Patent ID: 8542017
Filing Date: 2013-09-24
Classification: A61B,G01B

Abstract:
1. A magnetic induction radio sensor configured for measuring the shape of an object, the magnetic induction radio sensor comprising: a magnetic loop antenna configured to at least partially enclose the object, wherein the inductance of the magnetic loop antenna depends on the shape of the object, wherein the magnetic loop antenna is configured to deform as a result of expansion and/or contraction of the object; an antenna matching circuit coupled to the magnetic loop antenna, wherein the antenna matching circuit comprises an adjustable capacitance module configured to provide a particular capacitance such that the magnetic loop antenna and the antenna matching circuit form a resonant circuit and the resonant circuit has a fixed resonant frequency; and a measuring unit configured to generate a measurement value using the particular capacitance of the adjustable capacitance module, the measurement value representing a measurement of the shape of the object, wherein the object is an organ of a patient, and wherein the magnetic loop antenna is integrated in a stretchable strap that at least partially encloses the organ of the patient.