Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Reexamination Certificate
2002-07-03
2009-08-04
Casler, Brian L. (Department: 3768)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
C324S638000, C600S407000, C600S408000, C600S430000
Reexamination Certificate
active
07570063
ABSTRACT:
Microwave imaging via space-time beamforming is carried out by transmitting microwave signals from multiple antenna locations into an individual to be examined and receiving the backscattered microwave signals at multiple antenna locations to provide received signals from the antennas. The received signals are processed in a computer to remove the skin interface reflection component of the signal at each antenna to provide corrected signal data. The corrected signal data is provided to a beamformer process that time shifts the received signals to align the returns from a scatterer at a candidate location, and then passes the time aligned signals through a bank of filters, the outputs of which are summed, time-gated and the power therein calculated to produce the beamformer output signal at a candidate location. The beamformer is then scanned to a plurality of different locations in the individual by changing the time shifts, filter weights and time-gating of the beamformer process. The output power may be displayed as a function of scan location, with regions of large output power corresponding to significant microwave scatterers such as malignant lesions.
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Bond Essex Julian
Hagness Susan C.
Li Xu
Van Veen Barry D.
Casler Brian L.
Cattungal Sanjay
Foley & Lardner LLP
Wisconsin Alumni Research Foundation
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