Abstract: Device for capturing structural data of an object To simplify the reconstruction of structural data of an object (7) examined using a tomography device (1), it is proposed to implement a radiation source (4) in such a way that radiation bundles (6) with parallel beam geometry are produced.

Abstract: A method for controlling a computed tomography scanner for producing projections of a measurement object is proposed, in which the projections are used to create images of the measurement object. The method has comprises specifying a set-point value (&sgr;set-point) for a factor (&sgr;(I)) that is characteristic of a quality of the projections to be produced; determining an actual value of the factor (&sgr;(I)) that is characteristic of the quality of the particular projection produced by the computed tomography scanner between the productions of successive projections; and regulating the primary intensity (I0) of an X-ray source of the computed tomography scanner, between the productions of successive projections, such that the actual value for the characteristic factor (&sgr;(I)) of each of the projections produced by the computed tomography scanner is kept at the specified set-point value (&sgr;set-point). A computed tomography scanner that is suitable for performing the method is also disclosed.

Abstract: The functional dependency of a first X-ray absorption value of density and atomic number is determined in the instance of a first X-ray spectrum, and at least the functional dependency of a second X-ray absorption value of density and atomic number is determined in the instance of a second X-ray spectrum. Based on a recording of a first distribution of X-ray absorption values of the object to be examined in the instance of a first X-ray spectrum, and on a recording of at least one second distribution of X-ray absorption values of the object to be examined in the instance of a second X-ray spectrum, the values for density and atomic number are determined by comparing the functional dependency of a first X-ray absorption value of the first distribution of X-ray absorption values with the functional dependency(ies) of the X-ray absorption values, which are assigned to the first X-ray absorption value, of the second and/or other distributions of X-ray absorption values.

Abstract: According to the present invention, a method for controlling a computed tomography scanner for producing projections of a measurement object is proposed, in which the projections are used to create images of the measurement object. The method has comprises specifying a set-point value (&sgr;set-point) for a factor (&sgr;(I)) that is characteristic of a quality of the projections to be produced by the computed tomography scanner; determining an actual value of the factor (&sgr;(I)) that is characteristic of the quality of the particular projection produced by the computed tomography scanner between the productions of successive projections; and regulating the primary intensity (I0) of an X-ray source of the computed tomography scanner, between the productions of successive projections, such that the actual value for the characteristic factor (&sgr;(I)) of each of the projections produced by the computed tomography scanner is kept at the specified set-point value (&sgr;set-point) .

Abstract: An X-ray imaging apparatus for determining image data about the distribution of physical and chemical constituents in examination subjects of a human or animal nature or in materials or security inspection, a tube-side modification of a conventional CT apparatus to allow a two-spectra method to be employed but without an increase in the radiation stress on the subject. A two-part filter is introduced between the X-ray source and the subject to produce X-rays of at least two different intensities for transirradiating the subject.

Abstract: A current-limiting device contains at least one conductor track including high Tc superconductor material, on a support body. The conductor track is provided with a cover layer including an insulating plastic material, which includes a filler which increases the thermal conductivity. The thickness of the cover layer is greater than the thickness of the conductor track.

Abstract: A printed circuit board arrangement with a flexible layer arrangement of at least one electrically conductive layer with a large number of conductor tracks lying next to one another and surrounded by electrically isolating layers has at least one printed circuit board firmly connected to a portion of the flexible layer arrangement and accommodating a component. To form a connection between the component and the conductor tracks of the flexible layer, an opening through the printed circuit board to the conductor tracks is provided, which opening may be stepped, so that different conductor tracks and different layers can be reached.

Abstract: A current limiting device includes a substrate or carrier body at least partially formed of electrically insulating material. At least one printed conductor configuration formed of high Tc superconductive material is disposed on the substrate or carrier body and has end pieces for establishing contact. The printed conductor configuration has a number of partial conductors which are connected in parallel between their end pieces and have at least approximately the same conductor length. A method for producing the device includes forming the printed conductor configuration by structuring a corresponding layer.

Abstract: The resistive current limiter contains an electrically insulating support body and at least one conductor track structure arranged thereon and having a conductor track made of high-Tc superconductor material. The conductor track has straight and curved conductor track segments. A maximum radii ratio v of 7 (v=ra/ri where ra=external radius, ri=internal radius) is to be maintained for the curved conductor track segments. The conductor track is advantageously patterned from a layer which is made of the high-Tc superconductor material and is applied on the support body.

Abstract: The resistive current limiter contains an electrically insulating support body and at least one conductor track structure arranged thereon and having a conductor track made of high-Tc superconductor material. The conductor track has straight and curved conductor track segments. A maximum radii ratio v of 7 (v=ra/ri where ra=external radius, ri=internal radius) is to be maintained for the curved conductor track segments. The conductor track is advantageously patterned from a layer which is made of the high-Tc superconductor material and is applied on the support body.

Abstract: A current limiting device includes a substrate or carrier body at least partially formed of electrically insulating material. At least one printed conductor configuration formed of high Tc superconductive material is disposed on the substrate or carrier body and has end pieces for establishing contact. The printed conductor configuration has a number of partial conductors which are connected in parallel between their end pieces and have at least approximately the same conductor length. A method for producing the device includes forming the printed conductor configuration by structuring a corresponding layer.