1射线照相缺陷“读谱”前期准备1.1观片灯射线照相底片必须满足现行法规标准对黑度和灵敏度及标记标识等自身质量要求。为能有效观察射线底片,应使用高强光的观片灯。市售观片灯式样很多,按观片灯屏形状,一般分4种:点式,面式,条式及点面组合式。观片灯须设有强冷风机,以散发观察高黑度底片所需强光源产生的热量。大多数观片灯使用1个 1 radiographic defects “Reading Spectrum ” Preparation 1.1 Viewing film radiographic film must meet the current regulatory requirements of the blackness and sensitivity and marking their own quality requirements. In order to be able to effectively observe the radiation film, should use high-intensity light film viewer. A lot of the concept of commercial watchable lights, by watching the shape of the light screen, generally divided into 4 kinds: point type, surface type, bar and point combination. The film viewer shall be equipped with a forced cooling fan to dissipate the heat generated by the intense light source required to observe the high-density film. Most watcher lights use one