Siemens Aktiengesellschaft

Paul Scherrer Institut

Siemens Healthcare Gmbh

Siemens Aktiengesell Schaft

Martin Hoheisel

Stefan Popescu

Eckhard Hempel

Thomas Mertelmeier

Hartmut Sklebitz

Franz Pfeiffer

Christian David

Joachim W Baumann

Manfred Schuster

Martin Engelhardt

Jörg Freudenberger

Philipp Bernhardt

Dietrich Hassler

Tilman Donath

Ralf Nanke

Rainer Raupach

Manfred Rattner

Bernd Granz

Jens Fehre

Gerhard Buchholtz

Matthias Mahler

Markus Lanski

Christian Meinert

Martin Schaefer

Werner Kruft

Karl Stierstorfer

Martin Spahn

Thomas Redel

Detlef Mattern

Holger Kunze

Estelle Camus

Marcus Radicke

Ernst-Peter Rührnschopf

Martin Schäfer

Christoph Josef Brabec

Olivier Ecabert

Matthias Honal

Gerhard Brunst

Peter Strattner

Rico Eidam

Hartmut Skleritz

Florian Baier

Juergen Kirsch

Lothar Bätz

Barbara Matthis

Enno Holzenkaempfer

Stefan Prof Popescu

Franz Dr Prof Pfeiffer

Franz Prof Pfeiffer

A method for assisting in navigation of a medical instrument such as a catheter inside a hollow body such as a vascular system based on a dataset provided by a sensor device of the medical instrument is provided The method includes determining, by a control device, an internal extent of the hollow body based on the provided dataset and determining, by the control device, a navigation path for an impending movement of the medical instrument through the hollow body based on the determined internal extent. The control device is able to generate a control signal that describes a movement along the navigation path.

Assisting in navigation of a medical instrument

A medical instrument is provided for use with a phase contrast imaging. The medical instrument includes at least one component, which has a strong small angle scattering of x-rays. Furthermore, a corresponding x-ray recording system with phase contrast imaging for recording an examination object may include such a medical instrument.

Medical instrument for use with a phase contrast imaging and X-ray recording system with phase contrast imaging

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.

Medical intervention device

A method is described for producing a grating, in particular an absorption grating, having a grating constant of less than 100 &#x3bc;m, by using a solution of superparamagnetic colloidal nanocrystal clusters (CNCs), a solvent liquid and a photocurable resin, with the following steps: &#x2014;alignment of the CNCs in the solution by an external magnetic field, &#x2014;exposure of the solution, so that the resin is cured and grating structures of an intended grating constant are formed, and &#x2014;removal of the magnetic field.

Method for producing a grating and phase contrast X-ray system

An arrangement and a method are disclosed for projective and/or tomographic phase-contrast imaging using X-ray radiation. In at least one embodiment, one or more phase grids is/are arranged in the beam path such that during a rotation of the at least one X-ray source, the examination object is scanned with different spatial orientations of the grid lines relative to the examination object such that the complete refraction angle, and hence the complete phase shift gradient, can be determined for each X-ray beam from the two scans with differently oriented phase grids in order to be able to show the phase shift of an examination object in terms of projections or in a tomographic image.

Arrangement and method for projective and/or tomographic phase-contrast imaging using X-ray radiation

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.

Method for protecting a display facility

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.

Method for marking and visualizing an implant by way of an x-ray phase-contrast tomography examination and an implant

In a method for the production of x-ray-optical gratings composed of a first material forming of periodically arranged grating webs and grating openings, a second material is applied by electroplating to fill the grid openings. The electroplating is continued until a cohesive layer of the second material with uniform height is created over the grating webs with this layer having a large absorption coefficient, the absorption properties of the grating structure of the grating are homogenized, so an improvement of the measurement signals that are generated with this grating is improved. Moreover, the mechanical stability of gratings produced in such a manner is improved.

X-ray optical grating and method for the production thereof, and X-ray detector embodying same

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 (&#x3c6;).

X-ray CT system to generate tomographic phase contrast or dark field exposures

In a shockwave system with a shockwave source for treatment of a patient with shockwaves, a control and evaluation unit for evaluating an input signal supplied directly thereto that is correlated with a blood pressure value of the patient determined during the treatment, and controls the shockwave source dependent on the input signal.

Shockwave system control dependent on patient's blood pressure

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.

X-ray CT system for x-ray phase contrast and/or x-ray dark field imaging

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.

Mammography method and apparatus with image data obtained at different degrees of breast compression

A sequence of groups of projection images shows an object under examination comprising a vascular system and its environment. A computer determines a 2-dimensional evaluation image having a plurality of pixels based on combination images determined from the projection images of a group. The combination images have a plurality of pixels with pixel values. The sequence of the combination images shows the time characteristic of the distribution of a contrast medium in the object. The pixels of the evaluation image correspond to those of the projection images. The computer assigns each pixel, at least in a part area of the evaluation image, a type that is characteristic of whether the respective pixel corresponds to a vessel of the vascular system, a perfusion area or a background. It performs the assignment of the type on the basis of the time characteristic of the pixel values of the combination images.

X-ray device having a dual energy mode and method to analyze projection images detected in the dual energy mode

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.

Focus detector arrangement and method for generating contrast x-ray images

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.

X-ray absorption grid

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Erlangen, Germany

Martin Hoheisel