Abstract: A method of manufacturing a collimator mandrel having variable attenuation characteristics is presented. The manufacturing process includes the placement of a layer of attenuating material on a core of base material. The layer of attenuating material is relatively thin and varies in thickness circumferentially around the core. The collimator mandrel may be manufactured by placing a cast about a core of non-attenuating material, filling a void between the cast and the core with an attenuating material, allowing the material to cure, and removing the cast from the assembly.

Abstract: A contrast phantom for assessing the characteristic, exposure-related signal and noise response and dynamic range of an image recording and detection system. The contrast phantom is composed of an absorber medium having a sudden K-edge absorption change of the mass attenuation coefficient for at least one photon energy level in-between the mean and maximum energies of the lowest energy spectrum it is subjected to. The invention further provides a method for assessing the characteristic, exposure-related signal and noise response and dynamic range of an image recording and detection system with the aforementioned contrast phantom.

Abstract: A modular X-ray diagnostic appliance has as a first module, a base support, as second module, at least one support for the base support, as a third module, at least one component of an X-ray imaging device, as a fourth module, a support device for an object to be examined, and, as a fifth module, a longitudinal carriage which is arranged above the base support and on which the component is mounted. The base support has support-device coupling elements for coupling the support device thereto, support-coupling elements for coupling the support thereto and component-coupling elements for coupling the component thereto. The component-coupling elements have a fixed and/or floating bearing arranged on the base support and connected to the longitudinal carriage. In a method for producing different series of X-ray diagnostic appliances, in which a structurally identical modular base support and a structurally identical modular support device are used for all series.

Abstract: A cooling device for an X-ray source arranged at a gantry rotatable around a rotational axis has a ring-like heat exchanger that is arranged at the gantry and is thermally conductively connected to the X-ray source. The cooling device is useable in a computed tomography apparatus having the X-ray source.

Abstract: A solid state radiation detector 20 is formed by stacking a first electrode layer 21, a recording photoconductive layer 22, a charge transfer layer 23, a reading photoconductive layer 24, and a second electrode layer 26 having a stripe electrode 26 consisting of main elements 26a, in the recited order. A large number of secondary elements 27a, for outputting an electrical signal which has a level proportional to a quantity of latent image charge stored in a charge storage portion 29 formed in the interface between the recording photoconductive layer 22 and the charge transfer layer 23, are provided so that the main and secondary elements are alternately arranged in parallel to one another.

Abstract: A light detection equipment in a component with at least one optical access includes a light conveyor having a first terminal part faced inside the component through an optical access. The first terminal part is formed by a spherical cap collecting the light arriving from any angle inside the component. The light conveyor has a second terminal part with a surface faced and substantially in contact with a sensitive element of an optical transducer.

Abstract: The present invention is a method and apparatus for calculating the amount and composition of inorganic material in a sheet material. The apparatus of the present invention is capable of calculating the composition of all the additives at once without requiring multiple cycles. The apparatus uses a combination of two techniques, namely an X-ray fluorescence analysis and a preferential X-ray absorption analysis. X-ray fluorescence is measured by a thermoelectrically cooled solid state detector. The apparatus can measure more than three additives. Measurement of argon in the air is used for compensation of electronic drift. An empirical correction is used to compensate for mutual interaction between X-ray fluorescence radiation and clay or talc. The measurement is compensated for dust accumulation by fluorescing the dust.