Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Other

Friedrich-alexander-universitat Erlangen-nürnberg

Technische Universitat Ilmenau

Randolf Hanke

Giovanni Del Galdo

Peter Schmitt

Theobald Fuchs

Tobias Schoen

Michael Maisl

Guenther Kostka

Oliver Schreck

Ulf Hassler

Norbert Bauer

Dietrich Paulus

Hartmut Gemmeke

Norman Uhlmann

Stefan Hiermaier

Nicole Ruiter

Frank Nachtrab

Stefan Kasperl

Michael Salamon

Siegfried Nau

Tobias Schön

Torsten Hopp

Michael Zapf

Ines Butz

Frank Sukowski

Rolf Behrend

Malte Kurfiss

Stefan Moser

Jens Fritsch

G&uuml;nther Kostka

Werner BÄHR

Bernd Valeske

Florian RÖMER

Alexander Ihlow

Ahmad Osman

Susanne Burtzlaff

Stefan Schröpfer

Heinz Gerhäuser

Thomas Wenzel

Ashley Stone

An example of a method for time-resolved calculation of a deformation of a body comprises calculating () a model of the body during the deformation. The method further comprises calculating () a predicted X-ray image for the body for a plurality of time points during the deformation based on the model. The method further comprises obtaining () one measured X-ray image of the body each for the time points during the deformation. The method further comprises modifying () the model based on the predicted X-ray images and the measured X-ray images.

Method and computer program for time-resolved calculation of a deformation of a body

A multi-dimensional representation of an object is obtained in that first and second pictures of the object illuminated using an X-ray source are created using a sensor that is located, in relation to the X-ray source, behind the object in a preferential direction defined by the relative positions of the object and of the sensor. A distance in the preferential direction between the X-ray source and the object is different in the first picture than in the second picture. The multi-dimensional representation of the object is obtained by combining the first and second pictures.

Apparatus and method for non-rotational computer tomography

In an X-ray computer tomograph and a method for examining a component by means of X-ray computer tomography, the component carries out a movement relative to a radiation source detector unit in at least two degrees of freedom of movement, so at least one trajectory can be produced which spans a three-dimensional space. Since the X-radiation has a three-dimensional radiation geometry, volume data can be rapidly obtained and precisely reconstructed to form a three-dimensional X-ray image. The component can be geometrically measured by means of a geometry detection unit.

X-ray computer tomograph and method for investigating a component by means of X-ray computer tomography

A device for the contactless detection of a potentially existing essentially edge-free irregularity in a convex surface, which has a structuring that is delimited by edges, comprises a unit for creating a three-dimensional representation of the surface, a unit for extracting the convexity from the three-dimensional representation of the surface and for smoothing the edges of the structuring so as to obtain a convex-free representation of the convex surface which exhibits the irregularity and the structuring, whose edges have now been smoothed, a unit for comparing the convex-free representation with a threshold value so as to identify areal regions of the convex-free representation which are determined by a predetermined relationship to the threshold value, and a unit for analyzing the areas of the identified regions, a region being detected as an irregularity if its area exceeds a predetermined area. When this device is used to carry out quality control of tires, bulges or constrictions can therefore be identified with certainty in real-time operation and can be distinguished from an inscription or marking which has been intentionally provided on the tire.

Detection of irregularities in a convex surface, such as a tire sidewall, using band-pass filtering

An arrangement for reading photo-stimulable storage luminescent substances comprises an excitation glass fiber into which light which excites the storage luminescent substance can be fed by means of a light source. Light emitted by the excited storage luminescent substance can be fed into a receiving glass fiber, an end of the excitation glass fiber which is positioned close to the storage luminescent substance being arranged next to an end of the receiving glass fiber which can be positioned close to the storage luminescent substance. The excitation glass fiber ( ) has a first numerical aperture and the receiving glass fiber has a second numerical aperture which is large compared with the first numerical aperture, as a result of which the light fed out from the excitation glass fiber is directed straight onto the storage luminescent substance without an optical arrangement and the stimulated light can be captured by the receiving glass fiber without an optical arrangement. A glass fiber drum scanner uses the arrangement for reading photo-stimulable storage luminescent substances to achieve a two-dimensional readout of the storage luminescent substance by means of an advancing device which moves the one ends of the excitation glass fiber and the receiving glass fiber in one direction and by means of a rotary drum to which the storage luminescent substance is attached.

System for reading photo-stimulated accumulative luminescent substances

In a method for imaging in digital dental radioscopy making use of a sensor array, the individual image elements of which are smaller than a desired local resolution so that a plurality of image elements forms a respective effective image element, first reference signals, which are generated by the image elements of the sensor array when said sensor array is not exposed to X-radiation, are initially detected. In addition, second reference signals, which are generated by the image elements of the sensor array when said sensor array is exposed to X-radiation, are detected. Subsequently, defective image elements are determined on the basis of the detected first and second reference signals, whereupon an image of an object is produced using exclusively the image elements that have been determined as being non-defective. Furthermore, during production of the image of an object, it can be determined for the object signals detected for the respective image elements whether said image elements have been hit directly by an X-ray quantum. Image elements that have been hit directly by an X-ray quantum are not used for producing the image of the object.

Method and device for imaging in digital dental radioscopy

A device for detecting X-radiation comprises a scintillator for converting X-radiation impinging thereon into light, a detecting device for detecting the light produced by the scintillator, and a fibre optic system for feeding the light produced by the scintillator to the detecting device. The device for detecting X-radiation is additionally provided with a heating means for heating at least one section of the fibre optic system to a predetermined temperature while the X-radiation is being detected.

Fibre optic X-ray camera

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Fürth, Germany

Randolf Hanke