Koninklijke Philips Corporation N.v.

Biosense Webster (Israel) Ltd.

Karlsruher Institut Fur Technologie

Biosense Webster, Inc.

Städtisches Klinikum Karlsruhe Ggmbh

Olaf Dössel

Meir Bar-Tal

Ulrich Wolfgang Katscher

Hanno Heyke Homann

Ingmar Graesslin

Tobias Ratko Voigt

Yaniv Ben Zrihem

Axel Loewe

Gustavo Lenis

Markus Rottmann

Nicolas Pilia

Tobias Oesterlein

Daniel Frisch

Sebastian Alfred Seitz

Claus Schmitt

Armin Lurk

A catheter has a mapping assembly having a plurality of splines mounted at its distal portion. The splines each have a proximal end disposed at the distal portion of the catheter body and a distal end and configured as a Fibonacci spiral arm that diverges outwardly from the proximal end. The splines have a support arm with shape memory, a non-conductive covering in surrounding relation to the support arm, at least one location sensor mounted at or near the distal end, a plurality of electrodes mounted in surrounding relation to the non-conductive covering, and a plurality of electrode lead wires extending within the non-conductive covering. Each electrode lead wire is attached to a corresponding one of the electrodes.

Catheter with Fibonacci distributed electrodes

A computer system for determining Ventricular Far Field contribution in atrial electrograms of a patient. The system includes an interface module configured to receive a plurality of electrical signals generated by a plurality of sensors wherein the plurality of electrical signals relate to a plurality of locations in an atrium of the patient; a reference module configured to determine a reference signal reflecting electrical excitation of the patient's ventricles; and a data processing module. The data processing module is configured to select from the plurality of the received electrical signals such electrical signals which are recorded a number of conditions. The data processing module is further configured to determine a spatio-temporal distribution of the Ventricular Far Field inside the atrium by approximating the spatio-temporal distribution (VFFc) based on signal data of the selected signals by using an approximation model.

Method and system for determining ventricular far field contribution in atrial electrograms

A magnetic resonance imaging system () acquires magnetic resonance data () from a subject () that may include an electrically conductive object (e.g. an implant or a medical device). The magnetic resonance imaging system includes a radio-frequency transmitter () for generating a radio-frequency transmit field for acquiring the magnetic resonance data using a radio-frequency antenna (). The radio-frequency transmitter has multiple transmit channels. The radio-frequency antenna comprises multiple antenna elements () each adapted to connect to an antenna element. The amplitude and phase values of the RF transmit field of each of the transmit channels can be selected such that the magnetic field generated by the RF antenna is minimized at the location of the electrically conductive object, thereby reducing RF heating of the object.

Reducing the radio-frequency transmit field in a predetermined volume during magnetic resonance imaging

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Bruchsal, Germany

Olaf Dössel