Koninklijke Philips Corporation N.V.

Nxp B.v.

Trixell

Koninlijke Philips Electronics N.v.

Rainer Kiewitt

Mareike K Klee

Christoph Herrmann

Hans-Wolfgang Brand

Uwe Mackens

Olaf Wunnicke

Robert Frederick Milsom

Walter Ruetten

Matthias Simon

Wilhelm Georg Hermann

Olaf Wischhusen

Hans Peter L&ouml;bl

Martinus Hermanus Wilhemus Maria Van Delden

Matthias Wendt

Achim Hilgers

Joerg Bredno

Marc Andre De Samber

Klaus Reimann

Ulrich Schiebel

Michael Overdick

Rainer Pietig

Christoph Loef

Joerg Meyer

Kai Eck

Thomas Dürbaum

Klaus Juergen Engel

Norbert Conrads

Christian Baeumer

Guenter Zeitler

Carolina Ribbing

Helko Lehmann

Tiemen Poorter

Ruediger Mauczok

Bernd Menser

Marion Kornelia Matters-Kammerer

Georg Rose

Oliver Muelhens

Heiko Pelzer

Olivier Ecabert

Hans-Peter L&ouml;bl

Astrid Lewalter

Martin Fleuster

Christoph Hermann

Martin Kimutai Duerr

Hans Peter Sprong

Hans P Lobl

Pieter Willem Jedeloo

Jeffrey Zhang

Wilfried Germer

Mike Ju

Steffen Gunther Hohmann

Robert J A Derksen

Paul H P Van Oppen

Mik Ju

Antonius J M Nellisen

Antal F J Baggerman

Christopher Taylor

The present invention relates to determining changes in the X-ray emission yield of an X-ray tube, in particular determining dose degradation. In order to provide determination of such changes, an X-ray source is provided comprising a cathode, an anode; and at least one X-ray sensor (). The cathode emits electrons towards the anode and the anode comprises a target area on which the electrons impinge, generating X-ray radiation. An X-ray barrier () is provided with an aperture () for forming an emitting X-ray beam from the X-ray radiation, wherein the emitting X-ray beam has a beam formation () with a central axis. The at least one X-ray sensor is arranged within the beam formation and measures the X-ray intensity for a specific direction of X-ray emission with an angle with respect to the central axis. The at least one X-ray sensor can be positioned inside the beam formation (), but outside the 'actual field of view' () as determined by a diaphragm ().

Determining changes in the x-ray emission yield of an x-ray source

According to an embodiment of the invention, signals coming from a number of pixels or sub-pixels are compared and those signals from pixels or sub-pixels, which are substantially brighter than the other pixels in the comparison, are excluded from contributing to the output signal, to suppress direct detection events in X-ray detectors. For this an X-ray detector apparatus () can comprise: &#x2014;an array () of pixel arrangements (), &#x2014;each pixel arrangement () comprising at least one radiation collection device () for converting incident radiation into a collection device signal, &#x2014;switching arrangements () for providing to respectively one output element () a signal derived from the collection device signals of a plurality of radiation collection devices () of at least one pixel arrangement ().

Suppression of direct detection events in X-ray detectors

The application describes an X-ray detector for use in a medical equipment, wherein the detector comprises an unit for transforming X-ray radiation into electrical charge, a first capacitor for being charged by an electrical charge, wherein the first capacitor is electrically connected to the unit for transforming, a second capacitor for being charged by an electrical charge, and a first gain switching gate, wherein the second capacitor is electrically connected with the unit for transforming if the first gain switching gate is in on-state, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further the application describes an X-ray system comprising a detector according to the invention, wherein the system is adapted for gain selection, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further, the application describes a method for using a detector according to the inventive concept, wherein the first gain switching gate is switched on only for short periods of time for redistribution of electrical charge between the first capacitor and the second capacitor.

X-ray detector

Scattered radiation has non-intuitive properties. A signalling system () is presented which provides a perceptible signal () being indicative of a predicted or measured spatial distribution of scattered radiation. An embodiment provides for easy assessment of the individual risk of scattered radiation exposure for personnel working in an environment exposed to scattered radiation. A method for predicting a distribution of scattered radiation takes into account at least one object related parameter () and at least one radiation related parameter () and, in response hereto, predicts a distribution of scattered radiation.

Simulation and visualization of scattered radiation

An apparatus includes an x-ray source () that generates transmission radiation that traverses an examination region () and a detector () that includes a photo-converter () that detects the radiation and generates a signal indicative thereof. The photo-converter () includes a light receiving region () on a back side ().The light receiving region receives light indicative of the detected radiation. The photo-converter () further includes read-out electronics () within a front side (), which is located opposite the back side (). The read-out electronics () process a photo-current indicative of the received light to generate the signal indicative of the detected radiation. The photo-converter () further includes a photodiode ()disposed between the light receiving region () and the read-out electronics (). The photodiode () produces the photo-current. A reconstructor () reconstructs the signal to generate image data indicative of the examination region ().

Radiation sensitive detector

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 invention relates to an electronic device provided with an electronic component which comprises an integrated circuit arrangement including a semiconducting substrate, active components, and passive components such as capacitors and resistors. The resistors comprise materials of a high resistivity and can be manufactured with resistance values which lie within a narrow tolerance range. The invention further relates to a transmitter, a receiver, an electronic component, a peripheral circuit, a current supply circuit, a filter module, and an integrated circuit arrangement.

Integrated circuit device including a resistor having a narrow-tolerance resistance value coupled to an active component

The integrated capacitor structure comprises a first branch with a first capacitor () and a second branch with a second capacitor (). The second capacitor () has a higher capacitance density and a lower breakdown voltage than the first capacitor (). The first branch has a shorter RC time constant than the second branch, such that a voltage peak will substantially follow the first branch. This first capacitor () has a sufficient capacity to store the charge of the voltage peak. In one embodiment, the second capacitor () is a stacked capacitor. The structure is suitable for ESD-protection and may, to this end, additionally comprise diodes () and resistors ().

ESD protected integrated capacitor with large capacity

Systems and methods for data acquisition in computed tomography (CT) applications are provided. The systems and methods are particularly adapted for scanning and acquiring/processing data in connection with high-power cone-beam CT applications. The electron beam is moved/scanned along the anode surface to multiple focal positions. Data acquisition for a full projection at one focus position and one view angle is achieved by activating each focus position multiple times during the data acquisition for one angle of the gantry. The detector array and associated data processing system are adapted to rapidly switch between the different focus positions during the acquisitions for one view angle and to collect all data belonging to the same projection into the same data set. Adaptive electron optics are utilized to move/scan the electron beam along the anode surface to the various focus positions. Alternatively, a plurality of cathodes may be provided for respective focus positions and the system may support fast switching therebetween to achieve desirably short spot times. The disclosed CT system permits greater power densities without risk of heat damage to the anode and effectively increases the track velocity of the electron beam on the anode surface. The CT system and associated data acquisition methods have particular utility in CT applications requiring increased time resolution and/or spatial resolution, e.g., cardiac CT applications.

Systems and methods for scanning and data acquisition in computed tomography (CT) applications

Crystalline, single-phased layers of PbMgNb0with relative dielectric constants of 1500 and more are prepared through the use of a precursor solution that comprises a macrocyclic complexing agent. This agent is added to the lead component in an organic solution. The resulting layer is part of a device which may further include semiconductor elements and resistors.

Precursor solution, method of preparation thereof and use thereof

The invention relates to a high frequency component with a substrate constructed of a plurality of dielectric layers and, between them, electrode layers having conducting track structures, in which substrate at least one capacitive element and at least one inductive element is formed, whereby at least one arrangement of opposed conducting trackstructures is provided, these realizing simultaneously a capacitive and an inductive element, whereby the common-mode impedance and the push-pull impedance between the opposing conducting track structures are adjusted to differ by a factor of at least 2.

High frequency component

An MR apparatus has a resonant circuit, which is formed by an MR receiving coil (L) and a capacitor (C), and has an electronic control circuit (S) for switching the resonant circuit between two or more operating modes. The invention proposes that the electronic control circuit (S) be connected with a receiving device (L) for wireless reception of a high-frequency electromagnetic control signal.

Circuit arrangement for detuning a resonant circuit of an MR apparatus

The invention relates to an electronic device provided with an electronic component which comprises an integrated circuit arrangement which has a semiconducting substrate, active components, and passive components such as capacitors with high and with low capacitance values and/or resistors. The invention further relates to a transmitter, a receiver, an electronic component, a peripheral circuit, a power supply circuit, a filter module, and an integrated circuit arrangement.

Integrated circuit including a capacitor with a high capacitance density

A mobile telephone device fitted with a transmitter and a receiver each having a high-frequency component with an integrated decoupling capacitor. The high-frequency component includes a substrate with the decoupling capacitor on one surface thereof, first and second current supply terminals for the capacitor on the same surface of the substrate as the capacitor, one capacitor electrode connected to a high frequency circuit and a DC voltage source, also on the one surface of the substrate, and the other capacitor electrode connected to ground.

Mobile telephone device with passive integrated module

The invention describes a tunable filter arrangement with at least two resonators which are coupled to one another and of which at least one is connected to a capacitor with tunable capacitance. The electrical properties of the resonator, and thus the overall filter characteristic, can be changed through a change in the capacitance of the capacitor. Furthermore, a transmitter, a receiver, a mobile telephone device, and a wireless data transmission system comprising such a filter arrangement are disclosed, as is a tunable bulk acoustic wave resonator.

Tunable piezoelectric filter arrangement using a dielectric material with a voltage-dependent dielectric constant

Growing community of inventors

Roetgen, Germany

Rainer Kiewitt