A cooling system used in an X-ray generator having a cathode and anode that includes a target having a focal spot, wherein heat is generated in the anode and focal spot during operation of the X-ray generator. The system includes a heat transfer element attached to the anode wherein the heat transfer element includes a plurality of fin elements that transfer heat from the anode to surrounding air to cool the anode. The system also includes a liquid channel formed in the anode, wherein the liquid channel includes a cooling liquid. The liquid channel is located adjacent the target wherein heat from the focal spot is transferred to the cooling liquid to cool the focal spot wherein the heat transfer element, liquid channel and anode are unistructurally formed. Further, the cooling system includes a circulation pump that moves the cooling liquid in the liquid channel.

An X-ray apparatus includes an X-ray source embodied to generate X-rays; an X-ray detector; and an X-ray reflector. The X-ray reflector is embodied to reflect X-rays generated by the X-ray source such that the reflected X-rays hit the X-ray detector. The X-ray detector is in particular embodied to detect the X-rays. The X-ray apparatus can, on the one hand, enlarge the available space above a patient. Furthermore, focusing via the X-ray reflector enables the power of the X-ray source to be increased while retaining a constant spatial resolution or the spatial resolution to be improved while retaining a constant power of the X-ray source.

Systems and methods for medical imaging. The method may include acquiring a tube voltage switching waveform for a radiation source of a medical device. The method may include determining a tube current switching period based on the tube voltage switching waveform. The method may include determining a sampling period correlated with the tube current switching period. The method may include acquiring projection data according to the sampling period. The method may further include reconstructing an image based on the acquired projection data.

A mobile X-ray imaging apparatus is an apparatus that enables the performance of a fluoroscopic procedure in any setting. The apparatus may include an elongated frame, a wheeled base, a U-shaped support, a height-adjusting track, a support carriage, an X-ray generator, and an image-capturing device. The elongated frame supports the U-shaped support and maintains the U-shaped support at a desired height. The wheeled base maintains the elongated frame upright and facilitates the relocation of the apparatus. The U-shaped support maintains the X-ray generator and the image-capturing device at the desired arrangement to perform the fluoroscopic procedure. The height-adjusting track enables the repositioning of the U-shaped support along the elongated frame to accommodate the patient. The support carriage connects the U-shaped support to the height-adjusting track and keeps the U-shaped support in place during the procedure. The X-ray generator and the image-capturing device enable the fluoroscopic procedure to be performed.

A method, in an embodiment, is for setting an X-ray intensity using a structured anode or a field emitter cathode or a finger-shaped cathode head. Other embodiments include an associated X-ray device, an associated single X-ray tube CT scanner, an associated dual X-ray tube CT scanner, and an associated computer program product.

Various methods and systems are provided for x-ray imaging. In one embodiment, a method comprises acquiring, with an x-ray detector tilted at an angle with respect to an x-ray source, an x-ray image, calculating the angle from the x-ray image, generating a corrected x-ray image based on the calculated angle, and displaying the corrected x-ray image. In this way, tilt artifacts caused by the x-ray detector being tilted with respect to the x-ray source may be removed from an x-ray image.

The invention relates to off-center detector X-ray tomography reconstruction of an image of an object on the basis of projection data acquired during a rotation of an X-ray source and the off-center detector around the object in two rotational passes of less than 360°, wherein a focus point of the X-ray beam travels along largely overlapping arcs (401, 402) in the two rotational passes, the off-center detector being positioned asymmetrically with respect to a central of the X-ray beam and a direction of a detector offset being reversed between the passes. According to the invention, redundancy weighting of the projection data with respect to a redundant acquisition of projection values during each of the rotational passes is made using a redundancy weighting function determined on the basis of a union of the arcs (401, 402).

An apparatus and a method for correcting for signal variations in pixels of a main photoelectric conversion element in a radiation detection apparatus due to focal spot position drifts. Edge reference detectors are positioned next to a main detector, in a fan beam coverage but outside a scan field of view. The signal variations of the edge reference detectors under an anti-scatter-grid shadow are used to estimate a real-time focal spot movement, which is used to estimate a shadow/signal variation on the main detector that are in the scan field of view.

A method for obtaining a Computer Tomography (CT) image of an object reduces heel effect artefacts and includes generating x-rays using an x-ray source comprising an angled anode, recording at least one set of 2D projections of the object or a part thereof, and generating at least one 3D CT image of the object. Each 3D CT image is corrected, wherein scaling factors for slices of voxels are determined with at least one 3D CT calibration image that pictures similar or identical object structures of a calibration object placed within the x-ray beam path with respect to a y-direction. A contribution to grey values of voxels belonging to said object structures attributable to the slice position in the y direction is determined at least approximately, and the scaling factor for a respective slice of voxels is chosen such that it compensates for the determined grey value contribution for that slice.

An X-ray imaging apparatus includes an X-ray source, an X-ray imaging panel, and a controller. The controller includes an image processing unit that generates an inspection image in accordance with a data signal read from a thin-film transistor with the thin-film transistor supplied with a gate signal, a detection control unit that detects a dark-spot pixel from the inspection image, and a threshold correction unit that applies, to a gate of the thin-film transistor corresponding to the dark-spot pixel, a positive shift voltage that raises a gate-off threshold voltage of the thin-film transistor.