A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61B DIAGNOSIS; SURGERY; IDENTIFICATION
5/00 Measuring for diagnostic purposes; Identification of persons
A61B5/06 Devices, other than using radiation, for detecting or locating foreign bodies; ; Determining position of diagnostic devices within or on the body of the patient
A61B5/061 Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
A61B5/062 using magnetic field