초록 ▼

In a method and apparatus for determining the position of a catheter inside the body of a patient, position signals are transmitted between the catheter and a position location unit, located at a distance from the catheter, the position signals are transmitted during a calibration stage from known c

In a method and apparatus for determining the position of a catheter inside the body of a patient, position signals are transmitted between the catheter and a position location unit, located at a distance from the catheter, the position signals are transmitted during a calibration stage from known calibration positions inside the body, or position signals, transmitted by the position location unit, are received at the known calibration positions. A correction function is determined from the difference between the calibration positions derived from the received location signals and the known, true calibration positions, whereupon catheter positions, derived from received position signals, are corrected in subsequent measurement stages according to the correction function.

대표청구항 ▼

[ We claim as our invention:] [1.] A method for detecting a position of a catheter when inside a body of a subject, comprising the steps of:inserting a calibration catheter into a body cavity;in a calibration phase, transmitting signals between a plurality of known calibration positions of said cali

[ We claim as our invention:] [1.] A method for detecting a position of a catheter when inside a body of a subject, comprising the steps of:inserting a calibration catheter into a body cavity;in a calibration phase, transmitting signals between a plurality of known calibration positions of said calibration catheter in said body cavity and a position locator, and obtaining, at said position locator, a plurality of apparent calibration positions respectively associated with said known positions but deviating therefrom due to passage of said signals through body tissue;in said calibration phase, generating a correction function from the deviation of said apparent calibration positions from said known calibration positions; andcorrecting, using said correction function, subsequent signals transmitted between a medical procedure catheter in said body cavity and said position locator to obtain an identification of an actual position of said medical procedure catheter in said body cavity.