Metal Foil Sandwiched Multiple Radiography

E. Takenaka; M. Hatori

doi:10.1117/12.934500

1 November 1982 Metal Foil Sandwiched Multiple Radiography

E. Takenaka, M. Hatori

Proceedings Volume 0372, Physics and Engineering in Medical Imaging; (1982) https://doi.org/10.1117/12.934500
Event: International Workshop on Physics and Engineering in Medical Imaging, 1982, Pacific Grove, United States

Abstract

A new method to obtain simultaneously two or three radiographs with a wide dynamic range was studied. This is to divide the transmitted X-ray energy spectra through a human body into lower and higher parts than K absorption edge by a metal foil (Pb, Ta, Gd) and give radiographs using two or three pairs of an one-side coated film and an intensifying screen. The backward film has the informations filtered by the metal foil. The forward film before the metal foil, if the film density is same, relatively contains the informations of lower parts of the transmitted X-ray spectra through a human body. Secondly, a metal foil can make shadows of thin parts and thick parts of a human body displace on high region of film, respectively and separatedly. These radiographs of thin parts were useful to be observed superposing two films with a wide dynamic range. As to thick parts it was useful to view two films hanging side by side. This technique was appreciated to be applied to the organs such as extremities, knee and elbow, head and neck, lung and etc.

Citation Download Citation

E. Takenaka and M. Hatori "Metal Foil Sandwiched Multiple Radiography", Proc. SPIE 0372, Physics and Engineering in Medical Imaging, (1 November 1982); https://doi.org/10.1117/12.934500

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