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《China Medical Equipment》 2015-01
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Performance test and quality assurance of Truebeam~(TM)

HUANG Bao-tian;Department of Radiation Oncology,Cancer Hospital of Shantou University Medical College;  
Objective: To set up the procedures of performance test and quality assurance of TruebeamTM by measuring the mechanical parameters, field parameters, imaging isocenter and respiratory gating systems. Methods: Utilize level and graph paper to test the mechanical parameters; Utilize the film, 3D water tank and dosimeter to measure the corresponding field parameters; Utilize Isoc Cal phantom to test the shift of imaging isocenter and to use dosimeter to verify the beam on accuracy of respiratory gating systems. Results: All of the tested mechanical parameters were within the tolerance. The coincidence of light field and radiation field was less than 1.2 mm. The flatness was less than 105% except for the flattening filter free beam and the symmetry was less than 102%. The absolute dose error was less than 1%. The shift of imaging isocenter was less than 3 mm and the dose error was within 0.5‰ when the respiratory gating function was implemented. Conclusion: TruebeamTM possesses superior mechanical performance and is very suitable to carry out complicated radiotherapy techniques.
【CateGory Index】: R197.39
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