Biosense Webster (Israel) Ltd.

Biosense Webster, Inc.

Tamir Demri

Meir Bar-Tal

Daniel Osadchy

Avram Dan Montag

Gil Zigelman

Eliahu Zino

Ziyad Zeidan

Tal Haim Bar-on

Shaul Haim Raz

Tamir Avraham Yellin

Toam Shemesh

Michael Maydel

Dror Berman

Dan Sztejnberg

Menachem Schechter

Fares Safe

Ran Glazer

Pinhas Abramovich

Ofir Blatt

Tal Haim Bar-On

Ranit Eldar

A system includes multiple electrically-conductive channels and a processor. The processor is configured to receive, over the electrically-conductive channels, (i) respective first electric currents from a probe, which is within a body of a patient, via a plurality of first electrodes, which are attached to skin of the patient at a region of the body, and (ii) a second electric current from the probe via a second electrode, which is attached to the skin and is connected to one of the channels. The processor is further configured to ascertain respective first electric-current values of the first electric currents and a second electric-current value of the second electric current, and to calculate a position of the probe between the region and the second electrode, based on the first electric-current values and the second electric-current value. Other embodiments are also described.

Extending the tracking volume in a probe tracking system

A coordinate system registration module, including radiopaque elements arranged in a fixed predetermined pattern and configured, in response to the radiopaque elements generating a fluoroscopic image, to define a position of the module in a fluoroscopic coordinate system of reference. The module further includes one or more connections configured to fixedly connect the module to a magnetic field transmission pad at a predetermined location and orientation with respect to the pad, so as to characterize the position of the registration module in a magnetic coordinate system of reference defined by the magnetic field transmission pad.

Integration between 3D maps and fluoroscopic images

Registering coordinate systems on an image is carried out by positioning a calibration jig having at least two collinear marker quadruples that are opaque to an imaging modality. Collinear quadruples are detected on an image of the jig and respective image cross ratios of the collinear quadruples are computed. Candidate lines are established by associating at least one collinear marker quadruple and at least one collinear image quadruple that have matching cross ratios. Respective registrations of the calibration jig with the image are performed using pairs of the candidate lines. One of the registrations is selected, wherein the selected registration has a residual that is smaller than a predetermined value.

Identification and registration of multi-marker jig

A method for performing a medical procedure includes holding a non-linear dependence between the duration of a given phase within a cardiac cycle and a respective heartbeat rate. First and second image sequences of the dynamic activity of the heart of a patient, acquired at respective different first and second heartbeat rates of the heart, are received. Synchronization between the first and second image sequences is performed based on the non-linear dependence, on the first and second heartbeat rates, and on a given common heartbeat rate. The first and second image sequences are played in synchronization with the common heartbeat rate.

Synchronizing between image sequences of the heart acquired at different heartbeat rates

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Gilon, Israel

Tamir Demri