A method and apparatus for processing a frontal chest radiograph in a radiographic image copying system in which an original radiograph is scanned with a scanning light beam and the light transmitted through the radiograph is detected by a photodetector which gives an output to be processed and used...http://www.google.es/patents/US4306290?utm_source=gb-gplus-sharePatente US4306290 - Image gradation processing method and apparatus for radiographic image copying system
Image gradation processing method and apparatus for radiographic image ...
