Siemens Aktiengesellschaft

Wolfgang Schubert

Martin Schmidt

Juergen Leppert

Wolfgang Rossner

Christa Grabmaier

Andreas Jahnke

Hermann Boedinger

Guenter Schmitt

Walter Greschat

Friedrich Gudden

Horst Bruening

Hans J Krumme

Peter Romer

A phosphor for a high energy radiation detector is formed by a rare earth oxisulfide having the general sum formula (M.sub.1-x Ln.sub.x).sub.2 O.sub.2 S, wherein M is at least one element of the group Y, La and Gd, Ln stands for at least one element of the group Eu, Ce, Pr, Tb, Yb, Dy, Sm and Ho, and whereby (2.times.10.sup.-1).gtoreq..times..gtoreq.(1.times.10.sup.-6), which also contains molybdenum in a proportion between 10.sup.-1 and 10.sup.-6 mol percent for reducing the afterglow of the phosphor.

Phosphor having reduced afterglow and method for manufacturing same

An x-ray detector includes a scintillation element having a radiation entry side and a radiation exit side disposed in succession in a direction of radiation propagation, with respective photosemiconductor layers in optical contact with the scintillation element being disposed on both the radiation entry side and the radiation exit side of the scintillation element. The layers on each side are separated to form a succession of discrete photodiodes, and the photodiodes on one side of the scintillation element may be offset relative to the photodiodes on the other side of the scintillation element.

X-ray detector

In an exemplary embodiment, a measuring arrangement for irradiating the examination subject from different directions has a radiation source, a radiation receiver, and a computer connected to the radiation receiver for computing the attenuation values of specific image points of the irradiated body layer from the output signals of the radiation receiver. A collimator is present with a collimator grid compartment for each detector of the radiation receiver. Every detector is comprised of a scintillator crystal and a photoelectric transducer. The scintillator crystal is mounted on the surface of the photoelectric transducer such that the transducer is disposed between the associated collimator plate and the scintillator crystal. The scintillator crystal is coated, on its surface, with the exception of the surface confronting the photoelectric transducer, with an optical seal which can be light-reflecting on its side resting against the scintillator crystal.

Diagnostic radiology apparatus for producing layer images of an

Self-supporting luminescent screens made by applying a releasing agent to the surface of a mechanical supporting structure, having the desired shape, which agent is bound with a binding substance that is volatile at the evaporating temperature of a luminescent screen material, the latter being then deposited in a layer by evaporation onto the prepared supporting surface, until the deposited screen layer reaches a desired thickness, and eventually separating and removing the produced luminescent screen from the supporting structure.

Self-supporting luminescent screens

An X-ray image amplifier or intensifier and, more particularly, an input screen for electron-optical image intensifiers having a phosphorescent or luminescent layer supported on a carrier, which is followed by a photocathode layer, and wherein a dark-colored intermediate layer is located between the luminescent layer and the photocathode layer. The darkly-colored layer employed between the luminescent layer and the photocathode layer is constituted of an at least approximately uniform surface coating of carbon or graphite facilitating the partial transmission of the light from the luminescent layer.

Growing community of inventors

Erlangen, Germany

Wolfgang Schubert