Abstract: An apparatus and method for imaging a tissue. The method includes transmitting a first microwave frequency signal to and receiving a first total signal from the tissue at a first position. A second microwave frequency signal is transmitted to and a second total signal received from the tissue at a second position. The first total signal is calibrated with respect to the second total signal and an image is constructed from the calibrated signal.

Abstract: Systems, apparatus, and method of monitoring a position of a joint. An inertial monitoring unit is configured to be coupled to a portion of a patient, such as a thigh. Another inertial monitoring unit is configured to be attached to another portion of the patient, such as a shank, that is connected to the other portion by a joint, such as a knee. The inertial monitoring units detect motion of their respective portions of the patient and transmit data indicative of this motion. These transmissions may be received by a computer and used to determine an orientation of the joint. The inertial monitoring units may also be coupled to vibration detection units and/or ultrasound modules that provide additional data regarding a condition of the joint.

Abstract: Methods and a system of determining a condition of a joint. A first signal indicative of a vibration generated by motion of the joint is received in a processor. The processor generate a vibroarthrograph from the first signal and extract a first signal feature from the vibroarthrograph based on a first statistical parameter of the vibroarthrograph. The first signal feature is then compared to a plurality of signal features in a database, each of the plurality of signal features in the database being associated with at least one joint condition. A condition of the joint may then be determine based at least in part on a correspondence between the first signal feature and a signal feature of the plurality of signal features in the database. Multiple signal features may also be combined into one or more functions that provide separation between vibrations from healthy joints and vibrations from injured joints.