Surgery – Truss – Pad
Patent
1982-06-24
1984-02-14
Howell, Kyle L.
Surgery
Truss
Pad
73606, A61B 1000
Patent
active
044310080
ABSTRACT:
A system for the non-invasive inspection of a living organism utilizes two ultrasonic fields, one of which is produced by a perturbing beam transmitting transducer to perturb an internal region of tissue at a focal region which may be subject to movement. The second ultrasonic field consists of a set of ultrasonic beams, constituting a sense beam and reference beams, and which may be portions of a single beam or a plurality of separate beams and which are directed through and near the focal region of the perturbing field before and/or after perturbation. The time of flight differences of the sense beam and reference beams are detected by a plurality, preferably at least three, receiving transducers whose outputs are processed by a digital computer system, interacting with the signal analysis electronics, to derive information concerning the internal tissue of the living organism. The measurement is based upon time of flight differences ("phase differences" for small-angle variances) of each beam which are the timed differences between the times of flight of coherent bursts of ultrasonic waves.
REFERENCES:
patent: 3771355 (1973-11-01), Sachs
patent: 4059010 (1977-11-01), Sachs
Janney Clinton D.
Wanner James F.
Foley Deidre A.
Gerber Eliot S.
Howell Kyle L.
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