Assessment of Radiographic Granularity by a Single Number
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概要
- 論文の詳細を見る
The granularity of radiographic screen-film systems is assessed by a single number in terms of the entropy method. This method is evaluation on the basis of the precision of measurements, and in the present paper the precision is directly related to radiographic granularity which refers to both RMS granularity (the standard deviation of density fluctuations) and film contrast (the gradient of H & D curve). From the results of entropy calculations, the ability of transmission of radiographic images in two screen-film systems is obtained by comparing the values of transmitted information or the relative efficiency of transmission.
- 社団法人応用物理学会の論文
- 1980-07-05
著者
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Uchida S
Nagasaki Resarch & Development Center Mitsubishi Heavy Industries Ltd.:(present Address) Nagasak
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Uchida Suguru
Department Of Electrical Engineering Faculty Of Engineering Gifu University
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Fujita Hiroshi
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
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