CALIBRATION JIG FOR A FLAT LOCATION PAD

摘要

An apparatus includes a detector assembly, a positioning unit, and interface circuitry. The detector assembly includes an array of multiple magnetic field detectors. The positioning unit is configured to fix the detector assembly at one or more known positions relative to a location pad, which generates magnetic fields for performing position measurements on an intra-body magnetic field detector using a positioning system. The interface circuitry is configured to output electrical signals that are produced by the magnetic field detectors of the detector assembly when the detector assembly is fixed at the known positions, so as to calibrate the position measurements performed by the positioning system. 400r OPERATOR PLACES CAUBRATION JIG 40 WITH MULTIPLE SLOTS ABOVE LOCATION PAD 410 OPERATOR SUDES DETECTOR ASSEMBLY WITH ARRAY OF MAGNETIC FIELD DETECTORS AND MAGNElIC RESONANCE IMAGING (MRI) REFERENCE MARKERS INTO A SLOT IN THE JIG, HOLDING THE ARRAY AT A FIXED HEIGHT ABOVE THE LOCATION PAD 420 PERFORM MAGNETIC FIELD MEASUREMENTS AT THE FIXED HEIGHT 430 PERFORM MRI MEASUREMENTS TO MAP THE MRI REFERENCE MARKERS AT THE FIXED HEIGHT NO 4HAS ENOUGH DATA BEEN ACQUIRED AT DIFFERENT HEIGHTS? 450 FIT MAGNETIC FIELD MODEL OF LOCATION PAD TO MAGNETIC FIELD MEASUREMENTS SYNCHRONIZE THE COORDINATE 460 SYSTEMS OF THE MRI AND THE CATHETER MAGNETIC TRACKING SYSTEMS USING THE FITTED MAGNETIC FIELD MODEL AND THE MRI REFERENCE MARKER MAP