Abstract: Systems and methods for a good x-ray quality with as low a radiation exposure for a patient as possible. The method provides control settings for recording a series of x-ray images by an x-ray device during a flow of contrast agent through a liquid-filled hollow organ of a patient.

Abstract: In order to achieve effective cooling, an X-ray emitter with a tube housing having a vacuum is provided. At least one anode is arranged in the tube housing, such that the anode is irradiated by an electron beam generated in a cathode and accelerated through an electrical field. The anode is excited, such that an X-ray deceleration radiation is emitted. The X-ray emitter has a thermoelectric converter (e.g., at least one thermophotovoltaic cell) for generating electrical energy. The thermoelectric converter is arranged, such that the thermoelectric converter may be irradiated at least in part by a heat radiation emanating from the anode.

Abstract: A method is provided for reducing image errors (e.g., grid artifacts) caused by an anti-scatter grid in an X-ray image that has been recorded with an X-ray facility having an anti-scatter grid. The method includes: receiving an X-ray image that has been recorded while making use of an anti-scatter grid; generating an intermediate image by applying a logarithm transformation to the X-ray image; receiving at least one eigenvector or eigenvector image of the anti-scatter grid established by way of principal component analysis; adapting the at least one eigenvector or eigenvector image to the intermediate image; establishing a weight for at least one eigenvector or eigenvector image dependent upon the result of the adaptation; generating a corrected intermediate image by subtracting the at least one weighted eigenvector or eigenvector image from the intermediate image; and generating a corrected X-ray image by applying the inverse logarithm transformation to the corrected intermediate image.

Abstract: A method for correcting an X-ray image that is based on imaging during a first time interval and indicates a respective X-ray image value for at least one image point includes receiving a plurality of dark images. A respective dark image is based on image data capturing during a respective subinterval of a second time interval preceding the first time interval, during which no X-rays are irradiated onto an X-ray detector, and indicates a respective dark image value for the respective image point. A respective afterglow value is predicted for the respective image point in the X-ray image, in dependence on the dark image values of a plurality of the dark images for the respective image point. The X-ray image is corrected by ascertaining a respective corrected X-ray image value for the respective image point in dependence on the respective X-ray image value and the respective afterglow value.

Abstract: One or more example embodiments relates to a method for generating X-ray radiation having an X-ray characteristic, the method comprising providing a first type of examination information and a second type of examination information for selection; receiving the selected type of examination information in a controller; selecting an X-ray emitter configuration from a plurality of X-ray emitter configurations as a function of the received type of examination information via the controller; determining a control signal as a function of the selected X-ray emitter configuration; automatically adjusting a mechanical adjuster of the X-ray emitter according to the determined control signal to change an orientation of the X-ray emitter in relation to the recording area; and generating X-ray radiation with the X-ray characteristic via the X-ray emitter set for fluoroscopy of the examination object in the recording area.

Abstract: A method for generating result image data from origin data includes a part algorithm generated as a function of input data and a parameter setting generated as output data. The parameter setting of at least one part algorithm is predetermined as a function of a control parameter of an overall processing algorithm. First and second limit values are assigned first and second values of the parameter setting, wherein that of the first value for the at least one part algorithm leads to the output data of the at least one part algorithm deviating more greatly from the input data of that of the part algorithms or from reference data, which would result on application of a reference algorithm assigned to the at least one part algorithm to this input data, than with using the second value of the parameter setting of the respective part algorithm.

Abstract: For particularly rapid and effective scattered-radiation correction of 2D X-ray images, a method is provided for scattered-radiation correction for an X-ray image or a series of X-ray images, which images may be acquired by an acquisition system having an X-ray source, an X-ray detector, and a collimator that shapes the primary X-ray radiation. The method includes: providing the X-ray image acquired in a first setting of the collimator in which setting the object under examination is illuminated; providing an auxiliary X-ray image acquired in a second setting of the collimator in which second setting are illuminated, in particular solely one or more sub-regions of the X-ray detector; subtracting the auxiliary X-ray image from the X-ray image; determining a scattered-radiation correction using image data from the X-ray detector obtained from the subtraction at least in the region of the sub-regions; and correcting the X-ray image using the determined scattered-radiation correction.

Abstract: For automatically determining an operation mode for an X-ray imaging system that includes an X-ray source and an X-ray detector mounted on a C-arm, angulation data defining an angulation state of the C-arm is received, and at least one X-ray image depicting an object according to the angulation state is received. The operation mode for the X-ray imaging system is selected as one of two or more predefined operation modes by applying a trained machine learning model for classification to input data. The input data includes the at least one X-ray image and the angulation data.

Abstract: One or more example embodiments relates to a method for generating X-ray radiation having an X-ray characteristic, the method comprising providing a first type of examination information and a second type of examination information for selection; receiving the selected type of examination information in a controller; selecting an X-ray emitter configuration from a plurality of X-ray emitter configurations as a function of the received type of examination information via the controller; determining a control signal as a function of the selected X-ray emitter configuration; automatically adjusting a mechanical adjuster of the X-ray emitter according to the determined control signal to change an orientation of the X-ray emitter in relation to the recording area; and generating X-ray radiation with the X-ray characteristic via the X-ray emitter set for fluoroscopy of the examination object in the recording area.

Abstract: Systems and methods for visualizing scattered X-rays is provided for protecting medical staff during an examination with X-rays when an examination object is irradiated with X-rays emitted by an X-ray tube of an X-ray device. The method includes irradiating the examination object with the X-rays emitted by the X-ray tube, thereby producing scattered X-rays, ascertaining signals representing radiation from an initial radiation spectrum, wherein the radiation from an initial radiation spectrum has been produced by scintillation of the scattered X-rays in a gaseous scintillator in the form of nitrogen present in the ambient air, and outputting at least one image ascertained from the signals.

Abstract: In an X-ray imaging procedure, an input image and an input mask image are generated on the basis of first and second detector data of an X-ray flat panel detector. By applying noise suppression, a mask signal image and a signal image are generated on the basis thereof. By calculating the difference between the signal image and the mask signal image, a subtraction image is generated. The subtraction image is scaled so that a number of pixels is increased in a first image direction. A results image is generated in which the scaled subtraction image and a noise image are added together.

Abstract: A method for alternately displaying graphical representations includes: a) providing a first image that includes a presentation of an anatomical structure of an object of interest; b) providing a second image that reproduces a spatial and/or time-related change in the object of interest; c) displaying a graphical representation of the first or second image on a display surface of a display unit; and d) displaying a graphical representation of the respective other image on the display surface of the display unit, wherein acts c) and d) are carried out one after the other and acts b) to d) are carried out repeatedly.

Abstract: A technique for controlling a compensation actuator system for compensating a shadow of an X-ray scattered radiation absorption grid in an X-ray image recorded with a pivotably mounted X-ray device, for example in real time, includes a method with a step of receiving motion state data indicative of a motion state of an X-ray device. The X-ray device is mounted on a pivotable arm. The motion state is assigned to a time of recording of an X-ray image by the X-ray device. A quality measure of the X-ray image with respect to a shadow of an X-ray scattered radiation absorption grid, which is arranged on the detector of the X-ray device, is determined. A control signal for a compensation actuator system for adjusting the position of the X-ray scattered radiation absorption grid is determined depending on the received motion state data and depending on the determined quality measure. Determining the control signal comprises optimizing the quality measure.

Abstract: A computer-implemented method for evaluating an X-ray image includes: segmenting the hollow organ structure in the X-ray image; determining center lines and edge boundaries of the segmented hollow organ structure and ascertaining a diameter of each hollow organ along its center line; ascertaining an image absorption value, describing the increase in absorption due to a contrast agent in the hollow organ compared to surroundings of the hollow organ, along the center line of each hollow organ; ascertaining, for each image absorption value, a theoretical computing absorption value expected when the hollow organ is completely filled with the contrast agent, by using at least the diameter and contrast agent information; determining a filling level along the center line of each hollow organ of the hollow organ structure by comparing the image absorption value with the computing absorption value; and outputting filling level information including the filling levels.

Abstract: A method for operating an X-ray imaging system includes outputting first X-ray beams onto an X-ray detector by an X-ray source for acquisition of a first X-ray capture of an object under examination. The object under examination is arranged between the X-ray source and the X-ray detector and is passed through by the first X-ray beams. The X-ray detector acquires an entry dose of the first X-ray beams after passage through the object under examination. A parameter value of at least one parameter for output of second X-ray beams by the X-ray source for acquisition of a second X-ray capture of the object under examination is ascertained by a control system. The parameter value is ascertained by the control system according to a specified ascertainment method as a function of a foreground substance of a foreground object, a background substance of a background object, and the entry dose.

Abstract: A method for operating an X-ray imaging system includes outputting first X-ray beams onto an X-ray detector by an X-ray source for acquisition of a first X-ray capture of an object under examination. The object under examination is arranged between the X-ray source and the X-ray detector and is passed through by the first X-ray beams. The X-ray detector acquires an entry dose of the first X-ray beams after passage through the object under examination. A parameter value of at least one parameter for output of second X-ray beams by the X-ray source for acquisition of a second X-ray capture of the object under examination is ascertained by a control system. The parameter value is ascertained by the control system according to a specified ascertainment method as a function of a foreground substance of a foreground object, a background substance of a background object, and the entry dose.

Abstract: Detector data is obtained from a flat panel X-ray detector, and an input image representing an object to be mapped is generated based on the detector data. By applying a noise suppression algorithm to the input image, a signal image is generated. The signal image or an image dependent on the signal image is scaled using an interpolation method so that in a first image direction, a number of pixels of the scaled signal image is greater than a corresponding number of pixels of the input image. By forming a difference between the input image and the signal image, a noise image is generated. The noise image is modified by expanding a spatial frequency spectrum of the noise image so that a maximum spatial noise frequency corresponding to the first image direction is increased. A result image is generated by adding the scaled signal image and the modified noise image.

Abstract: A method is for the automatic regulation of radiation doses of a person for an examination with a medical X-ray device, which has a first dose regulation. In an embodiment, the method includes a specification of X-ray parameters of an X-ray examination based upon patient information and a specification of a dose regulation as a function of X-ray parameters as well as a limit value for deterministic radiation damage and/or a guide value for stochastic effective doses.

Abstract: In order to achieve effective cooling, an X-ray emitter with a tube housing having a vacuum is provided. At least one anode is arranged in the tube housing, such that the anode is irradiated by an electron beam generated in a cathode and accelerated through an electrical field. The anode is excited, such that an X-ray deceleration radiation is emitted. The X-ray emitter has a thermoelectric converter (e.g., at least one thermophotovoltaic cell) for generating electrical energy. The thermoelectric converter is arranged, such that the thermoelectric converter may be irradiated at least in part by a heat radiation emanating from the anode.

Abstract: A computer-implemented method for evaluating an X-ray image includes: segmenting the hollow organ structure in the X-ray image; determining center lines and edge boundaries of the segmented hollow organ structure and ascertaining a diameter of each hollow organ along its center line; ascertaining an image absorption value, describing the increase in absorption due to a contrast agent in the hollow organ compared to surroundings of the hollow organ, along the center line of each hollow organ; ascertaining, for each image absorption value, a theoretical computing absorption value expected when the hollow organ is completely filled with the contrast agent, by using at least the diameter and contrast agent information; determining a filling level along the center line of each hollow organ of the hollow organ structure by comparing the image absorption value with the computing absorption value; and outputting filling level information including the filling levels.