US 12,390,284 B2
Magnetic location sensor and ultrasound array on printed-circuit-board (PCB) of catheter and calibration thereof
Assaf Govari, Haifa (IL); and Andres Claudio Altmann, Haifa (IL)
Assigned to Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed by BIOSENSE WEBSTER (ISRAEL) LTD., Yokneam (IL)
Filed on May 26, 2023, as Appl. No. 18/202,340.
Application 18/202,340 is a division of application No. 17/483,065, filed on Sep. 23, 2021, abandoned.
Prior Publication US 2023/0301724 A1, Sep. 28, 2023
Int. Cl. A61B 34/20 (2016.01); A61B 8/00 (2006.01); A61B 8/08 (2006.01); A61B 8/12 (2006.01); G01R 35/00 (2006.01); G01S 7/52 (2006.01); G01S 15/89 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 8/0833 (2013.01); A61B 8/12 (2013.01); A61B 8/4254 (2013.01); A61B 8/445 (2013.01); A61B 8/4488 (2013.01); A61B 8/587 (2013.01); G01R 35/005 (2013.01); G01S 7/5205 (2013.01); G01S 15/8906 (2013.01); A61B 2034/2046 (2016.02); A61B 2034/2051 (2016.02)] 14 Claims
OG exemplary drawing
 
1. Apparatus for calibration, comprising:
a mount comprising a flexible printed circuit board (PCB), wherein the flexible PCB comprises a curved portion and a flat portion, and wherein the flexible PCB is adapted to hold a medical probe comprising (i) an array of ultrasound transducers that emit an ultrasonic beam and receive reflected ultrasound waves in response to the ultrasound beam, and (ii) a magnetic position sensor;
one or more acoustic targets, which are mounted within a field-of-view of the ultrasonic beam;
multiple magnetic-field generators, configured to generate a magnetic field in a vicinity of the magnetic position sensor; and
a processor, configured to:
receive, from the ultrasound transducers, first signals indicative of reflected ultrasound waves;
receive, from the position sensor, second signals indicative of a position and an orientation of the magnetic position sensor; and
determine, based on the first signals and the second signals, a registration between the magnetic position sensor and the array of ultrasound transducers.
 
10. Method for calibration, method comprising:
holding, with a mount comprising a flexible printed circuit board (PCB), wherein the flexible PCB comprises a curved portion and a flat portion, a medical probe comprising (i) an array of ultrasound transducers that emit an ultrasonic beam and receive reflected ultrasound waves in response to the ultrasound beam, and (ii) a magnetic position sensor;
mounting within a field-of-view of the ultrasonic beam one or more acoustic targets;
generating, via multiple magnetic-field generators, a magnetic field in a vicinity of the magnetic position sensor;
receiving, from the ultrasound transducers, first signals indicative of the reflected ultrasound waves;
receiving, from the position sensor, second signals indicative of a position and an orientation of the position sensor; and
determining, based on the first signals and the second signals, a registration between the position sensor and the array of ultrasound transducers.