Abstract: 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.

Abstract: 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.

Abstract: An image reconstruction method for reconstructing an image fmin representing a region of investigation within an object includes providing detector data (yi) having Poisson random values from an X-ray transmission measurement using an X-ray source and a detector device, the detector data (yi) being measured at an i-th of a plurality of different pixel positions of the detector device relative to the object, and reconstructing the image fmin based on the detector data (yi), the reconstructing step including a procedure of minimizing a functional F ? ( f _ ) = 1 k ? ? i = 1 k ? ? ( ? i - y i ? log ? ? ? i ) + a ? ? T - 1 ? f _ ? p where f is a current test image used for minimizing the functional F(f). The image fmin represents the global minimum of F(f).

Abstract: An image reconstruction method for reconstructing an image fmin representing a region of investigation within an object includes providing detector data (yi) having Poisson random values from an X-ray transmission measurement using an X-ray source and a detector device, the detector data (yi) being measured at an i-th of a plurality of different pixel positions of the detector device relative to the object, and reconstructing the image fmin based on the detector data (yi), the reconstructing step including a procedure of minimizing a functional F ? ( f _ ) = 1 k ? ? i = 1 k ? ? ( ? i - y i ? log ? ? ? i ) + a ? ? T - 1 ? f _ ? p where f is a current test image used for minimizing the functional F(f). The image fmin represents the global minimum of F(f).

Abstract: 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.

Abstract: The reconstruction of artifact free images is made possible by the implementation of a SPECT imaging device that employs helical scanning. The SPECT imaging device includes a detector configured to detect photons, such as photons, that are projected onto it. A collimator is axially aligned with the detector and includes a plurality of pinholes configured to create overlapping projections of the photons. An object support structure is configured to move in a direction that is axially aligned with the detector and collimator. The detector and collimator are configured to rotate around the object support structure in a transaxial plane to the object support structure while the object support structure moves in an axial direct to the collimator and detector.