Abstract: An x-ray CT system for x-ray phase contrast and/or x-ray dark field imaging has a grating interferometer that has a first grating structure that has a number of band-shaped x-ray emission maxima and minima arranged in parallel, the maxima and minima exhibiting a first grating period, a second band-shaped grating structure that produces, as a phase grating, a partial phase offset of x-ray radiation passing therethrough and that exhibits a second grating period, a third band-shaped grating structure with a third grating period with which relative phase shifts of adjacent x-rays and/or their scatter components are detected, and a device for value-based determination of the phase between adjacent x-rays and/or for value-based determination of the spatial intensity curve per detector element perpendicular to the bands of the grating structures. The third grating structure has a grating period that is larger by a factor of 2 to 5 than the grating period of the first grating structure.

Abstract: An x-ray CT system that generates tomographic phase contrast or dark field exposures, has at least one grating interferometer with three grating structures arranged in series in the radiation direction, with a modular design of the second and third grating structures. The distance between the first grating structure of the x-ray source and the second grating structure (fashioned as a phase grating) of the respective grating/detector modules is adapted, depending on the fan angle, corresponding to a period of the grating structure of the x-ray source projected onto the grating detector module at a respective fan angle (?i).

Abstract: The invention relates to a device for protecting a display facility, comprising a protective element for covering an image surface of the display facility. As the protective element is designed to be transparent and the retaining means are provided for the exchangeable arrangement of the protective element in front of the image surface, a protective device is provided, which allows the image surface to be examined and is easy to operate.

Abstract: A method and a measurement system are disclosed for the noninvasive determination of properties of an object to be examined and to the use of a contrast medium for X-ray phase-contrast measurement. in at least one embodiment of the invention, a mixture (suspension) consisting of a base liquid and a multiplicity of particles contained therein is used, the refractive index of the base liquid being different to the refractive index of the particles.

Abstract: A scintillator plate has a radiation-permeable substrate on which a scintillator layer is applied. The substrate is composed of a cellular metallic material and has a smooth, closed outer skin. Such a scintillator plate has high mechanical stability with good radiation permeability.

Abstract: An X-ray optical transmission grating of a focus-detector arrangement of an X-ray apparatus is disclosed, for generating projective or tomographic phase contrast recordings of a subject. In at least one embodiment, the grating includes a multiplicity of grating bars and grating gaps arranged periodically on at least one surface of at least one wafer, wherein the X-ray optical transmission grating includes at least two sub-gratings arranged in direct succession in the beam direction.

Abstract: In a method and apparatus to generate a mammographic image, the apparatus has a radiation source, a digital radiation detector, and support plate and a compression plate between which the breast is compressed during image acquisition. A first image data set depicting the breast is acquired, with a first degree of compression of the breast. A second degree of compression of the breast is set and a second image data set depicting the breast is acquired. The first and second image data sets are linked for the generation of the diagnostic image.

Abstract: In a catheter device and a method for in vivo activation of a photosensitizing drug in a vessel, endovascular tissue, and/or intraluminal tissue, a catheter carrying both an optical coherence tomography (OCT) lens, from which OCT imaging light is emitted, and a photodynamic therapy (PDT) lens from which photosensitizing drug-activating light is emitted, is inserted into a vessel containing a lesion to be treated. A photosensitizing drug is caused to be placed in the vessel as well, such as in the form of a coating on a stent or a coating on an exterior of a balloon carried by the catheter. Light is emitted from the PDT lens to activate the photosensitizing drug while light is simultaneously emitted from the OCT lens to obtain an OCT image to monitor the drug activation.

Abstract: The invention relates to a method and a device for analyzing a biological tissue, whereby a luminescence light of a luminescence substance is detected. The aim of the invention is to increase the precision and reliability of the analysis. To this end, a permutation symmetry imbalance is generated in the tissue by a magnetic field, the permutation symmetry imbalance is modified at a pre-determined location by a magnetic alternating field, and the luminescence light is detected according to the pre-determined location.

Abstract: In a medical imaging system and method, an image data acquisition system is operable in a fluoroscopy mode to obtain a fluoroscopic image of a subject and is operable in a CT mode to obtain projection data sets of the subject that are used to reconstruct a three-dimensional image of a region of interest of the subject. For imaging procedures involving the administration of contrast agent to the subject, the image data acquisition apparatus is operated in the fluoroscopy mode at the time the administration of contrast agent is begun, and the filling of vessels with the contrast agent is automatically monitored by fluoroscopy. When the automatic monitoring indicates that an optimal degree of filling of the vessels with the contrast agent has occurred, the image data acquisition apparatus is automatically switched to operate in the CT mode to acquire projection data sets of the region of interest containing the vessels filled with contrast agent.

Abstract: A focus-detector arrangement of an X-ray apparatus is disclosed for generating projective or tomographic phase contrast recordings with a phase grating. According to at least one embodiment of the invention, in the gaps between its bars, the phase grating includes a filler material whose linear attenuation coefficient in the relevant energy range is greater than that of the bars. The height of the filler material in the gaps is dimensioned on the one hand so that the X-radiation with the energy used for measuring the phase shift generates a phase shift in the X-radiation such that, after the phase grating, the rays which pass through the bars are phase shifted by one half wavelength relative to the rays which pass through the gaps with the filler material.

Abstract: A method and an x-ray computed tomography system are disclosed for visualizing at least two different types of cardiac tissue, such as normally perfused tissue, hypoperfused tissue and scarred tissue.

Abstract: In a focus detector arrangement and method for an x-ray apparatus for generating projection or tomographic phase-contrast images of an examination subject, a beam of coherent x-rays is generated by an anode that has areas of different radiation emission characteristics arranged in bands thereon, that proceed parallel to grid lines of a phase grid that is used to generate the phase-contrast images.

Abstract: The invention relates to a device for a medical intervention in or on moving tissue of a living being, said device having a medical instrument provided for the intervention, a position detection system by means of which the position of the medical instrument in the body of the living being can be determined, and at least one acceleration sensor for recording at least one movement of the instrument caused by the moving tissue. The invention also relates to a medical instrument for a medical intervention in or on moving tissue of a living being, said medical instrument having at least one acceleration sensor and a sensor of a position detection system, as well as to an operating method for the device.

Abstract: A method and an x-ray system are disclosed for detecting and localizing a metabolic marker.

Abstract: A method is disclosed for marking and visualizing an implant by use of an x-ray phase-contrast tomography examination. Further, an implant is also disclosed. In at least one embodiment, implants are used with specific characteristics which are as unambiguous as possible with regard to the phase shift generated by the implants in a phase-contrast tomography examination. In at least one embodiment, these specific characteristics can include the typical self-generated specific phase shift, typical differences in the specific phase-shift values, or typical spatial structures of materials with well-defined phase-shift values.

Abstract: A method and an x-ray computed tomography system are disclosed for visualizing at least two different types of cardiac tissue, such as normally perfused tissue, hypoperfused tissue and scarred tissue.

Abstract: A focus-detector arrangement includes a radiation source with a focus, arranged on a first side of the subject, for generating a fan-shaped or conical beam of rays; at least one X-ray optical grating arranged in the beam path, with at least one phase grating arranged on the opposite second side of the subject in the beam path generating an interference pattern of the X-radiation preferably, in a particular energy range; and an analysis-detector system which detects at least the interference pattern generated by the phase grating in respect of its phase shift with position resolution. According to at least one embodiment of the invention, at least one X-ray optical grating including bars which are free from overhangs form shadows in the beam path of the fan-shaped or conical beam of rays.

Abstract: A method and a measurement system are disclosed for the noninvasive determination of properties of an object to be examined and to the use of a contrast medium for X-ray phase-contrast measurement. in at least one embodiment of the invention, a mixture (suspension) consisting of a base liquid and a multiplicity of particles contained therein is used, the refractive index of the base liquid being different to the refractive index of the particles.

Abstract: An x-ray absorption grid produced by a lithography method for use in a phase-contrast CT system has at least two individual grids arranged atop one another in the radiation direction. Each individual grid has a grid area with a grid structure including grid webs and grid gaps in alternation. Each individual grid has a region outside of the grid area (outer region). The outer region of the at least two individual grids has toothed structures corresponding to one another at least two points. The toothed structures are generated as well in the production of the grid structure. The toothed structures have a position that is defined relative to the grid structure, such that a defined alignment of the individual grids occurs given a combination of the individual grids by engagement of the toothed structures of individual grids lying atop one another.