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Development of the Digital Mechanical Isocenter Measuring Instrument

XU Feng,SI Jun,WANG Jun-hai,ZHANG Ke(Taian Tumor Hospital,Taian Shandong 271000,China)  
To develop a measuring equipment to detect the mechanical isocenter of radiotherapy equipment,which shows the diversion from the isocenter of the detecting equipment by the digital-display scaleplate,thus to obtain the adjusted data.The measuring accuracy is 0.01mm,which satisfies the demand that isocenter rotation error of the high accuracy radiotherapy equipment≤1mm.The device provides quality assurance(QA) for the radiotherapy equipment,also reduces treatment error,and raises radiotherapy quality.
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