Medical diagnosis, treatment and imaging systems

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/095 (2006.01) A61B 5/06 (2006.01) A61B 5/0402 (2006.01) A61B 8/12 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2197986

A locating system for determining the location and orientation of an invasive medical instrument, for example a catheter (10) or endoscope, relative to a reference frame, comprising: a plurality of field generators ( 18, 20, 22) which generate known, distinguishable fields, preferably continuous AC magnetic fields, in response to drive signals; a plurality of sensors (30, 32, 34) situated in the invasive medical instrument (10) proximate the distal end thereof which generate sensor signals in response to said fields; and a signal processor (26) which has an input for a plurality of signals corresponding to said drive signals and said sensor signals and which produces the three location coordinates and three orientation coordinates of a point on the invasive medical instrument.

Système de localisation permettant de déterminer la localisation et l'orientation d'un instrument médical invasif, par exemple un cathéter (10) ou endoscope, par rapport à un repère, qui comprend une pluralité de générateurs de champs (18, 20, 22) qui génèrent des champs connus et possibles à distinguer, de préférence des champs magnétiques c.a. continus, en réponse à des signaux d'excitation, une pluralité de détecteurs (30, 32, 34) situés dans l'instrument médical invasif (10) à proximité de l'extrémité distale dudit instrument, qui génèrent des signaux de détecteur en réponse aux champs, et un processeur de signaux (26) qui possède une entrée pour une pluralité de signaux correspondant aux signaux d'excitation et aux signaux de détecteur et qui produit les trois coordonnées de localisation et les trois coordonnées d'orientation d'un point situé sur l'instrument médical invasif.

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