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应用了限、集、屏的防护手段,系统改装了1980年前产品X线机14台。为进一步探讨该装置各层次防护关系,对上海产F-Ⅱ型30mAX线机2台,用XS—4型X射线巡视仪,对机体各层次点位进行改进后效果测定分析。 首先,在出线口处,用古钱式(内方外圆)2mm铅板加在铝片上面,内方径以荧屏边1cm无光区为宜,外圆径与原铝片等大,铝滤过板加厚至1.5mm,做成限线装置。测试表明,最高点位800mm时,照射量率降低率为25％,平均降低为
The application of limited, set, screen protection means, the system modified the product before 1980 X ray machine 14. In order to further explore the protective relationship at all levels of the device, Shanghai F-Ⅱ type 30mAX line 2 sets of machines, with XS-4 X-ray X-ray patrol apparatus, the body points at all levels to improve the effect of measurement analysis. First of all, at the outlet, with ancient money style (inside the outer circle) 2mm lead plate added to the aluminum sheet, the inner diameter of the screen to 1cm matte zone is appropriate, the outer diameter of the original aluminum and other large, aluminum Filter plate thickened to 1.5mm, made of limit device. Test showed that the highest point of 800mm, the rate of radiation reduction rate of 25%, an average reduction of