Abstract: The present invention relates to an electrode configured to be fixable relative to a target area within a body, the electrode comprises: a positioning device for tracking variations of a position of the electrode relative to a radiation source, a dose measuring unit to detect administered dose in the target area from the radiation source, and an identification unit. The identification unit and the dose measuring unit are configured to be connectable to an externally arranged control unit via a first pair of electrical connections. The identification unit comprises: an electronic identification tag, and a switch configured to alternate between a first mode in which administered dose from the radiation source may be detected in the dose measuring unit, and a second mode in which the identification tag may be read by the externally arranged control unit.

Abstract: The present invention relates to a model based positioning system that includes a positioning device having at least one transmitter configured to be in a tracking environment, e.g. inserted into a body, a receiver having a plurality of receiver elements arranged outside the tracking environment, a control unit configured to measure amplitude and/or phase information of a signal transmitted from the at least one transmitter and received at each receiving element, and a memory unit for storing a model for each receiving element. The control unit is also configured to estimate the position P of the positioning device by comparing the model for each receiving element with the measured received signal for each receiving element.

Abstract: The present invention relates to a model based positioning system that includes a positioning device having at least one transmitter configured to be in a tracking environment, e.g. inserted into a body, a receiver having a plurality of receiver elements arranged outside the tracking environment, a control unit configured to measure amplitude and/or phase information of a signal transmitted from the at least one transmitter and received at each receiving element, and a memory unit M for storing a model for each receiving element. The control unit is also configured to estimate the position P of the positioning device by comparing the model for each receiving element with the measured received signal for each receiving element.

Abstract: The present invention relates to a positioning device 10, 20, 30, 40, 50 arranged in relation to a target area inside a body. The device comprises at least one transmitter 11, 21-22, 32, 41, 51, and each transmitter is arranged to emit an electromagnetic signal. The electromagnetic signal is adapted to propagate with a wavelength in the body so that a phase difference and/or an amplitude difference of said electromagnetic signal in at least three positions 18 is detectable by a receiver 19 for tracking variations of a position of the positioning device relative to the receiver. The wavelength is selected so that a distance from the transmitter to each of the three positions is within the same integer number of wavelengths of the electromagnetic signal. Each transmitter is connectable to an externally arranged control unit 15, where said electromagnetic signal of each transmitter is generated before transmission. Each transmitter and receiver preferably operates in a near field region.