Patent ID: 9717473
Date: 2017-08-01
CPC Classifications: A61B

Claim:
1. A method of detecting a position within a body, the method comprising: inserting, at a target location within a body, a dipole that is confined within an internal cavity of a capsule, wherein the dipole is free to oscillate or rotate within the internal cavity; applying an electric or a magnetic field in the vicinity of the dipole, wherein the field and the dipole are configured such that the field causes the dipole to oscillate or rotate; directing first ultrasound energy at the dipole from a first position outside of the body; detecting reflections of the first ultrasound energy from the dipole; directing second ultrasound energy at the dipole from a second position outside of the body; detecting reflections of the second ultrasound energy from the dipole; directing third ultrasound energy at the dipole from a third position outside of the body; detecting reflections of the third ultrasound energy from the dipole; and determining a position of the dipole based on