当使用配有电视监视系统的 EDR—750BX 线机进行胃肠点片摄影时,偶有出白片而不能当即被医师所察觉。据了解,这是该机较为普遍存在的一个问题。有一次,我们仅在半天的使用中就断续地出了四张白片。结果是浪费了胶片,延误了诊断,给病人增加了往返检查的麻烦。我们认为,故障的原因是元件性能不稳定,致使 KV 数控电路出现程序混乱而造成的。当这部分 When using the EDR-750BX line with a television monitoring system for gastrointestinal spot photography, occasional white patches were not immediately apparent to the physician. It is understood that this is a more common aircraft problem. Once, we only made four white pieces intermittently during the half-day use. The result was a waste of film, a delay in diagnosis, and increased inconvenience to patients for round trips. In our opinion, the cause of the malfunction is the unstable performance of the components, resulting in chaos in the KV NC circuit. When this part