Patent ID: 11857305
Assignee: MEDFIELD DIAGNOSTICS AB
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. A method performed by a system for detecting an internal object in a body, the internal object and the body having different dielectric properties, the body being initially substantially symmetric and having a symmetry line which represents a division of the body in two body parts that are counterparts, each of the body parts on a respective side of the symmetry line being substantially symmetric in shape, each of the body parts on the respective side of the symmetry line being initially substantially symmetric in content when no internal object is located in the body, the internal object being asymmetrically disposed with respect to the symmetry line of the body when the internal object is located in the body, the system including at least one antenna pair including two antennas configured to be positioned directly opposite one another in relation to the body and on opposite sides of the symmetry line in the respective counterparts of the body such that one of the antennas in the antenna pair is configured to be symmetrically positioned around the body with respect to the other antenna in the antenna pair and in relation to the symmetry line, the method comprising: transmitting at least one microwave signal into the body from at least one of the antennas, the transmitted at least one microwave signal being reflected and/or scattered from the internal object;
receiving reflected and/or scattered microwave signal at one or more of: (i) the other antenna and (ii) the transmitting antenna whereby the one or more of the other antenna and the transmitting antenna is operated as a receiver after the transmitting antenna transmits the at least one microwave signal or the one or more of the other antenna and the transmitting antenna is operated as a receiver at the same time as the one or more of the other antenna and the transmitting antenna is transmitting;
comparing the received microwave signals at the symmetrically positioned antennas; and
detecting, based on an analysis of one or more of: (i) a plurality of asymmetries, and (ii) changes in asymmetries in the received microwave signals, the internal object or a change in an already-detected internal object when there is a difference between the received microwave signals at symmetric antenna pairs, the asymmetries including asymmetries in received p-n sequence data of the received microwave signals, the difference being related to the different dielectric properties between the internal object and the body,
wherein the body is one of a head, a brain, an abdomen, a thorax, and a leg, and
wherein the antennas of each of the at least one antenna pair are directly opposite one another with respect to the body on a plane passing through the body and perpendicular to the symmetry line.