Abstract: An x-ray system features a control device (6), a data storage device (12) and two x-ray units. Each x-ray unit features an x-ray source (1,3) and an x-ray detector (2,4) which can be pivoted around a pivot axis (5) and are arranged opposite one another in relation to the pivot axis (5) in each case. An object (10) can be arranged in the area of the pivot axis (5). The control device (6) controls the x-ray units so that they are simultaneously pivoted by the pivot angle (??,??) around the pivot axis (5). In this case images of the object (10) are recorded by means of the x-ray detectors (2,4) at angular positions (?i,?j) and conveyed to the data storage device (12). The pivot angle (??,??) and the angular positions (?i,?j) are determined here such that, on the basis of the recorded images of the object (10), at least one 3D reconstruction of the object (10) can be determined which also occurs afterwards.

Abstract: An intuitively manageable method for adjusting at least one parameter (X) that determines the image quality of an X-ray image produced by an X-ray device (1) is provided, wherein, on a user interface (18) of the X-ray device (1) a setting zone (25) for the parameter (X) is shown pictorially, and in relation to the setting zone (25) the current setting (Xact) of the parameter (X) is likewise shown pictorially. At least two sub-zones (32, 33, 34) of the setting zone (25) are differentiated from each other by color, wherein a first sub-zone (32) corresponds to a parameter-setting that guarantees good image quality and a second sub-zone (34) corresponds to a parameter-setting that is critical for the image quality.

Abstract: A method is provided to image an organ of the human or animal body using and acquisition device rotating over an angle, in that the rotation speed of the rotating acquisition device is modulated dependent on a reference signal that represents a current movement state of the organ to be imaged. Additionally or alternatively, the measurement interval in which the acquisition of the organ ensures during the rotation can respectively be adapted using the reference signal to a cycle duration of the movement of the organ to be imaged. Moreover, a corresponding apparatus to implement such a method is provided.

Abstract: An x-ray diagnostic apparatus has an x-ray radiator, a control device connected thereto, a radiation detector and a patient-positioning table. The x-ray diagnostic apparatus has a device that calculates the BMI (body mass index) of the patient to be examined from detection of the body length and the weight. The device is connected with the control device to influence the parameters associated with obtaining an x-ray image.

Abstract: A medical examination and/or treatment system has an x-ray image acquisition system with a radiation source, a radiation receiver, as well as a control and processing device (with an image generation device) for controlling the source and receiver, a catheter system with an associated image acquisition system for optical coherence tomography, including a catheter with an optical fiber, via which light is guided to and radiated into the region of the catheter tip that is introduced into an examination region, and via which reflection light from the illuminated examination region is guided to a control and processing device with image generation device of the image acquisition system, as well as at least one monitor to present the x-ray images and coherence tomography images.

Abstract: In a method and device for, generating computed tomography images of a periodically moving organ of an organism, the organ having regions with rest phases and movement phases and the rest phases of different regions ensuing at different points in time, an x-ray source is moved around the body of the organism to be examined to generate projections serving for the image generation during at least one rotation of the x-ray source around the subject to be examined and during a duration that is at least equal to a period of the motion. The projection data are analyzed as to whether the data were acquired during a rest phase or movement phase of a respective region of interest of the organ, and an image of the organ is reconstructed using only data acquired during a rest phase of a respective region of interest of the organ.

Abstract: The invention relates to a method for operating a computed tomogram (CT) device by means of which volume data pertaining to a volume area of a test object can be recorded. According to the inventive method, a marking for identifying a reconstruction area to be reconstructed is faded into an X-ray shadow image containing the volume area, whereby a split image of the beginning and/or end of the reconstruction area is reconstructed from the volume data in order to verify the position of the reconstruction area.

Abstract: In a method for the operation of a CT apparatus with which volume data for a volume region of an examination subject are registered, markings for identifying reconstruction regions are mixed into an x-ray shadowgram containing the volume region. The reconstruction of image data with respect to each reconstruction region ensues taking reconstruction parameters allocated to the respective reconstruction region into consideration.

Abstract: In a computed tomography apparatus, and a method for operating same, for obtaining cardiac images, a spiral scan of a measurement volume containing a patient's heart is conducted, the production of the scanning data during the spiral scanning being synchronized with an ECG signal from the patient, in order to produce a graphic representation of the examination volume, and thus an image of the patient's heart. The ECG signal is employed to control the generation of the data during the spiral scanning at phase of the cardiac cycle wherein minimum movement of the heart takes place. The chronological correlation between the recording of the scanning data and the ECG signal is fixed, so that within each number of successive time intervals, a dataset is obtained completely within that time interval. The datasets from the successive time intervals are then combined to produce an image of the heart.

Abstract: In a method for the operation of a CT apparatus with which volume data for a volume region of an examination subject are registered, markings for identifying reconstruction regions are mixed into an x-ray shadowgram containing the volume region. The reconstruction of image data with respect to each reconstruction region ensues taking reconstruction parameters allocated to the respective reconstruction region into consideration.

Abstract: An X-ray computed tomography apparatus having a two-dimensional detector allows X-ray shadowgraphs to be alternatively produced with using one or several detector rows. For this purpose, a slot diaphragm near the tube and a slot diaphragm near the detector are provided. For the superposition of the shadowgraphs of the individual detector rows, an on-line computing method is used that includes a deblurring filter for the reduction of image blurring due to table motion, and a method for scatter radiation correction in a multirow or matrix detector.

Abstract: A computed tomography apparatus has a surface X-ray detector composed of detection elements, with all detectors being usable in a spiral scan wherein the detector and an X-ray radiator are rotated around a system axis. The detector has a symmetry axis tilted relative to the system axis by a non-zero acute angle, this angle can be adjustable, including being settable to a value of zero for conducting a conventional spiral scan.

Abstract: An apparatus for examining tissue with light, for identifying inhomogeneities, such as tumors, in the tissue, bidirectionally transirradiates the tissue with light, and detects the light emerging from the tissue in the two directions, thereby providing different images of the tissue with the inhomogeneities therein represented with different contrast, thereby making identification of the inhomogeneity easier.

Abstract: In an apparatus and method for examining tissue by transillumination of the tissue, light having different, defined wavelengths is emitted from a plurality of monochromatic light sources into tissue under examination, the light emerging from the tissue is detected by a detector arrangement for detecting the parts of the emitted light transmitted by the tissue, and signals from the detector arrangement are supplied to an evaluation unit. The evaluation unit calculates data with respect to the concentration of the different tissue components in the tissue under examination from the different signals on the basis of stored data that correspond to the light absorption of different tissue components.

Abstract: An x-ray examination apparatus with a detector array having a number of detector elements includes a data correction computer in which the subject-scattered radiation can be numerically determined and corrected. The forward scatter intensity is determined by multiplication of the measured intensities, windowed with a window function, with the natural logarithm of the intensity normalized with the unattenuated primary intensity. The subject-scattered radiation can then be calculated and corrected through filtering of the forward scatter intensity with a convolution kernel and a suitable scaling.

Abstract: In a process for localizing a scintillation event in a gamma camera having a plurality of photomultipliers forming a camera surface, each photomultiplier generating an output signal in response to the scintillation event, wherein a plurality of comparative signal sets are generated from output signals of the photomultiplier corresponding to respective scintillation events of known location, a location-dependent probability function is formed based on a comparison of the outputs of the photomultipliers for a scintillation event of unknown location with the comparative signal sets, and the location of the scintillation event of unknown location is defined as the location corresponding to the maximum of the probability function, the speed with which the localization is accomplished is increased by initially defining a portion of the total gamma camera surface in which there is a high probability that the location of the scintillation event of unknown origin lies, and limiting the investigation for the location o

Abstract: In a method for the localization of scintillation events in a gamma camera with a number of photomultipliers the output signals of the photomultipliers, in dependence on a release signal, are subjected to a pattern recognition process. In the pattern recognition process the output signals are compared with comparative signal sets which each comprise the expected values of output signals from photomultipliers which would be generated by several comparative scintillation events with at respective origins at known locations. The locations of the multiple scintillation events are then registered as the origins that belong to a comparative signal set which presents the greatest similarity value to the output signals in question.