Abstract: There is described a radiography device for recording dynamic processes and an associated recording method. The radiography arrangement is used to examine patients using an x-ray source, a digital flat detector with a single shot recording function and an operating console for controlling and recording purposes, with the flat detector also being able to display an image sequence at a rate of up to 5 Hertz, which allows the positioning of the region to be examined or the monitoring of pseudo-interventional interventions.

Abstract: According to at least one embodiment of the invention, the measurement of an image dose is performed in the flat X-ray detector itself. The flat X-ray detector, in at least one embodiment, has a scintillator that converts the incident X-rays into light. The actual image signals are then generated in a light converting layer. A portion of the light generated by the scintillator is branched off, with the use of fiber optic elements, to at least one photocounter. The fraction of the branched off light is fixed, that is to say a measured value determined by the photocounter is proportional to the image dose. It is thereby possible to determine the image dose provisionally during image recording, and to intervene for control purposes by, if appropriate, changing the image recording period (beam time on X-ray tube) and the operating voltage of an X-ray tube during the image recording.

Abstract: Disclosed is a patient table for an x-ray system with a table top, the length of which can be optionally varied. The table top can be of a modular design, or can comprise a plurality of table segments or slats depending on the type of x-ray device used.

Abstract: A detector holder for a flat panel x-ray detector has a mechanical plug interface that allows flat panel x-ray detectors of respectively different types to be connected to and held by the detector holder. An x-ray system equipped with such a detector holder can be used flexibly for different applications respectively requiring different types of flat panel x-ray detectors. The type of the flat panel x-ray detector currently retained by the detector holder can be automatically detected and used by the data processor that processed output signals from the currently-employed flat panel x-ray detector.

Abstract: For the purpose of noise correction for an x-ray flat-panel detector (2) it is firstly provided that in the dark image—without radiation impinging on the detector panel (4)—the noise is recorded for the subareas of an active area (8) and from this, subarea-specific correction factors are determined by means of which the respective signal value of the respective subarea is corrected in imaging operation. A dark area correction factor (DF1, DF2) is also determined in each case from the noise of two dark areas (6) that are spaced apart with respect to each other. In order to determine subarea-specific signal correction factors (SK), each of the DA correction factors (DF1, DF2) is weighted with a subarea-specific weighting factor (g1, g2), in particular a distance factor (a). By means of said measure improved noise correction is achieved.

Abstract: By a contrast means contained in an inventive stent which has a greater permeability for x-radiation features than the body tissue surrounding the stent in a relevant body conduit, this stent can be clearly detected in its position on an x-ray image of the relevant body conduit while at the same time exhibiting good biological compatibility; a gas, especially one contained in cavities of the stent is provided as a contrast means. The inventive production method for this stent with the aid of a catheter embodied specially for the purpose enables the production of the stent from a malleable polymer mass in the relevant body conduit so that the stent is adapted especially precisely to the shape of the relevant body conduit.

Abstract: In flat-panel X-ray detectors which have a multiplicity of detector elements which are in each case associated with one pixel of an X-ray image, the individual detectors generate offset signals. These offset signals are detected by recording offset images in which there is no X-ray irradiation (dark images). The offset images are recorded after the X-ray images to be corrected in time. If for each X-ray image record, an associated offset image record is generated by using a single offset image or of two, the offset images can be recorded closely in time. Ghosting effects are then not disturbing because the offset images are only used for correcting the X-ray images which cause the ghosting.

Abstract: During tomosynthesis a plurality of x-ray images is acquired. The angular position of the x-ray tube is changed from x-ray image to x-ray image. Absorption in the imaged object (patient) and also in the patient table changes as a function of the angle. To compensate for this, backlight is applied while the x-ray images are being acquired. The intensity of the back light is selected as a function of the angle of the x-ray tube to the normal of the flat x-ray detector. Backlight can also be directed during reading, with only the areas already read in each instance being irradiated.

Abstract: In order to determine the quality of a butting during the manufacture of a flat X-ray detector, it is sufficient for the mounting plate of the detector to be produced with detector plates which are connected by butting, and for a backlight board to be provided in order to illuminate the pleats through the mounting substrate. At least one backlight image is recorded with the aid of the backlight board and the detector plates, and is evaluated automatically in order to determine whether, in the zone of the image of the butting structure, it has areas which are illuminated more than averagely strongly or weakly, based on a predetermined assessment criterion. This may result in the determination of artifacts, which are characterized by the so-called light-and-shadow effect. It is thus possible to determine during manufacture whether the butting is sufficiently good to continue the detector manufacturing process, or not.

Abstract: To comply with radiation protection provisions that differ from one another for different operating functions without operational restrictions, a radiation protection system is provided in the case of a multifunctional x-ray system for a solid state detector assigned to the x-ray system. The radiation protection system includes a device for restricting the current outer contours of an x-radiation field to bounding outer contours dependent on the selected operating function of the x-ray system.

Abstract: In a method to create a gain-corrected x-ray image with the aid of a flat-panel x-ray detector a number of gain images are determined on calibration and this is done for different measurement situations which correspond to different settings of specific x-ray imaging variables such as the angle of the flat-panel x-ray detector to an x-ray tube, the energy of the x-radiation used etc. Instead of the usual gain image for each element of the detector, a gain value is then used in the gain correction which is produced from an interpolation of the corresponding values from the number of gain images.

Abstract: In order to increase the useful surface of an X-ray detector, in particular a flat image detector, a method is provided for gain calibration of an X-ray imaging system with a digital X-ray detector including an active matrix having pixel readout units. Pixels are read out from the pixel readout units, and a brightness drop below a defined threshold is determined for the read out pixels by an image processing unit. The pixel readout units having a brightness drop below the defined threshold are specified with regard to a cause of the brightness drop. Further, as a function of the specification, it is defined for which image raw values, subsequently read out from the affected pixel readout units, a gain correction is to be undertaken.

Abstract: In order to achieve a consistently good image quality, an X-ray device has an X-ray source in the form of an X-ray radiator (1) and an X-ray detector (2) with a precisely defined mutual arrangement, and a subsystem (5-7; 10-11) for detecting any deviation between the actual mutual arrangement and the precise mutual arrangement of X-ray source and X-ray detector (2). Optical detection of deviations is preferably provided.

Abstract: According to at least one embodiment of the invention, the measurement of an image dose is performed in the flat X-ray detector itself. The flat X-ray detector, in at least one embodiment, has a scintillator that converts the incident X-rays into light. The actual image signals are then generated in a light converting layer. A portion of the light generated by the scintillator is branched off, with the use of fiber optic elements, to at least one photocounter. The fraction of the branched off light is fixed, that is to say a measured value determined by the photocounter is proportional to the image dose. It is thereby possible to determine the image dose provisionally during image recording, and to intervene for control purposes by, if appropriate, changing the image recording period (beam time on X-ray tube) and the operating voltage of an X-ray tube during the image recording.

Abstract: A plurality of plates is bonded together by butting in order to manufacture a flat-plate x-ray detector. The butting determines artifacts in x-ray images taken with the flat-plate x-ray detector. According to the invention the butting structure is first measured in the flat-plate x-ray detector and a pixel quantity parameter is determined for an interpolation, whereby said parameter can be small for a narrow butting structure and large for a wide butting structure. Accordingly an interpolation of pixel data in x-ray images which have been taken is performed on the basis of the pixel quantity parameter, preferably by row or by column.

Abstract: The invention relates to a method for operating a technical medical system during a medical procedure, wherein a parameter correlated with the quality of the performance of the procedure is continuously registered while the procedure is being performed, the parameter is evaluated based on a quality criterion correlated with the procedure's fault-free performance, and an auxiliary procedure for the medical procedure is initiated as soon as the parameter has violated the quality criterion. The invention also relates to a technical medical system for performing a medical procedure according to the inventive method.

Abstract: In flat-panel X-ray detectors which have a multiplicity of detector elements which are in each case associated with one pixel of an X-ray image, the individual detectors generate offset signals. These offset signals are detected by recording offset images in which there is no X-ray irradiation (dark images). The offset images are recorded after the X-ray images to be corrected in time. If for each X-ray image record, an associated offset image record is generated by using a single offset image or of two, the offset images can be recorded closely in time. Ghosting effects are then not disturbing because the offset images are only used for correcting the X-ray images which cause the ghosting.

Abstract: There is described a radiography device for recording dynamic processes and an associated recording method. The radiography arrangement is used to examine patients using an x-ray source, a digital flat detector with a single shot recording function and an operating console for controlling and recording purposes, with the flat detector also being able to display an image sequence at a rate of up to 5 Hertz, which allows the positioning of the region to be examined or the monitoring of pseudo-interventional interventions.

Abstract: To reduce quality losses in edge areas of an X-ray image, caused by temperature fluctuations, an X-ray detector (1) is arranged with a scintillator (2) for converting X radiation into light and with an active matrix (3) of pixel readout elements, arranged behind it in the direction of X radiation, in such a manner that the active matrix (3) is shielded in an optically opaque manner with respect to the scintillator (2) in at least one edge area (6) of the cross-over area of the scintillator (2) and the active matrix (3); in particular, the optically opaque shielding is suitable for forming a dark reference zone (5) when the scintillator (2) is present.

Abstract: A rotary piston x-ray tube has a piston formed by a case wall and support such that it can rotate around a rotational axis. The piston contains a cathode and an anode. To improve cooling, the anode of the rotary piston x-ray tube forms a radially-rotating section of the shell wall.