A medical image diagnosis apparatus according to an embodiment of the present disclosure includes: a gantry, one or more columns, a processing circuitry, and, and a supporting and moving mechanism. The gantry includes an imaging system related to imaging a patient. The one or more columns are each configured to support the gantry so as to be movable in a vertical direction. The processing circuitry generates an image on the basis of an output from the imaging system. The supporting and moving mechanism is configured to support the patient from underneath, while being installed so as to be movable in a direction intersecting the moving direction of the gantry. The processing circuitry controls the moving of the supporting and moving mechanism.

The present invention provides a mobile imaging system for imaging of patients in medical interventions comprising a ring gantry with a plurality of independently rotating rings whereas a first rotating ring positions an X-ray source with collimator and a second rotating ring positions an image detector such that the region of interest (patient) can be positioned off-centered with respect to the ring center. The system supports planar X-ray imaging and Computed Tomography (CT) and Cone beam CT (CBCT) acquisitions of three dimensional (3D) volumes with variable X-ray field of views (FOVs) adapted to regions of interest (ROIs), which are not required to be of cylindrical shape. The mobile system can be equipped with stereoscopic cameras integrated in the gantry an on moving rings to support optical tracking and navigation of instruments within the same co-ordinate system of X-ray information. The gantry can be equipped with additional sensors and robotic manipulators on further rings operating in said co-ordinate system on mobile platform. The gantry provides a generic mechanical and electrical interface to a supporting structure, which can be attached to a variety of mobility platforms to support robotic positioning of the system in various orientations of scanner in treatment rooms to accommodate a wide range of patient setups, including the possibility for inclined and vertical scans of patients in upright position.

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).

A radiation detector according to an embodiment includes a plurality of radiation detector modules and a fixing frame. When a radiation detector module is attached to the fixing frame, a guiding part with a groove shape formed at an end of a support member of the radiation detector module on a side of the fixing frame is fitted to a guiding pin provided to an end of the fixing frame, so that the radiation detector module is positioned in a radiation irradiation direction while a movement thereof in a channel direction and a row direction is restricted.

A system and method for metal artifact avoidance in 3D x-ray imaging is provided. The method includes determining a 3D location of metal in an object or volume of interest to be scanned; estimating a source-detector orbit that will reduce the severity of metal artifacts; moving an imaging system to locations consistent with the source-detector orbit that was estimated; and scanning the object according to the source-detector orbit.

Various methods and systems are provided for an integrated filter assembly including a plurality of bowtie filters and a hardening filter mounted on a single carriage. In one embodiment, an imaging system may include a carriage including a hardening filter and one or more bowtie filters, and a filter driving system for moving the carriage to selectively position the hardening filter and one of the one or more bowtie filters in a path of a radiation beam between a radiation source and an imaging subject, the hardening filter at least partially overlapping with at least one of the one or more bowtie filters. In this way, a single carriage may include a plurality of filters which may be selectively positioned in a path of the radiation beam entering a subject without having to stack multiple carriages and switch carriages between scans.

Methods and systems are provided for an imaging system including a gantry with a rotatable section including an integrated power source. The integrated power source is configured to provide power to an x-ray tube and other components coupled to the rotatable section and is configured to rotate with the rotatable section. The integrated power source is configured to provide a counter-weight to other components coupled to the rotatable section to increase a rotational balance of the gantry.

A medical image apparatus according to an embodiment of the present disclosure includes a main body that is travelable, a column vertically coupled to the main body, a straight arm moving unit sliding in a longitudinal direction of the column, a straight arm coupled to the straight arm moving unit and rotating with respect to the column, and a source arm located on a side of the straight arm, perpendicular to the straight arm, and including a source driving rail through which a source assembly slides, wherein the straight arm is coupled to a moving unit rotating shaft formed on the straight arm moving unit, and is rotatable with respect to the column about the moving unit rotating shaft, and the source arm is fixed to the side of the straight arm.

The invention relates, in particular, to structures of an arrangement applicable for use in the context of dental or medical X-ray imaging, wherein the arrangement comprises an X-ray detector (15), an X-ray source (14), a light field indicator (141) and a support construction (12) to which the X-ray source (14) construction and the light field indicator (141) construction are mounted. The support construction (12) is configured to enable positioning the X-ray source (14) construction and the light field indicator (141) construction at essentially the same location, so as to when at a given time locating at said essentially same location, to direct a given X-ray irradiation field pattern and visible light field pattern in essentially the same direction towards the X-ray detector (15).

A method and a system for providing calibration for a polychromatic photon counting detector forward counting model. Measurements with multiple materials and known path lengths are used to calibrate the photon counting detector counting response of the forward model. The flux independent weighted bin response function is estimated using the expectation maximization method, and then used to estimate the pileup correction terms at plural tube voltage settings for each detector pixel. The beam hardening corrections are then applied to the measured projection data sinogram, and the corrected sinogram is reconstructed to the counting image at the selected single energy.