Abstract: The invention relates to a method for presetting the imaging parameters during the generation of two-dimensional fluoroscopic x-ray images of a patient, wherein the optimally necessary dose for the fluoroscopic x-ray image is determined with the aid of a 3D representation, already present from prior examinations, of the internal structure of the patient and the intended imaging direction and this dose is used for the exposure of the fluoroscopic image.

Abstract: In order to improve the quality of cross-sectional images, which have been recorded along a longitudinal axis of a vessel of a body, it is proposed to add successive cross-sectional images to an overall cross-sectional image. Artifacts in the cross-sectional images are hereby weakened and pathological structures to be detected are high-lighted.

Abstract: In a method for mathematical compensation of a periodic movement of an organ in a first image-generation method used to image said organ, two time series of three-dimensional image data are acquired using gating, one by the first image-generation method and one by the second image-generation method, the image data that have been acquired by the second image-generation method being used to calculate motion fields which are applied for the compensation of the data from the time series which was acquired by the first image-generation method. The compensation encompasses the mathematical inclusion of motion fields and the mapping of the image data to a reference time. All the image data mapped back to the reference time are added together.

Abstract: The invention relates to a device for making visible a pathological change in a part of a patient's body labeled with a fluorescent dye, the device having: a first selectable light source (11, 17), which emits light in the excitation wavelength range of the fluorescent dye, in order to trigger the emission of light in the emission wavelength range of the fluorescent dye, a second selectable light source, which emits visible light outside the emission wavelength of the fluorescent dye, and a means for selectively switching the first and the second light source on and off.

Abstract: A method and a suitable x-ray device (1) for carrying out the method are specified for effective and operationally simplified user-specific optimization of a parameter configuration (K) of an x-ray device (1), said configuration comprising at least one recording parameter (U,I,t,F). It is accordingly provided that a user (20) is shown a plurality of reference images (V, V1) for different reference parameter sets (PV) from a reference memory (21) in which are stored a large number of reference images (V, V0) each with an associated reference parameter set (PV), that for each reference image (V, V1) shown the user (20) submits an assessment (BM) of the image quality (V, V1), and that on the basis of the submitted assessments (BM) an optimized parameter configuration (K) is created from the reference parameter sets (PV) of the reference images (V, V1) shown.

Abstract: Method for compensating for image faults in a digital image recording which has been created by an x-ray system consisting of a radiographic source, an anti-scatter grid and a digital x-ray detector such as an image amplifier or a solid-state image detector, said image faults resulting from decentering, defocusing or defects in the anti-scatter grid or by the Heel effect and causing an intensity reduction of the primary radiation falling on the x-ray detector, characterized in that the actual reduction in intensity is measured through the anti-scatter grid and correction parameters are determined based on the measured values recorded which are then used to correct the x-ray image recording.

Abstract: The invention relates to a method for the merged display of first image information captured using a first imaging device with second image information captured using a second imaging device, whereby said image information relates to the same area of examination in the human or animal body, in particular a hollow organ, in which method: a plurality of individual, two-dimensional images of the area under examination are recorded in the form of fluorescence images by light-excitation of fluorescent areas of the area under examination, using a medical instrument to be introduced invasively into the area under examination, in particular a catheter, a 3D fluorescence image data record, suitable for the three-dimensional reconstruction of a fluorescence three-dimensional image of the area under examination, is generated from the individual two-dimensional images, a further 3D image data record of the area under examination recorded using a further examination procedure, said further 3D image data record being suita

Abstract: The present invention relates to a method for imaging using an image-generating, endoluminal instrument (1) by means of which a sequence of 2D image data of a hollow channel (2), in particular a vessel, of an object under investigation is recorded, wherein the images are recorded in a known temporal relation to a periodic movement of the object under investigation and spatial coordinates of the image are captured by means of a position sensor during each recording of an image (5) and stored as position data (9, 10) together with the 2D image data of the image (5). The method is characterized in that first position data (10) which does not lie in a predefinable movement phase of the object under investigation is corrected, before or after being stored, by interpolation between second position data (9) which does lie in the specified movement phase and/or by subtraction or addition of predetermined values.

Abstract: The present invention relates to a method for registration of a sequence of 2D image data (5) of a hollow channel (2), in particular of a vessel, recorded with an imaging endoluminal instrument (1) when the relative displacement positions of the instrument (1) in the hollow channel (2) are known, with 3D image data (8) of the hollow channel (2). In the method a three-dimensional path of a central axis (10) of a definable section of the hollow channel (2) is determined from the 3D image data (8), the three-dimensional path of the central axis (10) is converted into a rectilinear path by a first transformation of the 3D image data (8) of the definable section of the hollow channel (2) and transformation parameters required for the first transformation are stored.

Abstract: The device according to the invention ensures accurate and in particular sensitive navigation of the probe, which can be inserted into a body, despite the fact that the remote control uses simple means, by means of a movement (MR;MB;MP) corresponding intuitively to the navigation of a probe using the control device (1). Intuitive operation can be converted in particular using an inventive U-shaped embodiment of the control device (1). Sensitive controllability can be increased by transmitting the mechanical interaction between the probe and an environment under examination to the control device (1) and thus directly to the operating hand (3) by means of inventive feedback.

Abstract: Catheter device comprising a catheter, in particular an intravascular catheter, for insertion into an area being examined, in particular into a vessel or cavity-containing organ in the body of a person or animal, wherein in the area of the catheter tip a device (3) is provided for emitting excitation light for light-optically exciting an area being examined surrounding said catheter tip, furthermore a device (3) is provided for collecting response light emitted, owing to excitation, from the area being examined, and furthermore a position sensor (13, 24, 27) is provided enabling said catheter tip's spatial position and/or orientation to be registered in a system of coordinates of a position-registering system (7, 14).

Abstract: In a method and a device to localize regions in a biological tissue section, at least during the examination the tissue section exhibits one fluorescence property differing from the tissue section, due to which, given an exposure with light of a first wavelength, light of another wavelength is emitted.

Abstract: In an imaging method, an object to be examined is treated with an optically activatable contrast medium and illuminated via a plurality of LEDs. Luminescent light excited by the irradiation is detected by a detector. The LEDs have emission wavelengths preferably different from one another. There are preferably different spectral filter combinations present that respectively include as a structural unit, an excitation filter for selecting an excitation wavelength from the radiation output by the excitation source, and a luminescence filter for filtering out wavelengths above the expected emission maximum of the luminescent light.

Abstract: An image analysis process is for in vivo small animal imaging, and an apparatus is for image evaluation for the in vivo small animal imaging, for automatic evaluation of two-dimensional and/or three-dimensional images. One-dimensional, two-dimensional or three-dimensional image data are read and the image data are segmented on the basis of image data characteristics, into segments. The image data characteristics represent areas of interest for the small animal. Cohesive areas are formed, carried out by association of the segments on the basis of association criteria. After the filtering of the cohesive areas and analysis on the basis of analysis criteria, changes in the areas of interest for the small animal can be detected automatically and quickly on the basis of an experimental databank, without any manual action or medical estimation being necessary.

Abstract: A method and a device are for stabilizing living beings, in order to examine a living being to be examined by way of an examination instrument during a predeterminable time period in an examination area. To this end, the living being is enclosed by way of at least two gates in the examination area during at least the predeterminable time period &Dgr;t needed for the examination. As such, anesthesia can be obviated.

Abstract: For the purpose of more accurate and more rapid nonmagnetic identification of organisms by way of a marking code on a marking element that can be provided on the organism, use is made of a marking code. The marking code is composed of regions with numerous different optically detectable and machine evaluatable criteria. In this case, annular marking elements made from non-magnetizable material are preferred.