The Application Effect of ArcCHECK Machine QA Tool in Quality Assurance of Medical Linear Accelerator
Objective To explore the application effect of ArcCHECK Machine QA tool in quality assurance of medical linear accelerator.Methods The ArcCHECK Machine QA tool and ArcCHECK body model were used to test the performance of the medical linear accelerator,including the angle of the gantry,the rotation speed of the gantry,the rotation center of the gantry,the consistency of the position of the multi-blade collimator and the lead gate,and the flatness and symmetry of the gantry when rotating out the beam,to evaluate the application effect of this tool in medical linear accelerator quality assurance.Results In rotation mode,the average rotation speed of the gantry was 3.6 deg/s,and the maximum deviation was about 0.5 deg/s;The average radius formed by the isocenter of the gantry rotation was 0.4 mm,and the average positive and negative difference of the maximum distance between the multileaf collimator and the lead gate were 0.7 mm and-0.7 mm,respectively.The flatness in the Y direction was 1.8%,the symmetry in the Y direction was 1.1%,and the symmetry in the X direction was 4.3%in the rotating beam out mode.Conclusion ArcCHECK Machine QA tool can be used for medical linear accelerator beam performance quality assurance in intensity modulated radiotherapy and volumetric modulated arc therapy.
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