianrong2
- 1. Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen 518116, China 2. Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
- Keywords:
- Keywords: magnetic resonance simulator acceptance testing 3.0T magnetic resonance radiotherapy
- PACS:
- R318；R811.1
- DOI:
- DOI:10.3969/j.issn.1005-202X.2024.10.002
- Abstract:
- Abstract: Objective Magnetic resonance simulator (MR Sim) is a novel type of simulation equipment utilized in radiotherapy. Acceptance testing is an essential quality assurance procedure prior to the clinical use of the MR Sim. The report provides the detailed procedures and result analysis of acceptance testing for an MR Sim. Methods The acceptance testing scheme was developed following the recently published AAPM TG284 report and the NCC/T-RT 002-2023 guidelines. Quality control equipments such as ACR (American College of Radiology) large phantom and geometric distortion measurement phantom were used for evaluating various aspects of the MR Sim, including the effectiveness of shielding, the functionality of imaging system, the image quality, the performance of radio frequency coils, the geometric accuracy of large field imaging, the precision of external laser markings, the couch movement accuracy, and the image transmission accuracy. Results The shielding effectiveness at a frequency of 150 MHz exhibited an average value of 105 dB. All of 8 image quality indices, namely geometric accuracy, slice position accuracy, slice thickness accuracy, image uniformity, artifact ratio, signal-to-noise ratio, high-contrast spatial resolution, and low-contrast resolution, fell within recommended tolerances. The maximum geometric distortion observed across a 25 cm field of view was less than 2 mm. The errors in external laser markings and couch movement accuracy were both less than 1 mm. The couch levelness was less than 1°. Both radio frequency coils and image transmission passed the required tests. Conclusion MR Sim is high-precision and complex. To ensure its precise application in radiotherapy, the acceptance testing for an MR Sim should be meticulously designed and executed following the established guidelines and accounting for its unique performance characteristics.
Last Update: 2024-10-29