Patent ID: 8320711

Claim:
A method of medical imaging, comprising: generating fields with field generating coils defining a coordinate space; creating an anatomical map of an inner wall of a cavity in a body of a subject by inserting a probe into the body and collecting data using the probe in the coordinate space; creating a three dimensional (3-D) ultrasound image of the cavity, wherein creating the 3-D ultrasound image comprises determining first coordinates of pixels of the 3-D ultrasound image in the coordinate space, and bringing the probe into contact with the inner wall of the cavity and measuring second coordinates in the coordinate space of one or more locations on the inner wall and wherein the anatomical map is created using a first probe, and wherein the 3-D ultrasound image is captured using a second probe comprising an ultrasonic transducer, wherein the first probe and the second probe comprise respective first and second position sensors, and wherein the method comprises using the position sensors to sense the generated fields from the field generating coils and calculating positions of the first probe and the second probe responsively to the sensed fields; and delineating a 3-D contour in the 3-D image based on the map.