Koninklijke Philips Corporation N.V.

Bernd Menser

Christoph Herrmann

Hanns-Ingo Maack

Dirk Schaefer

Lester Donald Miller

Jens Wiegert

Klaus Juergen Engel

Matthias Simon

Johannes Wilhelmus Maria Jacobs

Peter Prinsen

Detlef Mentrup

Nishant Singh

Thomas Koehler

Michael Grass

Gereon Vogtmeier

Daniel Bystrov

Julien Senegas

Martin Bergtholdt

Thomas Netsch

Walter Ruetten

Heidrun Steinhauser

Rainer Kiewitt

Alberto Fazzi

Herman Stegehuis

Andriy Yaroshenko

Walter Rütten

Fred Simon Berend Van Nijnatten

Klaus Jürgen Engel

Sven Kroenke

Sascha Andreas Jockel

An X-ray imaging system () includes an X-ray source (), an X-ray detector (), a depth camera (), and a processor (). The processor () receives depth camera image data from the depth camera, projects the depth camera image data onto a radiation-receiving surface of the X-ray detector (), from a perspective of the X-ray source (), and generates an image representation () of the projected depth camera image data on the radiation-receiving surface of the X-ray detector (), from a perspective of the depth camera ().

Positioning an object with respect to an X-ray detector

The present invention provides methods and devices for making an anti-scatter grid for a radiographic imaging device identifiable. A method for providing an anti-scatter grid () for a radiographic imaging device comprises forming, by an additive manufacturing process, a grid pattern () in accordance with a product specification of the anti-scatter grid () to be provided; and forming, by an additive manufacturing process, a number of structural modifications () in or at the grid pattern in a manner making the number of structural modifications () image-based recognizable when the anti-scatter grid () is viewed according to its intended use in a viewing direction from a radiation source of the radiographic imaging device, and in a unique identification pattern () creating a unique identifier to make the anti-scatter grid to be provided identifiable among one or more others.

Identifiable anti-scatter grid for a radiographic imaging device

The disclosure relates to an X-ray imaging system for acquiring two-dimensional or three-dimensional images of a subject. A relative position of an X-ray emitting region, as seen in a coordinate system which is stationary relative to an anti-scatter arrangement and/or an X-ray sensitive surface is controlled so that a first and a second image are acquired at different relative positions of the X-ray emitting region relative to the anti-scatter arrangement and/or the X-ray sensitive surface (). A data processing system of the imaging system generates an output image, based on each of the images. In the output image, artefacts generated by the anti-scatter arrangement, are reduced, suppressed or eliminated compared to the first and the second image.

X-ray imaging systems for reducing artefacts associated with anti-scatter grids and methods of operating the same

An image processing system (IPS) and related method. The system (IPS) comprises an input interface (IN) for receiving an image (IM) of an object (OB) acquired by an imaging apparatus (IA). A kernel provider (KP) of the system (IPS) is configured to provide respective scatter kernels for at least two scatter types. A scatter correction module (SCM) of the system (IPS) is configured to perform a correction in the image based on the provided at least two kernels.

Scatter correction for X-ray imaging

The present invention relates to processing X-ray images of an object. In order to improve the accuracy for interactive geometrical measurements, a device () for processing of an X-ray image of an object () is provided. The device comprises an input unit () and a processing unit (). The input unit is configured to provide a shape related information () from an object () to be irradiated. The input unit is also configured to provide a generic object model (), and to provide an actual X-ray image () of the object. The processing unit is configured to adapt the generic object model based on the shape related information in order to generate an individual object model (). The processing unit is also configured to determine, based on the individual object model, an individual image processing modificator () for processing at least one part of the X-ray image, and to apply the individual image processing modificator for further processing of the X-ray image.

Geometry measurements in x-ray image

Method for estimating radiation dose received by a tissue of interest during an imaging scan comprising: i, obtaining image data of a body region including the tissue of interest, ii. sub-dividing the image data into axial slices, comprising tissue axial slices and non-tissue axial slices, iii. determining a net amount of radiation dose emitted or received by each axial slice by combining scan parameters of each axial slice with pre-calculated amounts of radiation dose, iiii summing the net amounts of radiation dose of all the tissue axial slices to obtain a tissue dose.

Method for estimating the radiation dose received by an organ during a computed tomography scan

An image processing system and related method. The system comprises an input interface (IN) for receiving dark-field image data obtained from imaging of an object (OB) with an X-ray imaging apparatus (XI). A corrector module (CM) of the system (IPS) is configured to perform a correction operation to correct said dark-field image data for Compton scatter to obtain Compton-Scatter corrected image data. The so Compton scatter corrected image data is output by an output interface (OUT) of the system.

Scatter correction for dark field imaging

An interventional X-ray system is proposed, the system including a multi X-ray source unit positioned below a patient table. This 'multiblock' may comprise several x-ray sources with focal spot positions distributed along the x-y (table) plane. The x-ray sources are operable in a switching scheme in which certain x-ray sources may be activated in parallel and also sequential switching between such groups is intended. The switching may be carried out so that several images with different projection angles can be acquired in parallel. In other words, an optimal multi-beam X-ray exposure is suggested, wherein fast switching in one dimension and simultaneous exposure in the 2nd dimension is applied.

System and method for multi-beam X-ray exposure for 4D imaging

Calibration methods and related calibration controllers (CC) for calibrating imaging apparatuses () such as a 3D computed tomography imager or a 2D x-ray imager. The imaging apparatuses () are equipped with a dynamic beam shaper (RF). The dynamic beam shaper (RF) allows adapting the energy profile of a radiation beam (PR) used in the imaging apparatuses () to a shape of an object (PAT) to be imaged. A plurality of gain images are acquired in dependence on a shape of the object and the view along which the gain images are acquired or a target gain image is synthesized from a plurality of basis gain images (BGI).

Calibration of imagers with dynamic beam shapers

A method and system for processing a radiography image derived from an X-ray radiation passing through an object. The method includes acts of estimating, based on the radiography image, a scatter signal present in said radiography image; calculating, based on the estimated scatter signal, a scatter removal signal indicative of a scattered radiation removable from the X-ray radiation passing through the object by a reference anti-scatter device; and correcting the radiography image based on the scatter removal signal.

Method and radiography system for grid-like contrast enhancement

A detector unit () for detecting electromagnetic radiation (), the detector unit () comprising a conversion material () adapted for converting impinging electromagnetic radiation () into electric charge carriers, a charge collection electrode () adapted for collecting the converted electric charge carriers, a shielding electrode () adapted to form a capacitance with the charge collection electrode (), and an evaluation circuit (to) electrically coupled with the charge collection electrode () and adapted for evaluating the electromagnetic radiation () based on the collected electric charge carriers.

Detector for and a method of detecting electromagnetic radiation

The application describes an X-ray detector, which uses direct X-ray conversion (DiCo) combined with CMOS pixel circuits. DiCo materials have to be used with high voltage to achieve a high field strength. This makes the sensor prone to leakage currents, which falsify the measured charge result. Moreover, most direct conversion materials suffer from large residual signals that lead to temporal artifacts (ghost images) in an X-ray image sequence. A circuit is described, which senses the sensor's dark current including residual signals from previous exposures before the sensor is exposed (again) to X-ray, and freezes relevant circuit parameters at the end of the sensing phase in such way, that the dark current (leakage current and residual signal) can still be drained during exposure. Therefore, the charge pulses generated in the sensor due to X-ray exposure can be integrated without charges carried by the leakage current or residual signal, thus obtaining a more accurate estimate of the deposited X-ray energy.

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Hauset, Belgium

Bernd Menser