Abstract: A planar image detector for electromagnetic radiation has radiation-sensitive pixel elements arranged in a matrix that has a surface with active pixels for imaging and a surface with correction pixels, not exposed to the radiation for generating correction signals, and with contact surfaces next to the surfaces with the pixels. The surface with the correction pixels is arranged in a different plane from the surface with the active pixels and at one of the sides of the image detector with the contact surfaces of the active pixels.

Abstract: X-ray diagnostic installation has a high-voltage generator for an X-ray tube for generating an X-ray beam, an X-ray image converter that has a scintillator layer and a semiconductor layer with light-sensitive pixel elements arranged in a matrix, and a combined back light/dose measuring unit arranged therebehind in the beam direction that is formed by an array of light-emitting diodes arranged in a matrix, as backside illumination, and light-sensitive sensors that acquire the X-ray dose, as sensors, and a measurement transducer for the control of the high-voltage generator connected thereto. Light waveguides are arranged in front of the light-sensitive sensors and between the light-emitting diodes, these light waveguides conducting the light that proceeds from the X-ray image converter during the irradiation and that is incident onto the combined back light/dose measuring unit onto the light-sensitive sensors.

Abstract: X-ray diagnostic installation has a high-voltage generator for an X-ray tube for generating an X-ray beam, an X-ray image converter that has a scintillator layer and a semiconductor layer with light-sensitive pixel elements arranged in a matrix, and a combined back light/dose measuring unit arranged therebehind in the beam direction that is formed by an array of light-emitting diodes arranged in a matrix, as backside illumination, and light-sensitive sensors that acquire the X-ray dose, as sensors, and a measurement transducer for the control of the high-voltage generator connected thereto. Light waveguides are arranged in front of the light-sensitive sensors and between the light-emitting diodes, these light waveguides conducting the light that proceeds from the X-ray image converter during the irradiation and that is incident onto the combined back light/dose measuring unit onto the light-sensitive sensors.

Abstract: Filter (3) for absorbing X-rays (2), having a controllable field-generating matrix arranged on a housing (7). The matrix generates electric or magnetic fields acting on liquids (13, 14) located in the housing. The housing (7) has at least one first and one second chamber (9, 10) which are separated in a sealed fashion from one another by means of a flexible diaphragm (8). The first and second liquids (13, 14) are located in the first and second chambers (9, 10) respectively, and differ in their X-ray absorption characteristics. At least one of the liquids is a magneto-rheological or an electro-rheological liquid, depending on the type of matrix provided. In operation, a minimum pressure is applied to at least one of the liquids, and the localized fields produced by the matrix cause the liquids (13, 14) to alter their respective thickness ratios, to provide a an X-ray filter having location-specific absorption characteristics.