Helmholtz Zentrum Munchen Deutsches Forschungszentrum Fur Gesundheit Und Umwelt

University of Oregon

Other

Oregon State University

Helmholtz Zentrum Muenchen Deutsches Forschungszentrum Fuer Gesundheit Und Umwelt Gmbh

Scivis Wissenschaftliche Bildverarbeitung Gmbh

Helmholtz Zentrum Mü Deutsches Forscshungszentrum Fur Gesundheit And Umwelt (Gmbh)

Helmholtz Zentrum Muenchen Deutsches Forschungszentrum Fuer Gesundhiet Und Umwelt (gmbh)

Helmholtz Zentrum Munchen Deutsches Forschungszentrum Fur Gesundheit (gmbh)

State of Oregon

Lavision Biotec Gmbh

Reichl, Mathias

Klein, Rolf-dieter

Christoph Hoeschen

Oleg Tischenko

Yuan Xu

Rolf-Dieter Klein

Mathias Reichl

Matthias Klaften

Jens Knobbe

Michael Scholles

Timo Aspelmeier

Gernot Ebel

Lars Kroker

Hugo De Las Heras

Martin Hrabe De Angelis

The invention relates to a monitoring device () 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 () for computing a hazard warning (-) dependent on the measured values. The receiver is designed to receive the measured values from a plurality of spatially distributed electronic terminals (-), in particular from mobile telephones with an image sensor for measuring the radioactive radiation. The invention further relates to a corresponding terminal (-) and to a complete monitoring system with a monitoring device and numerous terminals (-) for measuring the environmental variable.

Monitoring device, terminal, and monitoring system for monitoring the environment

The invention relates to a method for operating an electronic terminal (-) comprising an integrated image sensor (-) 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 (-). The invention further relates to a terminal that operates accordingly (e.g. a smart phone having a corresponding application program).

Method for measuring radiation by means of an electronic terminal having a digital camera

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.

Autostereoscopic display that provides a 3-dimensional visual impression

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.

Tomography apparatus and tomography method

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.

Scanner device and method for computed tomography imaging

An image processing method for providing a digitized image as an approximation of an image function &#x192;, wherein the digitized image comprises a plurality of pixels with a predetermined pixel size, comprises the steps of providing the image function &#x192; 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.

Method of processing a Radon data based image function and imaging method

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.

Reconstructing a tomographic image with reduced artifacts

An image reconstruction method for reconstructing a tomographic image (f) of a region of investigation within an object (), comprises the steps of providing detector data (y) 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 (&#x3b1;) and the rotation radius (r) of the detector device () relative to the object (), providing a predetermined system matrix Aassigning a j-th voxel of the object () to the i-th detector data (y), and reconstructing the tomographic image (f) based on the detector data (y), said reconstructing step including a procedure of minimizing a functional F(f) depending on the detector data (y) and the system matrix Aand additionally including a sparse or compressive representation of the object () in an orthobasis T, wherein the tomographic image (f) represents the global minimum of the functional F(f). Furthermore, an imaging method and an imaging device using the image reconstruction method are described.

Tomographic imaging using poissonian detector data

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.

Method and device for imaging tomography

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.

Method of reconstructing an image function from Radon data

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.

Imaging method and device with dual reading scanner

A method of reconstructing an (n+1)-dimensional image function &#x192; representing a region of investigation comprises determining the image function &#x192; 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 (&#x398;), wherein the image function &#x192; 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.

Method and device of reconstructing an (n+1)-dimensional image function from radon data

Imaging apparatus, for analyzing an object, comprising: a radiation source for transmission of radiation through said object in a section plane of said object; a radiation detector for detecting said radiation in said section plane of said object after transmission through said object; and a masking device for masking out a part of said radiation, wherein said masked part of said radiation is movable in said section plane relative to said radiation detector during said analysis of said object.

Imaging apparatus and imaging method

An irradiation method, in particular for imaging a region of investigation () of an object (), comprises generating at least one energy input beam () with at least one energy input beam source (), wherein the at least one energy input beam () comprises a plurality of individual energy input beam components (, . . . ), and irradiating the region of investigation () with the at least one energy input beam () along a plurality of projection directions, wherein the energy input beam components (, . . . ) are formed with at least one beam mask () made of an energy input shielding material with through holes. Furthermore, imaging methods and devices for irradiating or imaging the object are described.

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Hebertshausen, Germany

Christoph Hoeschen