#$%^&*AU2013257409B220180208.pdf#####ABSTRACT A method, including pressing a distal end of a medical probe against a wall of a body cavity, and receiving from the probe first measurements of a force exerted by the distal end on the wall. The method also includes receiving from the probe second measurements indicating a displacement of the wall in response to the force. The method further includes estimating a thickness of the wall based on the first and the second measurements.3/5 PROBE CALIBRATION METHOD 70- SELECT A FIRST BODY CAVITY WALL HAVING A FIRST THICKNESS 72- PRESS THE DISTAL TIP OF THE PROBE AGAINST THE SELECTED BODY CAVITY WALL 74- COLLECT A FORCE SENSOR INPUT INDICATING THE FORCE EXERTED BY THE DISTAL TIP ON THE WALL 761.., COLLECT A POSITION SENSOR INPUT INDICATING A DISPLACEMENT OF THE WALL IN RESPONSE TO THE FORCE 7811 1 CREATE A CALIBRATION MATRIX ENTRY BASED ON 78THE FORCE SENSOR AND THE POSITION SENSOR INPUTS 80 ADDITIONAL PROMPT THE OPERATOR CALIBRATION FOR YE TO CHANGE THE FORCE THE SELECTED BODY APPLIED TO THE SELECTED CAVITY WALL? BODY CAVITY WALL NOe 84 82 ADDITIONAL SELECT A DIFFERENT BODY BODY CAVITY WALL FOR YS CAVITY WALL HAVING A CALIBRATION? DIFFERENT THICKNESS NO 86 CE D FIG. 3
