Minmaxmedical

Loic Huguel

Mickael Chave

Sandra Rousseau

The invention relates to a method for compensating a magnetic locator in the presence of a magnetic-field-disturbing material, comprising: an emitter () comprising at least one coil emitting an emission magnetic field; a receiver () comprising at least one receiving coil and a device providing a plurality of measurements Ipof a receiving magnetic field induced by the emission field in each receiving coil; and a processing unit () 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 Hof the measurements according to a criterion (C) calculated according to an error Ewhich is itself calculated in relation to the measurements Ip. The invention is characterised in that the error Eis calculated by successive iterations from initial values prescribed by the prediction Has being the difference between the measurements Ipand a disturbed model Hp, according to the equation E=Ip&#x2212;Hp, the disturbed model Hpsatisfying Hp=H+P(&#x3b1;=&#x2212;arctan(&#x3b2;&#x3c9;), (I) the parameter &#x3b2; being identical for all of the measurements Ip, the calculation being carried out in such a way as to minimise the criterion C.

Method for compensating a magnetic locator, locator and computer program

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,

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Grenoble, France

Loic Huguel