Koninklijke Philips Corporation N.v.

Erik Hummel

Peter George Van De Haar

Fred Simon Berend Van Nijnatten

Petrus Johannes Withagen

Joost Adrianus Van Rooijen

Drazenko Babic

Robert Johannes Frederik Homan

Angelique Balguid

An X-ray system comprises an assembly that is moveable to different scan coordinates to acquire X-ray projection images at the different scan coordinates in a dynamic mode while the assembly is moving. The assembly is also moveable to a predetermined reference coordinate to acquire an X-ray projection image at the predetermined reference coordinate in a static mode while the assembly is resting. The X-ray system also comprises a processor configured to obtain dynamic gain calibration parameters from the X-ray projection images acquired in the dynamic mode at one of the different scan coordinates; obtain a static gain calibration parameter from the X-ray projection image acquired in the static mode at the predetermined reference coordinate; and determine adjusted dynamic gain calibration parameters.

Static gain calibration

The present invention relates to a device for controlling a position of an anti-scatter grid in an X-ray image acquisition system, the device () comprising: a measurement unit (); a control unit (); and a shifting unit (); wherein the measurement unit () is configured to determine an X-ray beam focus position () of an X-ray radiation source of the X-ray image acquisition system with respect to an X-ray detector of the X-ray image acquisition system; wherein the control unit () is configured to generate a shifting signal based on a displacement () between the X-ray beam focus position () and a grid focus position () of the anti-scatter grid; and wherein, based on the shifting signal, the shifting unit () is configured to shift an anti-scatter grid of the X-ray image acquisition system in at least one direction to align the anti-scatter grid with the X-ray beam focus position (), provides an improved anti-scatter grid for X-ray acquisition systems. The invention provides the use of an improved anti-scatter grid () for X-ray acquisition systems ().

Device, system and method for controlling a position of an anti-scatter grid in an X-ray image acquisition system

Imaging system () for enabling instrument guidance in an interventional procedure, comprising: &#x2014;an input () for obtaining an interventional path () for use in the interventional procedure, the interventional path being planned based on 3D image data () of a patient's interior, and the interventional path being indicative of an entry point () on the patient's exterior; &#x2014;a camera (-) for obtaining a camera image () of the patient's exterior during the interventional procedure; &#x2014;a processor () for i) establishing a spatial correspondence between the camera image and the 3D image data, ii) based on the spatial correspondence, calculating a view () of the interventional path that corresponds with the camera image, and iii) combining the view of the interventional path with the camera image to obtain a composite image (); and &#x2014;a display output () for displaying the composite image on a display ().

Imaging system and method for enabling instrument guidance

For acquiring an image of a moving region of interest of an object, a corresponding X-ray image acquisition apparatus may include a semitransparent X-ray transmitting device comprised in a collimator which is positioned within a beam of irradiating X-rays thereby at least partly shielding regions on a surface of a detector. After acquiring an X-ray image by detecting X-rays transmitted through the object, the position of the device is automatically adjusted based on image information included in the at least partly shielded region on the detector surface. Taking into account X-ray absorption properties of the device, a virtual image may be calculated, the virtual image corresponding to an X-ray image as if there was no X-ray absorption within the collimator. From this virtual image, the region of interest may be derived, and wedges of said device may be positioned to continuously follow the region of interest.

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Eindhoven, Netherlands

Erik Hummel