초록 ▼

Splines of magnetic field values are used by a processor to determine location parameters in a remote location determination system. The location determination system is used on a laser catheter that is operable to perform myocardial revascularization. An automatic calibration technique compensates

Splines of magnetic field values are used by a processor to determine location parameters in a remote location determination system. The location determination system is used on a laser catheter that is operable to perform myocardial revascularization. An automatic calibration technique compensates for any variations in gain in a sensor and related components. Methods for reducing the effects of eddy currents in surrounding conductive objects are used in electromagnetic position and orientation measurement systems.

대표청구항 ▼

1. A remote object location determining system comprising:a generation subsystem having at least one transducer operable to produce an electromagnetic field; a sensing subsystem having at least one transducer operable to measure an electromagnetic field produced by the generation subsystem; a driver

1. A remote object location determining system comprising:a generation subsystem having at least one transducer operable to produce an electromagnetic field; a sensing subsystem having at least one transducer operable to measure an electromagnetic field produced by the generation subsystem; a driver operable to apply excitation waveforms to the generation subsystem; and a processor operably connected to receive sensor signals from the sensing subsystem, and to determine at least two location parameters by comparing measured magnetic field values to a function of splines corresponding to magnetic field values; and wherein at least one of the generation subsystem and the sensing subsystem has a plurality of transducers.