Abstract: A method for acquiring a 3D image dataset for an image object based on a plurality of 2D image datasets relating to the image object is proposed. A scattered radiation is taken into account in an acquisition operator used in the method for the optimum reconstruction of the 3D image dataset. The acquisition operator should be as close as possible to the real mapping operator.

Abstract: A method for temporally registering two image series datasets, each of which images a preferably periodically moving object and consists of time-resolved single images each composed of pixels or voxels, with a single image, recorded at a first instant, in the first image series dataset being in each case assigned to a single image, recorded at the same or another instant, in the second image series dataset, with the specific single image in the second image series dataset exhibiting maximum similarity to the single image in the first image series dataset being determined for registering a single image in the first image series dataset.

Abstract: A method for correcting truncated projection data of a rotation for a reconstruction technique for computed tomography scans with truncated projection data in the computed tomography images produced by a C-arm is proposed. At least one truncated projection is recorded. The truncated portions prior to acquisition of the rotation for the at least one truncated projection is captured. The truncated projection and the truncated portions are assembled into at least one complete projection. Truncated projection data is acquired during the rotation. The truncated data is estimated based on a model of the patient geometry from the at least one complete projection. A reconstruction technique is performed on the basis of the acquired and the estimated data.

Abstract: A method for image support in a navigation of a medical instrument, in particular a catheter, in at least one hollow organ in a surgical site of a body is proposed. A presentation of a current position of the instrument in the hollow organ is generated from a three-dimensional dataset of the surgical site and the presentation data describes the current position of the instrument. At least one geometry parameter influencing the generation and/or display of the presentation is automatically adjusted taking into account position data of the instrument describing the current three-dimensional position and the current three-dimensional orientation of a tip of the instrument. The presentation corresponding to the geometry parameters is displayed.

Abstract: A method for calculating perfusion data, such as blood volume or blood flow from 2-D angiography data or DSA sequences, is proposed. An angiography scene is recorded using specific acquisition parameters to generate the 2-D angiography data or DSA sequences with administration of contrast agent based on a multiplicity of individual angiography images. A region of interest is defined suitable for comparison purposes. The volume segments are defined by the region of interest. The time/contrast curve is determined in the volume segments. Perfusion data for calculating the relative perfusion data is ascertained. The perfusion data is compared and the relative perfusion data is calculated. The calculated relative perfusion data is not specified in terms of absolute physical quantities, but is provided simply as ratios, such as left/right or before/after.

Abstract: With an x-ray imaging system with a moveable part, obstacles can stand in the way of the movement of the moveable part. In accordance with the invention, video cameras capture the occupation of the space by objects using volume elements. It is possible to determine at a target movement of the moveable part which volume elements are passed through during this. If one of these volume elements proves to be a volume element occupied by an object, the movement of the moveable part is prevented, otherwise it is enabled or actively implemented.

Abstract: A method and system for intraoperative guidance in an off-pump mitral valve repair procedure is disclosed. A plurality of patient-specific models of the mitral valve are generated, each from pre-operative image data obtained using a separate imaging modality. The pre-operative image data from the separate imaging modalities are fused into a common coordinate system by registering the plurality of patient-specific models. A model of the mitral valve is estimated in real-time in intraoperative image data using a fused physiological prior resulting from the registering of the plurality of patient-specific models.

Abstract: The method includes using an angiography recording system to record a series of projection images of the organ or hollow organ of an examination object during a contrast-agent wash-in or wash-out process; using a CT recording system to record and reconstruct a 3D volume image of the organ or hollow organ of the examination object; at least partly superposing the series of projection images or image sections from the series of projection images on the 3D volume image; and displaying the 3D volume image on which the projection images are superposed.

Abstract: A method is proposed for collimating an off-center sub-object of an examination subject by a collimator of an X-ray diagnostic apparatus. The apparatus has a computed tomography imaging system having a first X-ray source and a computed tomography X-ray detector disposed opposite the first X-ray source having a number of individual detectors and an angiographic imaging system having a second X-ray source offset to the first X-ray source and a flat panel X-ray detector disposed opposite the second X-ray source with matrix shaped pixel elements. A 3D image of the subject is taken by the CT imaging system. The off-center sub-object is selected based on the 3D image. The position of the sub-object is determined for a shooting position of the angiographic imaging system according to the fixed relative disposition between the angiographic imaging system and the CT imaging system. The collimator is adjusted accordingly for collimating the off-center section.

Abstract: A method for overlaying a 3D volume image of a CT recording system and a 2D projection image of an angio recording system of an X-ray diagnostic facility including a rotatable gantry. The method includes providing a 3D volume image of an examination object reconstructed from a data record of the CT recording system and recording a 2D projection image of the examination object using the angio recording system. The method also includes determining a projection direction of the recorded 2D projection image in relation to the 3D volume image, based on the geometric arrangement between the recording systems. The method still further includes simulating a 2D projection image from the 3D volume image for the determined projection direction and matching the recorded 2D projection image and the simulated 2D projection image. The method includes overlaying the recorded 2D projection image and the 3D volume image, based on the matching.

Abstract: The invention relates to a method for reducing image noise in the context of capturing at least one radiation-based image of a region of interest using two different radiation spectra, in particular two different x-ray radiation spectra, comprising the following steps: capturing raw images of the region of interest using the two different radiation spectra with in each case mutually paired measured values; and to separate different materials in the region of interest, applying to the captured raw images at least one inversion operator with integrated noise filtering, said operator describing a transition from a measured value pair to an assigned reconstruction value pair.

Abstract: A fastening device connecting two flaps of a mitral valve of a human heart is provided. The fastening device has a pair of fixing arms each with a connection side. The fixing arms are connected to each other at a first end by a joint and each have a second free end. The fixing arms are able to be moved from an opened position, in which the connecting sides enclose an angle of at least 5° to each other, into the closed position in which the connecting sides rest essentially in parallel on one another. The fastening device has grip elements, which together with the fixing arms, at least partly connect the two flaps of the mitral valve in the closed position of the fixing arms. The fastening device has a position detection system which measures the spatial position and the orientation of the fastening device.

Abstract: A microcapsule for the local treatment of a tumor is proposed. The microcapsule has a support material forming a casing for the microcapsule, an active agent that damages tumor cells, a marker material suitable for use as an x-ray marker, and at least one magnetic nanoparticle. The active agent in particular destroys the tumor cells.

Abstract: A computer receives a plurality of two-dimensional fluoroscopy images of an examination object, capture time points and projection parameters and combines the images into image groups. Each image group contains all the images, the capture time point of which is between a minimum and a maximum time point specific to the respective image group. When the image groups are sorted by ascending minimum time points, the corresponding maximum time points form a strictly monotonously ascending order. The respective minimum and maximum time points are determined so that the computer reconstructs a three-dimensional object reconstruction of the examination object based on the images assigned to the respective image group. A respective two-dimensional reconstruction display is determined by the respective three-dimensional object reconstruction and outputted to a user in a coding specific to the respective image group by a display device.

Abstract: The invention relates to a method for presenting interventional instruments in a 3D data set of an anatomy to be treated. A 3D data set of the anatomy is recorded before introduction of an interventional instrument. Once the interventional instrument has been applied, the spatial position of the instrument is determined by x-ray fluoroscopy from images created at two different angulations. A 3D model of the instrument is formed from the x-ray images. The 3D model of the instrument is fused with the 3D data set of the anatomy. A 3D hologram is reproduced from the fused 3D data set. The 3D hologram is repeatedly reproduced in real time to follow the application of the instrument in the presentation.

Abstract: A method for guiding nanoparticles to a target location by a magnetic gradient field and/or holding them at the target location is proposed. The magnetic gradient field is generated by a magnet system with at least one magnet. A focus of the magnet system is registered with an X-ray device. At least one three-dimensional image dataset showing the target location is captured by the X-ray device. The position of the target location is determined manually and/or automatically in the image dataset or in an image dataset determined therefrom and is positioned automatically based on the registration of the focus so that the focus coincides with the position of the target location.

Abstract: A method for guiding stent deployment during an endovascular procedure includes providing a virtual stent model of a real stent that specifies a length, diameter, shape, and placement of the real stent. The method further includes projecting the virtual stent model onto a 2-dimensional (2D) DSA image of a target lesion, manipulating a stent deployment mechanism to navigate the stent to the target lesion while simultaneously acquiring real-time 2D fluoroscopic images of the stent navigation, and overlaying each fluoroscopic image on the 2D DSA image having the projected virtual stent model image, where the 2D fluoroscopic images are acquired from a C-arm mounted X-ray apparatus, and updating the projection of the virtual stent model onto the fluoroscopic images whenever a new fluoroscopic image is acquired or whenever the C-arm is moved, where the stent is aligned with the virtual stent model by aligning stent end markers with virtual end markers.

Abstract: An imaging method for representing results of intravascular imaging (IVB) and CFD results of plaques of a vascular vessel tree of a patient and an imaging medical system for execution of the method are proposed. A 3-D image data set of the area under examination is acquired with x-ray beams for the generation of 3-D x-ray images. A 3-D reconstruction image of the area under examination is generated from the 3-D x-ray images. IVB images are generated by intravascular imaging. Larger calcified plaques in the 3-D x-ray images and IVB images are identified for determining orientation points or landmarks. The spatial position of the plaques are correlated and/or registered based on the orientation points or landmarks. The IVB image data and 3-D image data are fused and reproduced.

Abstract: An imaging method for enhanced visualization of vessels in an examination region of a patient, in particular during an intervention, is proposed. A 3D reconstruction image of the examination region is generated using a preoperatively recorded 3D image dataset of the examination region. At least one current 2D fluorescence image of the examination region is recorded by a fluorescence angiography. The vessels are identified. The 3D image dataset with the image dataset of the 2D fluorescence or ultrasound image is registered based on the result of the identification. The 3D reconstruction image and the 2D image are overplayed. The overlaid images are 3D played back.

Abstract: A method for operating a computer system for supporting an insertion of a guide wire into body tissue is proposed. An interventional procedure is prepared for by the insertion of the guide wire into body tissue. The guide wire is fitted with sensors. The latter's signals are received using the proposed method, so that a comparison of actual values with target values is possible and a future target direction of movement can be derived.