Radiographic system with improved image quality

G - Physics – 03 – C

Patent

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G03C 5/17 (2006.01) C09K 11/77 (2006.01) G21K 4/00 (2006.01)

Patent

CA 2094294

A wide latitude, high resolution radiographic system having a relative speed of at least 150 and a contrast transfer function of at least 0.30 when measured at 6 line pairs per millimeter, comprises at least one X-ray intensifying screen in operative association with a photosensitive silver halide element having a maximum contrast of less than or equal to 3.0 produces superior images, particularly chest images over a wide range of exposures, without the decrease in image quality or contrast normally seen in wide latitude systems.

Système radiographique haute résolution, à grande marge d'exposition possédant une vitesse relative égale à au moins 150 et une fonction de transmission de contraste égale à au moins 0,30 lorsqu'on effectue la mesure au niveau de 6 raies jumélées par millimètre, comprenant au moins un écran renforçant les rayons X associé en mode de fonctionnement à un élément photosensible à l'halogénure d'argent présentant un contraste maximum inférieur ou égal à 3,0. Ce système permet de produire des images de qualité supérieure, plus particulièrement des images du thorax sur une large plage d'expositions sans diminuer la qualité d'image ou le contraste comme cela se produit habituellement avec les systèmes à grande marge d'exposition.

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