Abstract
It is known that physical system characteristics affecting radiographic image quality are configurated in sharpness, granularity and characteristic curve. In this paper, we pointed out to the radiographic mottle ; it is the dominant factor which affects radiographic image quality in the high sensitivity system like a image intensifier photofluolography. And we evaluated radiographic image quality from the data of granularity which derived from Wienner spectrum and Root Mean Square granlarity, for getting better radiographic image quality on concerning dose reduction.
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