27 July 1979 Expression De La Resolution D'une Image Radiographique Par Une Formule Simple
Author Affiliations +
Proceedings Volume 0189, 13th Intl Congress on High Speed Photography and Photonics; (1979) https://doi.org/10.1117/12.957607
Event: 13th International Congress on High Speed Photography and Photonics, 1978, Tokyo, Japan
Abstract
We propose to set in an easy formular every element of an X-Ray device : - X-Ray source, - X-Rayed body, - The receipt apparatus. We are then obliged to set a nomber of simplifying hypothesis : - The radiation energy is the same for every calculation, - The source is supposed to be pin-pointed and isotropic. To caracterize the details at the level of the X-Rayed object we introduce the notion of "object contrast". The reception system is defined by a gain conversion which expresses the probability of an X-photon unabsorbed by the body, proving at least one recorded event. Statistical considerations allow us to calculate the minimum surface of the detail to identify must have. This minimum, inverse resolution of the whole X-Ray apparatus, varies according to the number of photons provided by the source, the way the object modulates the beam, and the conversion gain of the reception system. For exemple, at a given energy - we can show that the resolution is maximum when this object has an optical thickness twice the mean pathlength of the radiation.
© (1979) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guy Bourdarot, Guy Bourdarot, "Expression De La Resolution D'une Image Radiographique Par Une Formule Simple", Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957607; https://doi.org/10.1117/12.957607
PROCEEDINGS
3 PAGES


SHARE
RELATED CONTENT

Technologies pour les microlasers et la micro-optique
Proceedings of SPIE (April 02 2018)
Laser Safety
Proceedings of SPIE (March 25 1984)
Use Of A C.C.D. Array In An X Ray Pinhole...
Proceedings of SPIE (January 31 1985)

Back to Top