一台KB500型X光机中的DTA-2摄影装置(西南医用设备厂生产)在滤线摄影时,摄出的X光片上呈较密的栅状密度增高影,且影像清晰度很差。怀疑为滤线器铅条影,故而用手触摸摄影床下滤线器(在暗盒夹上方),并在滤线器摄影挡空曝光一次,发现滤线器根本没有动作,因此,基本确定故障发生在滤线器。检修时切断电源,将摄影床一端的2个挡块拆下, The DTA-2 camera (manufactured by Southwestern Medical Equipment Factory) in a KB500 X-ray machine showed a dense grid-like density increase with poor sharpness of the image on the X-ray film. Suspected to be the filter lead film, so touch the camera under the bed filter (at the top of the cassette clip), and blind exposure in the filter photography once, found that the filter did not move, so basically determine the fault occurred In the filter. Cut off the power supply when the inspection, the photographic bed end of the two blocks removed,