A method for recording a scan from a series of 2D X-ray projections using a C-arm X-ray apparatus allows an analytical volume reconstruction of a disk-shaped region of interest. The C-arm X-ray apparatus has a coherent, flat focus trajectory comprising three sections on which the focus of the X-ray source is moved with recording of X-ray projection views. The X-ray source emits a cone beam in the direction of an imaging X-ray detector, such as in particular a flat panel detector FPD. In some implementations, the cone beam is configured as a fan beam with a fan angle in the plane of the focus trajectory, which contains the ROI with the virtual scan center in its center, wherein the central ray of the fan beam is located on the bisector of the fan angle, and stands vertically on the ray inlet window. Before the beginning of the scan, the C-arm is positioned in the orbital movement axis in a first extreme position in which the holder engages at one end of the C-arm with the X-ray source, and the adjustable holder of the C-arm is positioned in such a manner that the ROI is located outside of the circle segment formed by the C-arm and the central ray, and a first limiting beam of the fan beam, which starts from the focus point and which is located on the side of the central ray facing away from the C-arm, is tangential to the ROI. During the recording of the scan, the plane of the C-arm remains fixed in space.

The invention relates to a method and apparatus of control and/or determination of energy and/or velocity of a beam of a charged particles extracted from a synchrotron, the synchrotron using a radio frequency field to redirect the charged particles through an extraction material. The method and apparatus for extracting a group of charged particles at a known and controlled energy is optionally used in conjunction with any apparatus and/or technique coupled to a synchrotron, such as a charged particle cancer therapy system. For example, the knowledge/control of the charged particle beam delivery energy is used in conjunction with a multi-axes and/or a multi-field tumor irradiation system in combination with a tumor treatment plan to accurately ablate or irradiate a tumor.

This specification discloses methods and systems for generating a stereo image of an object that is positioned within an imaging volume. The object is positioned within the imaging volume. Two stationary X-ray source points are selected and activated. X-rays from both stationary X-ray source points are transmitted through the object being scanned and detected using detector elements positioned across the imaging volume and opposite the stationary X-ray source points. Image data sets from the X-rays detected by the detector elements are generated and then combined to produce the stereo image.

A method for recording a scan from a series of 2D X-ray projections using a C-arm X-ray apparatus allows an analytical volume reconstruction of a disk-shaped region of interest. The C-arm X-ray apparatus has a coherent, flat focus trajectory comprising three sections on which the focus of the X-ray source is moved with recording of X-ray projection views. The X-ray source emits a cone beam in the direction of an imaging X-ray detector, such as in particular a flat panel detector FPD. In some implementations, the cone beam is configured as a fan beam with a fan angle in the plane of the focus trajectory, which contains the ROI with the virtual scan center in its center, wherein the central ray of the fan beam is located on the bisector of the fan angle, and stands vertically on the ray inlet window. Before the beginning of the scan, the C-arm is positioned in the orbital movement axis in a first extreme position in which the holder engages at one end of the C-arm with the X-ray source, and the adjustable holder of the C-arm is positioned in such a manner that the ROI is located outside of the circle segment formed by the C-arm and the central ray, and a first limiting beam of the fan beam, which starts from the focus point and which is located on the side of the central ray facing away from the C-arm, is tangential to the ROI. During the recording of the scan, the plane of the C-arm remains fixed in space.

The present invention relates to a radiographic imaging apparatus and a corresponding radiographic imaging method. The proposed apparatus comprises an X-ray source and a photon counting X-ray detector. The X-ray source comprises a rotary X-ray anode having a number of radial slits and a target layer provided on a surface of said rotary X-ray anode in between said radial slits for emitting X-ray radiation when hit by said electron beam. The said photon counting X-ray detector comprises a persistent current sensing and correction unit for sensing a persistent output current in a blanking interval during which no X-ray radiation is emitted by said X-ray source and for using the sensed persistent output current to correct a detector signal in a subsequent measurement interval during which X-ray radiation is emitted by said X-ray source.

The present invention pertains to an apparatus and method for adaptive exposure in imaging systems. An x-ray source for producing x-ray radiation and an x-ray detector for measuring amount of x-ray radiation passing through the human patient and striking the detector can be used. A tomographic image of the human patient or a tomosynthetic image of the human patient can be generated. Region of interest filtering and equalization filtering can be utilized. Filtering can be accomplished with a mechanical shield or shutter or with electronic control of the x-ray source.

CT devices and methods thereof are disclosed. The CT device comprises a circular electron gun array including a plurality of electron guns, each of the electron guns is configured to emit electron beams along the radial direction of the circular electron gun array in sequence according to a predetermine pulse sequence; an acceleration cavity disposed inside of a circle on which the circular electron gun array is positioned, including a plurality of nested concentric coaxial cavities that operate in mode for accelerating electron beams emitted from the respective electron guns of the circular electron gun array; a circular transmission target disposed inside of a circle on which the acceleration cavity is positioned and being bombarded by the accelerated electron beams to generate X-rays; and a circular detector configured to receive the X-rays after they have passed through an object to be detected.

A system and method for producing an image of a subject with a tomographic imaging system are provided. A tomographic imaging system is operated to rotate a radiation detector, radiation source, or both through a plurality of angular positions around a subject while acquiring data. As the radiation detector or source is rotated, the radiation detector or source is shifted at each angular position by a different shift value. An image of the subject is reconstructed from the acquired data using a reconstruction technique that incorporates the shifts applied to the detector, source, or both into a system matrix.

A tomography apparatus includes a multi-focal point x-ray source, a support to travel a trajectory path, a detector having a plurality of pixels, where one of the multi-focal point x-ray source, the detector, and an item-under-test move on the support. A control processor controls a change in the focal point of the x-ray source at discrete points, or continuously, within a measurement region, the focal point change in a direction retrograde to the support arm travel, a detector memory accumulates a digital value representative of a signal charge from at least a portion of the plurality of pixels, the control processor reconstructs a volumetric image of the item-under-test by processing the detector memory contents. A method for continuous tomosynthesis and a computer-readable medium are also disclosed.

An X-ray imaging system includes an x-ray image acquisition unit, a display unit, an input unit, and adapting means. The x-ray image acquisition unit acquires a first image of a volume of interest of an object in a first projection direction and acquires a second image in a second projection direction. The display unit displays the first and the second image. The input unit determines the second projection direction by an input of a user. The user input includes a change in a viewing-direction of the user viewing the first image. The adapting means adapt a spatial relation between the projection direction of the image acquisition unit and the volume of interest of the object such that the projection direction correlates with the second viewing direction.