X-ray imaging device
First Claim
1. A device for the conversion of images into electrical signals comprising, firstly, a matrix arrangement of photosensitive elements formed on an insulating substrate and, secondly, a scintillating substance, wherein said scintillating substance is interposed between said substrate and the matrix of photosensitive elements, said matrix being formed as a non-self-supporting superposition of patterned layers deposited on the substrate and wherein an insulating planarization layer is interposed between the scintillating substance and the deposited layers of the matrix.
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Accused Products
Abstract
The disclosure concerns devices for the conversion of images into electronic signals with particular application to X-ray imaging. Instead of forming, on an insulating glass substrate, a strip or matrix of photosensitive elements (PIN diodes) which are then coated with a scintillating sheet bonded to or pressed against the upper surface of the photosensitive elements, a scintillating layer is deposited on the substrate before forming the photosensitive elements. Thus, a gain in sensitivity and definition is achieved. It is moreover possible to preserve, in addition to the scintillating layer deposited between the substrate and the photosensitive elements, a scintillating layer bonded to or pressed against the upper surface of the unit. The two scintillators may be identical or different in nature. If they are different, they may react to different wavelengths but may also emit in different wavelengths.
75 Citations
8 Claims
- 1. A device for the conversion of images into electrical signals comprising, firstly, a matrix arrangement of photosensitive elements formed on an insulating substrate and, secondly, a scintillating substance, wherein said scintillating substance is interposed between said substrate and the matrix of photosensitive elements, said matrix being formed as a non-self-supporting superposition of patterned layers deposited on the substrate and wherein an insulating planarization layer is interposed between the scintillating substance and the deposited layers of the matrix.
- 6. A device for the conversion of images into electrical signals comprising, firstly, a photosensitive detector formed on an insulating substrate and, secondly, a first scintillating layer, wherein said first scintillating layer is interposed between said substrate and the detector, and further comprising another scintillating layer bonded to or pressed against the upper surface of the photosensitive detector.
Specification