|Table of Contents|

Quality assurance of medical accelerators using VMAT technology based on 3D semiconductor detector array ArcCHECK

Journal Of Modern Oncology[ISSN:1672-4992/CN:61-1415/R]

Issue:
2024 02
Page:
308-315
Research Field:
Publishing date:

Info

Title:
Quality assurance of medical accelerators using VMAT technology based on 3D semiconductor detector array ArcCHECK
Author(s):
DENG Jia1; 2; LIU Shengyan3; HUANG Yun4; ZHAO Yaolin2; WU Xiangyang1
1.Department of Radiation Oncology，Shaanxi Province Cancer Hospital，Shaanxi Xi'an 710061,China;2.School of Nuclear Science and Technology,Xi'an Jiaotong University,Shaanxi Xi'an 710049,China;3.Yulin Xingyuan Hospital,Shaanxi Yulin 719000,China;4.Xianyang Central Hospital,Shaanxi Xianyang 712000,China.
Keywords:
VMAT; IMRT; Machine QA; ArcCHECK
PACS:
R730.55
DOI:
10.3969/j.issn.1672-4992.2024.02.020
Abstract:
Objective:To optimize the clinical outcomes of tumor radiotherapy by utilizing the ArcCHECK semiconductor detector to assess the quality control of VMAT technology in medical accelerators.Methods:The ArcCHECK cylindrical semiconductor radiation detector's three-dimensional array was employed with specific dose irradiation techniques.The measured results were used to calculate deviations in gantry isocenter,MLC positioning,and beam flatness symmetry.Dose deviations were correlated with mechanical performance.The experimental results were compared and monitored against routine daily and monthly tests for 12 months.The sensitivity to radiation beam was also evaluated to enhance accelerator radiation monitoring efficiency and accuracy.Results:The gantry isocenter deviation was 0.292 mm±0.016 mm,with an average gantry speed of 3 degrees/second and an average maximum speed deviation of approximately 0.1 degrees/second.The average maximum MLC deviation was 0.392 mm±0.049 mm.The average beam flatness symmetry was 105.55%±0.13%,and the X and Y-axis symmetries were 101.02%±0.21% and 101.11%±0.21%,respectively.The 12-month continuous measurements showed consistent trends with independently verified results.Conclusion:Leveraging the advantages of the ArcCHECK cylindrical semiconductor detector array,it provides a comprehensive measurement approach for VMAT quality control,serving as a means for medical accelerator radiation detection and quality assurance.

References:

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Memo

Memo:
陕西省卫生健康科研基金项目（编号：2022D037）
Last Update: 1900-01-01