【摘要】 文章介绍了用光学信息论的熵方法，在固定条件下，通过定量计算同一被摄物，在散乱射线不同的情况下，ｘ射线照相底片的信息量。而有效地评价散乱射线对底片象质影响。更多还原

【Abstract】 The paper presents how to learn how much information X - ray negative film carries by usingthe method of entropy in optical information theory , under the fixed condition, through the quantitivecalculation of the same shot subject and under the condition of different random rays, so that the effect ofrandom ray on negative image quantity can be assessed effectively.更多还原