Abstract: A method and apparatus for x-ray fluorescence measurement in object (1) are disclosed. The method includes (a) producing x-ray beam (2) using source device (10), wherein beam extends through object parallel to a first projection direction, (b) irradiating object with beam at scan positions in first projection plane, which are set by scanning device (20) such that source device and object are moved relative to one another, (c) detecting x-ray radiation emitted from object using detector array device (30) securely connected to source device and including spectrally selective detector elements (31) arranged to detect radiation, and stop lamellas (32) extending in radial directions relative to beam direction shielding detector elements from radiation scattered in object and arranged such that detector elements are able to detect radiation from all locations, and (d) processing detector signals to capture x-ray fluorescence of target particles in radiation and to localize target particles in object.

Abstract: A method for an x-ray fluorescence measurement, in which the presence of fluorescing target particles is captured in an object (1) to be examined and target particles that are present are localized in the object (1), comprises the steps of (a) producing an x-ray beam (2) by means of a source device (10), wherein the x-ray beam (2) extends through the object (1) in an x-ray beam direction parallel to a first projection direction, (b) irradiating the object (1) with the x-ray beam (2) at a multiplicity of scan positions in a first projection plane, wherein the scan positions are set by a scanning device (20), by means of which the source device and the object (1) are moved relative to one another, (c) detecting x-ray radiation, emitted from the object (1) in a plurality of spatial directions, at each scan position using a detector array device (30), which is securely connected to the source device (10), wherein the detector array device (30) comprises a multiplicity of spectrally selective detector elements (31

Abstract: The invention relates to a monitoring device (6) for monitoring the environment, in particular for monitoring the environment for radioactive radiation, comprising at least one receiver for receiving measured values of an environmental variable that potentially poses a health hazard and comprising a computing unit (10) for computing a hazard warning (4.1-4.4) dependent on the measured values. The receiver is designed to receive the measured values from a plurality of spatially distributed electronic terminals (2.1-2.4), in particular from mobile telephones with an image sensor for measuring the radioactive radiation. The invention further relates to a corresponding terminal (2.1-2.4) and to a complete monitoring system with a monitoring device and numerous terminals (2.1-2.4) for measuring the environmental variable.

Abstract: The invention relates to a method for operating an electronic terminal (1.1-1.4) comprising an integrated image sensor (2.1-2.4) that has a large number of pixels, in particular for a mobile telephone. According to the invention, a dosage value of ionizing radiation striking the image sensor is determined by means of the image sensor (2.1-2.4). The invention further relates to a terminal that operates accordingly (e.g. a smart phone having a corresponding application program).

Abstract: An autostereoscopic display includes a background illumination with a multiplicity of parallel light strip groups with in each case at least two parallel light strips, wherein the individual light strip groups are arranged next to one another with a first grid dimension, and a lens grid arranged before the background illumination and has a multiplicity of parallel lens strips, wherein the lens strips are arranged next to one another with a second grid dimension, as well as a light modulator arranged before the lens grid and displays image information.

Abstract: The invention relates to a method for operating an electronic terminal (1.1-1.4) comprising an integrated image sensor (2.1-2.4) that has a large number of pixels, in particular for a mobile telephone. According to the invention, a dosage value of ionising radiation striking the image sensor is determined by means of the image sensor (2.1-2.4). The invention further relates to a terminal that operates accordingly (e.g. a smart phone having a corresponding application program).

Abstract: The invention relates to a monitoring device (6) for monitoring the environment, in particular for monitoring the environment for radioactive radiation, comprising at least one receiver for receiving measured values of an environmental variable that potentially poses a health hazard and comprising a computing unit (10) for computing a hazard warning (4.1-4.4) dependent on the measured values. The receiver is designed to receive the measured values from a plurality of spatially distributed electronic terminals (2.1-2.4), in particular from mobile telephones with an image sensor for measuring the radioactive radiation. The invention further relates to a corresponding terminal (2.1-2.4) and to a complete monitoring system with a monitoring device and numerous terminals (2.1-2.4) for measuring the environmental variable.

Abstract: A tomography apparatus that generates images of an object includes a radiation source emitting a radiation beam, wherein the radiation beam rotates around the object and penetrates the object; a radiation detector rotating around the object opposite the radiation source so that the radiation detector detects the radiation beam after penetration of the object; a radiation mask surrounding the object that masks the radiation beam, wherein the radiation mask is arranged in a path of the radiation beam between the radiation source and the radiation detector and the radiation beam passes the radiation mask only once between the radiation source and the radiation detector.

Abstract: The invention relates to an electronic device, in particular a mobile telephone (1), comprising an image sensor (4) with multiple pixels for capturing an image. The image sensor (4) is also sensitive to ionizing radiation, in particular pulsed high-energy radiation. The invention additionally relates to a radiation sensor (5) for measuring the ionizing radiation.

Abstract: A scanner device for computed tomography imaging of an object, includes a measurement device including a source device arranged for irradiating the object with at least one beam and a detector device arranged for detecting radiation transmitted through the object, wherein the source device has a fixed position relative the detector device, and a carrier device accommodating the object in a position between the source device and the detector device, wherein the measurement device and the carrier device are capable of a scanning movement relative to each other, and the measurement device and the carrier device have a fixed spatial orientation during the scanning movement. Furthermore, a scanning method for computed tomography imaging of an object is described.

Abstract: An image processing method for providing a digitized image as an approximation of an image function ƒ, wherein the digitized image comprises a plurality of pixels with a predetermined pixel size, comprises the steps of providing the image function ƒ from Radon data comprising a plurality of projection functions measured corresponding to a plurality of predetermined projection directions (v), and determining pixel values from the image function, the pixel values representing the digitized image to be obtained, wherein the pixel values are determined in dependence on at least two image function values within the pixel size of the respective pixel. Furthermore, an imaging method and an imaging device using the image processing method are described.

Abstract: A method of reconstructing a tomographic image of a region of investigation with reduced artifacts, said method comprises the steps of (a) reconstructing a first partial image and a second partial image of the region of investigation from first and second projection profiles each of which including projection data collected at first and second different groups of parallel projection lines, resp., wherein the first and second projection profiles are provided such that streak aliasing artifacts in the first and second partial images have different spatial phases, and (b) generating the tomographic image of the region of investigation by superimposing the first and second partial images. Preferably, the first and second projection profiles are constructed such that streak aliasing artifacts in the first and second partial images have opposite spatial phases relative to each other. Furthermore, an imaging method and an imaging device for imaging a region of investigation in an object are described.

Abstract: An image reconstruction method for reconstructing a tomographic image (fj) of a region of investigation within an object (1), comprises the steps of providing detector data (yi) comprising Poisson random values measured at an i-th of a plurality of different positions, e.g. i=(k,l) with pixel index k on a detector device and angular index l referring to both the angular position (?l) and the rotation radius (rl) of the detector device (10) relative to the object (1), providing a predetermined system matrix Aij assigning a j-th voxel of the object (1) to the i-th detector data (yi), and reconstructing the tomographic image (fj) based on the detector data (yi), said reconstructing step including a procedure of minimizing a functional F(f) depending on the detector data (yi) and the system matrix Aij and additionally including a sparse or compressive representation of the object (1) in an orthobasis T, wherein the tomographic image (fj) represents the global minimum of the functional F(f).

Abstract: A tomography apparatus that generates images of an object includes a radiation source emitting a radiation beam, wherein the radiation beam rotates around the object and penetrates the object; a radiation detector rotating around the object opposite the radiation source so that the radiation detector detects the radiation beam after penetration of the object; a radiation mask surrounding the object that masks the radiation beam, wherein the radiation mask is arranged in a path of the radiation beam between the radiation source and the radiation detector and the radiation beam passes the radiation mask only once between the radiation source and the radiation detector.

Abstract: An image reconstruction method for reconstructing a tomographic image (fj) of a region of investigation within an object (1), comprises the steps of providing detector data (yi) comprising Poisson random values measured at an i-th of a plurality of different positions, e.g. i=(k,l) with pixel index k on a detector device and angular index l referring to both the angular position (?l) and the rotation radius (rl) of the detector device (10) relative to the object (1), providing a predetermined system matrix Aij assigning a j-th voxel of the object (1) to the i-th detector data (yi), and reconstructing the tomographic image (fj) based on the detector data (yi), said reconstructing step including a procedure of minimizing a functional F(f) depending on the detector data (yi) and the system matrix Aij and additionally including a sparse or compressive representation of the object (1) in an orthobasis T, wherein the tomographic image (fj) represents the global minimum of the functional F(f).

Abstract: An autostereoscopic display includes a background illumination with a multiplicity of parallel light strip groups with in each case at least two parallel light strips, wherein the individual light strip groups are arranged next to one another with a first grid dimension, and a lens grid arranged before the background illumination and has a multiplicity of parallel lens strips, wherein the lens strips are arranged next to one another with a second grid dimension, as well as a light modulator arranged before the lens grid and displays image information.

Abstract: An imaging method for imaging a region of investigation of an object, comprises the step of irradiating the region of investigation with at least one energy input beam along a plurality of projection directions, wherein the at least one energy input beam comprises a plurality of individual energy input beam components, wherein the energy input beam is shaped such that at least two of the energy input beam components have different cross-sections and groups of parallel energy input beam components being parallel to one of the projection directions provide a continuous irradiation of the region of investigation. Furthermore, a device for imaging the object is described.

Abstract: A method of reconstructing an image function on the basis of a plurality of projection profiles corresponding to a plurality of projection directions through a region of investigation, each projection profile including a series of value positions, wherein measured projection values corresponding to projection lines parallel to the respective projection direction are assigned to respective value positions and a plurality of remaining value positions are empty, comprises the steps of (a) assigning first interpolation values to the empty value positions for constructing a plurality of interpolation profiles on the basis of the projection profiles, wherein the first interpolation values are obtained from a first interpolation within a group of measured projection values having the same value position in different projection profiles, and (b) determining the image function by applying a predetermined reconstruction algorithm on the interpolation profiles.

Abstract: An imaging method for imaging a region of investigation of an object comprises the steps of generating an energy input beam with an energy beam source, irradiating the region of investigation with energy input beam components of the energy input beam along a plurality of projection directions, the energy input beam components being formed with a frame mask being arranged between the energy input beam and the object and including frame mask windows, measuring first integrated attenuation values of the energy input beam components with an outer detector device arranged outside the frame mask, measuring second integrated attenuation values of the energy input beam components with a frame mask detector device being arranged on an inner surface of the frame mask, and reconstructing an image of the region of investigation based on the first and second integrated attenuation values. Furthermore, an imaging device for imaging a region of investigation of an object is described.

Abstract: A method of reconstructing an (n+1)-dimensional image function ƒ representing a region of investigation comprises determining the image function ƒ from n-dimensional or less dimensional Radon data comprising a plurality of projection functions p?(t) measured corresponding to a plurality of predetermined projection directions (?), wherein the image function ƒ is determined as a sum of polynomials multiplied with values of the projection functions p?(t). Imaging methods, imaging devices, and computer tomography devices using this reconstruction method are described.