Abstract: The present invention relates to a system (1010) for X-ray dark field, phase contrast and attenuation image acquisition, the system comprising: an X-ray source (1020); an interferometer arrangement (1030); an X-ray detector (1040); a control unit (1050); at least one vibration transducer (1080); a processing unit (1090); and an output unit (1060). An axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector. An examination region is located between the X-ray source and the X-ray detector, wherein the axis extends through the examination region, and wherein the examination region is configured to enable location of an object to be examined. The interferometer arrangement is located between the X-ray source and the X-ray detector, and wherein the interferometer arrangement comprises a first grating (1032) and a second grating (1034).

Abstract: The invention relates to a system and a method for active grating position tracking in X-ray differential phase contrast imaging and dark-field imaging. The alignment of at least one grating positioned in an X-ray imaging device is measured by illuminating a reflection area located on the grating with a light beam, and detecting a reflection pattern of the light beam reflected by the reflection area. The reflection pattern is compared with a reference pattern corresponding to an alignment optimized for X-ray differential phase contrast imaging, and the X-ray imaging device is controlled upon the comparison of the reflection pattern and the reference pattern.

Abstract: The present invention relates to a method, and a corresponding device, for testing a radius of curvature and/or for detecting inhomogeneities of a curved X-ray grating for a grating-based X-ray imaging device. The method comprises generating a beam of light diverging from a source point, propagating along a main optical axis and having a line-shaped beam profile. The method comprises reflecting the beam off a concave reflective surface of the grating. A principal axis of the concave reflective surface coincides with the main optical axis and the source point is at a predetermined distance from a point where the main optical axis intersects the concave reflective surface.

Abstract: Radically polymerizable dental material, which includes a combination of at least three thiourea derivatives, a hydroperoxide and preferably a transition metal compound as initiator system for the radical polymerization.

Abstract: Disclosed is an apparatus for X-ray dark-field and/or X-ray phase-contrast imaging The apparatus has an imaging system, which includes a first and a second X-ray optical grating and an X-ray sensitive image detector having an ordered array of X-ray sensitive pixels. When no object is present, the first grating generates a fringe pattern in an entrance plane of the second grating. The second grating is configured to generate a Moiré pattern from the fringe pattern so that the Moiré pattern has a pitch which is less than 20 times a pixel pitch of the pixels of the X-ray sensitive image detector. The imaging system further comprises a controller, which is configured to control a relative movement between the second grating and the fringe pattern to acquire a Moiré-image at each of a plurality of different relative image acquisition positions when the object is present.

Abstract: Creation and use of a digital twin instance (DTI) for a physical instance of the part. The DTI may be created by a model inversion process such that model parameters are iterated until a convergence criterion related to a physical resonance inspection result and a digital resonance inspection result is satisfied. The DTI may then be used in relation to part evaluation including through simulated use of the part. The physical instance of the part may be evaluated by way of the DTI or the DTI may be used to generate maintenance schedules specific to the physical instance of the part.

Abstract: A grating structure is provided with arc-shaped stabilizing bridging structures on the lamellae that allow for bending the grating to account for stresses and deformations induced by the bending process to obtain a more stable curved grating structure more efficiently.

Abstract: Device and Method for Evaluating Dark Field Images The present invention relates to the use of dark field X-ray images in an ablation treatment of a tumour. By acquiring dark field X-ray images displaying the region of interest targeted in the ablation treatment, information can be derived which allows taking a decision on terminating the ablation treatment. A set of dark field X-ray images is received (101), which is acquired at different time instants and comprises the region of interest. Dark field X-ray images of the set are compared (102), for example by determining difference images between the individual images. If during that comparison a change in the dark field X-ray images is detected over time in the region of interest, then a signal is generated (103) indicating a change has occurred. That signal may indicate that healthy tissue is being affected instead of the tumour and that consequently the ablation treatment should be ended.

Abstract: Radically polymerizable dental material, which contains a combination of a thiourea derivative and a hydroperoxide according to the following Formula (I) as initiator system for the radical polymerization:

Abstract: An imaging system (702) includes a reconstructor (716) configured to reconstruct obtained cone beam projection data with a voxel-dependent redundancy weighting such that low frequency components of the cone beam projection data are reconstructed with more redundant data than high frequency components of the cone beam projection data to produce volumetric image data. A method includes reconstructing obtained cone beam projection data with a voxel-dependent redundancy weighting such that low frequency components are reconstructed with more redundant data than high frequency components to produce volumetric image data.

Abstract: The present invention relates to an apparatus (10) for presentation of dark field information. It is described to provide (210) an X-ray attenuation image of a region of interest of an object. A dark field X-ray image of the region of interest of the object is also provided (220). A plurality of sub-regions of the region of interest are defined (230) based on the X-ray attenuation image of the region of interest or based on the dark field X-ray image of the region of interest. At least one quantitative value is derived (240) for each of the plurality of sub-regions, wherein the at least one quantitative value for a sub-region comprises data derived from the X-ray attenuation image of the sub-region and data derived from the dark field X-ray image of the sub-region. A plurality of figures of merit are assigned (250) to the plurality of sub-regions, wherein a figure of merit for a sub-region is based on the at least one quantitative value for the sub-region.

Abstract: A device and method for the controlled processing of at least one workpiece (1), comprising a workpiece carrier (2) on which at least one workpiece receptacle (2.1) is present remote from a rotary shaft (2.0), at least one processing unit (3) and at least one inspection unit (4), which are offset relative to the rotary shaft (2.0) by an angular distance (?n) from one another, are each arranged so that they can be adjusted and moved in a translational manner radially with respect to the rotary shaft (2.0), so that a processing beam (E) and an inspection beam (P), offset relative to one another by the angular distance (?n), describe the same spiral-shaped movement path (S) relative to the workpiece carrier (2), and the inspection results derived at an inspection point (PP) are used to control process parameters in order to change the effect of the processing beam (E).

Abstract: The present invention relates to a system (10) for X-ray dark field, phase contrast and attenuation tomosynthesis image acquisition. The system comprises an X-ray source (20), an interferometer arrangement (30), an X-ray detector (40), a control unit (50), and an output unit. A first axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector. An examination region is located between the X-ray source and the X-ray. The first axis extends through the examination region, and the examination region is configured to enable location of an objection to be examined. The interferometer arrangement is located between the X-ray source and the X-ray detector. The interferometer arrangement comprises a first grating (32) and a second grating (34). A second axis is defined that is perpendicular to a plane that is defined with respect to a centre of the first grating and/or a centre of the second grating.

Abstract: The invention relates to a control module for controlling an x-ray system (140) during the acquisition of step images for phase imaging. The control module comprises a step image quantity providing unit (111) for providing a step image quantity, a detector dose providing unit (112) for providing a target detector dose, an applied detector dose determination unit (113) for determining an applied detector dose absorbed by a part of the detector (144) during the acquisition of a step image, and a step image acquisition control unit (114) for controlling the x-ray imaging system (140) during the acquisition of each step image based on the applied detector dose, the target detector dose and the step image quantity. The control module allows to control the x-ray imaging system such that the target detector dose is not exceeded while at the same time ensuring a sufficient quality of the step images.

Abstract: The invention relates to a system consisting of a laser which emits laser radiation with a wavelength of more than 1300 nm, in particular between 2750 nm and 3200 nm, and a dental adhesive for applying a dental restoration part to a pre-treated, in particular cleaned, adhesive base which is formed by hard dental tissue or by denture material. The viscous dental adhesive applied to the adhesive base, which is free of a dental restoration part, can be activated, in particular without blowing or agitation, by applying laser radiation.

Abstract: The present invention refers to providing a system that allows to very accurately determine the state of a disease, like COPD, in a patient. The system (100) comprises a unit (101) for providing images of the region of interest corresponding to different states of the region of interest, a unit (102) for elastically registering the images to each other resulting in an elastic registration output, a unit (103) for determining a specific tissue region in an image, a unit (104) for determining a specific elastic registration output for the specific tissue region based on the determined elastic registration output, and a unit (105) for determining an elastic indicator for the specific tissue type based on the specific elastic registration output. Thus, a state of a disease that influences the elastic properties of the specific tissue type can be determined very accurately.

Abstract: The invention relates to a system for reconstructing an image of an object. The system (100) comprises means (110) providing projection data acquired by an imaging unit, like a CT system, with an FOV, means (120) generating estimated image data indicative of a part of an object (20) located outside the FOV (210), means (130) estimating virtual projection data based on virtual settings of a virtual imaging unit comprising a virtual FOV, means (140) generating fused projection data by fusing the provided projection data with the virtual projection data, and means (150) reconstructing a final image. This allows basing the reconstruction on a complete set of projection information for the object and thus providing an image with a high image quality.

Abstract: The present invention relates to a calculation device (10) for comparing dark-field X-ray images. The calculation device in (10) is configured for receiving a first dark-field X-ray image (11) describing first dark-field X-ray signals of a patient at an expiration state and for receiving a second dark-field X-ray image (12) describing second dark-field X-ray signals of the patient at an inspiration state. The calculation device is further (10) configured for normalizing the first dark-field X-ray signals of the first dark-field X-ray tin image (11) with a lung thickness value describing the lung thickness at the expiration state and for normalizing the second dark-field X-ray signals of the second dark-field X-ray image (12) with a lung thickness value describing the lung thickness at the inspiration state.

Abstract: The present invention relates to acquiring reference scan data for X-ray phase-contrast imaging and/or X-ray dark-field imaging. Therefore an X-ray detector (26) is arranged opposite an X-ray source (12) across an examination region (30) with a grating arrangement (18) arranged between the X-ray source (12) and the X-ray detector (26). During an imaging operation without an object in the examination region (30) the grating arrangement (18) is moved in a scanning motion to a number of different positions (a) relative to the X-ray detector (26) whilst the X-ray detector (26) remains stationary relative to the examination region (30) such that in the scanning motion a series of fringe patterns is detected by the X-ray detector (26). The scanning motion is repeated for a different series of fringe patterns. This allows acquiring reference scan data required for calibration of an X-ray imaging device (10??) with less scanning motions.

Abstract: In a method and system for reconstructing computed tomography image data in which CT image data is de-noised. Then simulated noise is added, followed by another de-noising step to estimate the bias. Then, the estimated bias information is used to correct the original de-noised image data to arrive at second pass image data.