US 4,554,453 A · Apparatus for recording X-ray images

Abstract

The invention relates to an apparatus for the taking of X-ray pictures, where there are between two radiation-transmitting electrodes two solid substance layers whose free sides lie in a charge storage layer. The first electrode is a photo-conducting layer which is impinged upon by image rays, while the second electrode is a photo-conducting layer which is impinged upon by an optical ray moved in a scanning raster, so that a reproducible signal is obtained. According to the invention, the time required per image is reduced and increased quantum yield is achieved at increased signal-to-noise ratio and greater dynamic range. There is correlated to the first photo-conducting layer a luminophor which transforms the image rays into light which is preferentially absorbed in this layer. An apparatus according to the invention is usable in particular in medical radio-diagnostics.

Claims12

Dependent claims

An improvement to a solid image recording system of the type which contains first and second radiation-transmitting electrodes, first and second photoconducting layers each contacting a corresponding one of the electrodes, and a central charge-storing layer which is disposed between the photoconducting layers and which contacts both of them, wherein the first photoconducting layer is impinged by image rays and the second photoconducting layer is impinged by an optical ray moved in a scanning raster, the improvement comprising a luminophor which is associated with the first photoconductive layer and transforms the image rays into light which is preferentially absorbed in the first photoconductive layer, the luminophor being located outside any electric field existing between the electrodes.

Dependencies are inferred from the claim text.

Apparatus for recording X-ray images

Life of this patent

Apparatus for recording X-ray images

Life of this patent

Abstract

Claims12