Abstract: The invention relates to a method for compensating a magnetic locator in the presence of a magnetic-field-disturbing material, comprising: an emitter (10) comprising at least one coil emitting an emission magnetic field; a receiver (20) comprising at least one receiving coil and a device providing a plurality of measurements Ipi of a receiving magnetic field induced by the emission field in each receiving coil; and a processing unit (25) comprising a field model allowing the calculation of a position (P) and/or an orientation (Q) of the receiver by means of calculation of a prediction Hi of the measurements according to a criterion (C) calculated according to an error Ei which is itself calculated in relation to the measurements Ipi.

Abstract: The invention relates to a method for calibrating a magnetic locator, said magnetic locator including at least a transmitter and a receiver, the calibration method involving a third sensor constituted of a transceiver, said method including, transmission of a first magnetic field by the transmitter and reception of first signals generated in the receiver by said magnetic field (S1), transmission of a second magnetic field by the transmitter and reception of second signals generated in the transceiver by said magnetic field (S2), transmission of a third magnetic field by the transceiver and reception of third signals generated in the receiver by said magnetic field (S3), the calibration method including the determination (S4) of at least a magnetic moment of the transmitter and a magnetic moment of the receiver from the first signals, second signals and third signals.

Abstract: A patient-specific surgical guide including at least one guiding element for guiding a surgical instrument to treat a subcutaneous anatomical structure of the patient. A first patient-specific contact element with a first patient-specific contact surface to fit a portion of the subcutaneous anatomical structure is rigidly connected to the at least one guiding element. The patient-specific surgical guide includes at least one second patient-specific contact element having at least one support element for supporting a percutaneous pin or needle whose tip is intended to contact a point of the subcutaneous anatomical structure or an anatomical structure rigidly connected thereto. An elongated junction member rigidly couples the at least one guiding element to the at least one second contact element.

Abstract: A method for detecting an anomaly, associated with a magnetic locating device including a first magnetic element and a second magnetic element that are associated with a first object and with a second object, respectively. The first object includes a first movement sensor configured to determine a first datum dependent on inclination of the first object in a basic reference frame, or the terrestrial reference frame. The method includes: determining the first datum from the first movement sensor; determining a second datum dependent on inclination of the second object in the basic reference frame; determining at least one orientation parameter with the magnetic locating device using the first and second magnetic elements; using the at least one orientation parameter and the first and second data to generate an indicator of presence of the anomaly.

Abstract: The invention relates to a method for constructing a patient-specific surgical guide comprising at least one contact element comprising a contact surface intended to match an anatomical structure to be treated and at least one guiding element for guiding a surgical instrument to treat said anatomical structure, said method comprising: —receiving a 3D medical image of the anatomical structure of the patient; —determining, in said 3D medical image, at least one region of interest containing a portion of the external surface of the anatomical structure intended to match a respective contact element of the surgical guide; —segmenting the 3D medical image in said determined region of interest so as to locally reconstruct the external surface of the anatomical structure; —computing the contact surface of the contact element from said reconstructed local surface of the anatomical structure; —constructing the at least one contact element to include the contact surface.

Abstract: A method for detecting an anomaly, associated with a magnetic locating device including a first magnetic element and a second magnetic element that are associated with a first object and with a second object, respectively. The first object includes a first movement sensor configured to determine a first datum dependent on inclination of the first object in a basic reference frame, or the terrestrial reference frame. The method includes: determining the first datum from the first movement sensor; determining a second datum dependent on inclination of the second object in the basic reference frame; determining at least one orientation parameter with the magnetic locating device using the first and second magnetic elements; using the at least one orientation parameter and the first and second data to generate an indicator of presence of the anomaly.

Abstract: The invention relates to an electromagnetic position tracking system, including: an electromagnetic field emission device including at least one emitter coil and, connected to the emitter coil, a first generator of an electric signal for exciting the emitter coil; a device for receiving the electromagnetic field emitted by the emission device, including at least one receiver coil, and, connected to the receiver coil, a circuit for reading an electric signal induced in the receiver coil; and a system for measuring at least one parameter of the reception device, including, connected to the receiver coil, a second generator of an electric signal for exciting the receiver coil.

Abstract: The invention relates to a surgical method of attachment of a first bony segment in relation with a second bony segment, both segments belonging to a same bone, which comprises the steps of: milling said bone and cutting it partially, to separate it in two bony segments linked together by a bony hinge distracting both bony segments around said hinge; fitting an osteotomy implant into the cavity thus obtained; attaching said implant to both bony segments; wherein it comprises the preoperative steps of: determining the position and the direction of the future partial cut, calculating its depth, calculating the relative three-dimensional positions of both bony segments to obtain the final desired alignment of the two bony segments, choosing among several osteotomy implants, one which is wider than the largest distance between the facing sides of said bony segments after distraction, determining the position and the shape of the future implant reception cavity and calculating its dimensions, deducing therefrom

Abstract: The invention relates to a device for working material, in particular for working tissue or bone, comprising a tool head and a tool arranged thereon, wherein the tool head (WK) has at least one support element (2) which is adjustable relative thereto and by means of which the tool head (WK) can be supported on the surface of a material (4) that is to be worked, wherein the position of the tool (1) relative to a material surface to be worked is adjustable through controlled or regulated adjustment of the at least one support element (2) by means of an actuator, depending on data that can be fed to a controlling/regulating unit of the at least one actuator during working of the material.