Abstract: There is provided a computer implemented method of providing a client terminal with instructions for treatment of at least a portion of an organ of a patient, the method comprising: receiving electrical readings obtained by electrodes located within the portion of the organ, identifying by at least one classifier instructions for treatment of a region in the portion of the organ identified as an intervention target region, wherein the classifier identifies the instructions for treatment of the region based on electrical readings or a transformation thereof previously associated with treatment of intervention target regions in the portion of the organ of other patients, and marking on an image of the portion of the organ presented on a display, the instruction for treatment of the region identified by the classifier as an intervention target region.

Abstract: An apparatus for heating a load with microwave energy is provided. The microwave energy is applied by the apparatus at frequencies wherein the load's dielectric constant is within a predetermined range. The apparatus may include a microwave power source configured to supply microwave energy at the applied frequencies; and a radiating plate. The radiating plate may include an electrically conductive structure that includes a plurality of radiating elements; and a feeding port, connecting the electrically conductive structure to the microwave power source. The radiating plate is configured so that most of the power fed from the microwave source through the feeding port returns towards the power source when no load is contacting the radiating plate, and most of the power fed from the microwave source through the feeding port is absorbed by the load to be heated by the apparatus when the load is contacting the radiating plate, even in absence of a microwave cavity that encloses the radiating plate and the load.

Abstract: Methods and systems for placement of and/or placement planning for body surface electrodes are described. In some embodiments, body surface electrodes are used to generate intra-body electromagnetic fields sensed by intra-body probes for applications such as electrical field-guided catheter navigation and/or dielectric property-based tissue lesion assessment. Sizes and/or positions of body surface electrodes are optionally selected based on the results of electromagnetic simulations. Criteria for selection include, for example, potential gradient uniformity and/or intensity. In some embodiments, body surface electrode placement is performed under automated optical guidance. For example, images are obtained and used to indicate and/or assess body surface electrode placement. Optionally, indication is with respect to fiducial marks placed on the body, to which an electromagnetic simulation is spatially registered.

Abstract: Methods and systems for position determination of an intrabody probe, targets of an intrabody probe, and or actions to be performed using an intrabody probe are described. In some embodiments, an anatomy being navigated and/or mapped is described by a rule-based schema relating different anatomically identified structures to one another according to their ability to help identify and/or locate one another. Additionally, in some embodiments, data recorded from the intrabody probe is processed according to schema rules in order to provide anatomical identification of the anatomical region which the intrabody probe is sampling, optionally without performing detailed mapping, and/or prior to the availability of detailed mapping of anatomical geometry.

Abstract: A method includes processing an object in a cavity by applying radio frequency (RF) energy to the cavity. A first plurality of frequencies is identified, characterized in that a time derivative of a value indicative of a dielectric response of the cavity to RF energy at frequency of the first plurality of frequencies is larger than a first threshold. More energy is applied at frequencies of the first plurality of frequencies than at other frequencies.

Abstract: A method of estimating a spatial relationship between at least a part of a patient esophagus and a heart chamber, including :measuring at least one electric parameter at one or more positions within the heart chamber to obtain measured values; and estimating the spatial relationship based on the measured values.

Abstract: There is provided a method for monitoring and control of heating food portions in heaters, each installed in communication with a respective client computer in communication with a same server, the method performed by the server comprising: receiving from the client computers, RF signatures, each RF signature being based on measured reflections of RF signals transmitted within a cavity of one of the heaters containing therein a food portion, analyzing the RF signatures, determining for each heater based on the analysis of the RF signatures, at least one heating instruction to operate each heater to heat the food portion therein; and transmitting to each of the client computers, the respective at least one determined heating instruction comprising instructions to generate RF signals and transmit the RF signals to the food portions using heating antennas of the heater.

Abstract: Methods for estimating of the effectiveness of catheter ablation procedures to form lesions. Lesion effectiveness parameters are received, and effectiveness of a corresponding ablation (optionally planned, current, and/or already performed) is estimated. The estimating is based on use by computer circuitry of an estimator constructed based on observed associations between previously analyzed lesion effectiveness parameters, and observed lesion effectiveness. The estimator is used by application to the received lesion effectiveness parameters.

Abstract: Method of processing an object in a cavity by application of radio frequency (RF) energy via a plurality of radiating elements. The method comprising applying a first amount of RF energy to the cavity at a first plurality of excitation setups, wherein applying energy at each excitation setup of the first plurality of excitation setups comprises applying RF energy via a plurality of radiating elements at a common frequency and during overlapping time periods. For each radiating element, one measures during the application of each of the plurality of excitation setups, electromagnetic feedback. The method further includes applying a second amount of RF energy to the energy application zone at one or more excitation setups, at least one of which is not included in the first plurality of excitation setups and selected based on the electromagnetic feedback.

Abstract: Methods for estimating of the effectiveness of catheter ablation procedures to form lesions, and particular lesions which together form an ablation segment of an ablation line. Lesion effectiveness parameters are received, and effectiveness, optionally the joint effectiveness, of corresponding ablations (optionally planned, current, and/or already performed) is estimated. In some embodiments, estimating is based on use by computer circuitry of an estimator constructed based on observed associations between previously analyzed lesion effectiveness parameters, and observed lesion effectiveness. Additionally or alternatively, estimators may be constructed based on analytic functions. The estimator is used by application to the received lesion effectiveness parameters.

Abstract: Methods and systems for position determination are described for using an intrabody probe having a plurality of electrodes to generate a plurality of different electrical fields, and to also measure, using the plurality of electrodes, a measurement set (a Ve-e measurement set) comprising a plurality of measurements of the plurality of different electrical fields while the probe remains in one position. From the Ve-e measurement set, spatial position coordinates for the intrabody probe are estimated within an intrabody coordinate system, using an established mapping between previously observed Ve-e measurement sets and positions in the intrabody coordinate system. Systems and methods for generating and selecting such mappings are also described.

Abstract: In some embodiments, a body cavity shape of a subject is reconstructed based on intrabody measurements of at least one property of an electromagnetic field by an intrabody probe (for example, a catheter probe) moving within a plurality of electrical fields intersecting the body cavity. In some embodiments, the electrical fields are generated at least in part from electrodes positioned in close proximity, for example, within 1 cm, of the body cavity. In some embodiments, the body cavity is a chamber of a heart (for example, a left atrium or left ventricle), and the electrodes used to generate the electrical field are positioned in the coronary sinus, a large vein occupying the groove between the left atrium and left ventricle. In some embodiments, known distances between measuring electrodes are used in guiding reconstruction, potentially overcoming difficulties of reconstruction from measurements of non-linear electrical fields.

Abstract: An object is processed in a cavity resonator by application of radiofrequency energy to the cavity resonator through a plurality of feeds. Excitation setups are grouped into a plurality of peaks based on values of an absorbability indicator associated with each of the excitation setups. At least one peak among the plurality of peaks is selected based on the values of the absorbability indicator associated with the excitation setups grouped into each peak. Radiofrequency energy is applied to the cavity resonator based on the selection, in which the excitation setups are multi-dimensional.

Abstract: A method of processing an object in an energy application zone by application of radio frequency (RF) energy via a plurality of radiating elements may include applying RF energy to the energy application zone at a first plurality of excitation setups (excitation setups). The method may also include applying RF energy to the energy application zone at one or more excitation setups, at least one of which is not included in the first plurality of excitation setups, based on feedback received from the energy application zone in response to the application of the first amount of energy to the energy application zone at the first plurality of excitation setups.

Abstract: Registration of catheter-sensed intrabody voltage field measurements obtained along one or more tracks of catheter advance of withdrawal is made, in some embodiments, to reference voltage field measurements lying along predetermined tracks. Tracks optionally comprise the course of a blood vessel such as the superior or inferior vena cava, a path defined and/or limited by encounters with a wall of a heart chamber and/or apertures thereof, and/or another track of catheter motion. In some embodiments, transform parameters are propagated to regions away from the track, potentially allowing more rapid acquisition of targets.

Abstract: Systems and methods are described for planning of catheter ablation procedures, and in particular for planning of the placement of lesions and/or parameters used in ablation. In some embodiments, planning is based on thermal and/or dielectric simulation of lesions, individualized to the anatomy of the particular patient. Optionally, a plan comprises planning of a path along which an ablation lesion is to be formed, the ablation lesion optionally comprising one or more sub-lesions. The plan is optionally optimized for one or more criteria including, for example: minimization of path length, minimization of sub-lesion number, simplification of catheter maneuvering, avoidance of collateral damage to non-target tissue, access to the target dependent on anatomy shape and/or catheter mechanics, and/or features of the target anatomy such as tissue wall thickness and/or fiber direction.

Abstract: Methods and systems for placement of and/or placement planning for body surface electrodes are described. In some embodiments, body surface electrodes are used to generate intra-body electromagnetic fields sensed by intra-body probes for applications such as electrical field-guided catheter navigation and/or dielectric property-based tissue lesion assessment. Sizes and/or positions of body surface electrodes are optionally selected based on the results of electromagnetic simulations. Criteria for selection include, for example, potential gradient uniformity and/or intensity. In some embodiments, body surface electrode placement is performed under automated optical guidance. For example, images are obtained and used to indicate and/or assess body surface electrode placement. Optionally, indication is with respect to fiducial marks placed on the body, to which an electromagnetic simulation is spatially registered.

Abstract: An apparatus for heating a load with microwave energy is provided. The microwave energy is applied by the apparatus at frequencies wherein the load's dielectric constant is within a predetermined range. The apparatus may include a microwave power source configured to supply microwave energy at the applied frequencies; and a radiating plate. The radiating plate may include an electrically conductive structure that includes a plurality of radiating elements; and a feeding port, connecting the electrically conductive structure to the microwave power source. The radiating plate is configured so that most of the power fed from the microwave source through the feeding port returns towards the power source when no load is contacting the radiating plate, and most of the power fed from the microwave source through the feeding port is absorbed by the load to be heated by the apparatus when the load is contacting the radiating plate, even in absence of a microwave cavity that encloses the radiating plate and the load.

Abstract: A method includes processing an object in a cavity by applying radio frequency (RF) energy to the cavity. A first plurality of frequencies is identified, characterized in that a time derivative of a value indicative of a dielectric response of the cavity to RF energy at frequency of the first plurality of frequencies is larger than a first threshold. More energy is applied at frequencies of the first plurality of frequencies than at other frequencies.

Abstract: An apparatus for applying RF energy to process an object may include at least one controller configured to receive EM feedback-related values from an energy application zone, each of the values being associated with a respective MSE. The controller may also be configured to identify a change in one or more of the EM feedback-related values within a period of time; adjust the RF energy application based on the change in the EM feedback-related values identified, and cause application of RF energy to the energy application zone.