Forschungszentrum Julich Gmbh

Lavision Biotec Gmbh

Scivis Wissenschaftliche Bildverarbeitung Gmbh

Rayvis Gmbh

Uwe Engeland

Frank Killich

Timo Aspelmeier

Gernot Ebel

Nils Schramm

Christian Lackas

Gemot Ebel

A radiation field measuring device for the characterization of a radiation comprises a detector device and a reconstruction device. The detector device may have at least one detector camera, which contains at least one detector array arranged for the image recording of scattered radiation in a multiplicity of lateral directions that deviate from the longitudinal direction. The reconstruction device may be configured for the tomographic reconstruction of a field density of the scattered radiation in the radiation field.

Measuring device and methods for characterization of a radiation field

An image reconstruction method for reconstructing an imagerepresenting a region of investigation within an object includes providing detector data (y) having Poisson random values from an X-ray transmission measurement using an X-ray source and a detector device, the detector data (y) being measured at an i-th of a plurality of different pixel positions of the detector device relative to the object, and reconstructing the imagebased on the detector data (y), the reconstructing step including a procedure of minimizing a functional whereis a current test image used for minimizing the functional F(). The imagerepresents the global minimum of F().

Transmission image reconstruction and imaging using poissonian detector data

The invention relates to a device for carrying out a tomographic method, in particular for carrying out single-photon tomography, with at least one multi-hole collimator and at least one detector, for recording photons which pass through the multi-hole collimator. The above is characterised in comprising means which permit a relative translational movement between an object under investigation and the detector(s) with a positional accuracy of less than 1 millimeter. The relative positional change between object and detector(s) during the execution of the method is taken into account in the subsequent reconstruction method to an accuracy of less than 1 mm, in particular, less than 0.1 mm. A reconstruction method is used for the above which takes into account the positional and angular information between object and detector. Said method may be controlled by and carried out on a current PC.

Tomographic device and method with translational movement between object and detector

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Göttingen, Germany

Uwe Engeland