Surgery – Truss – Pad
Patent
1992-03-04
1994-08-30
Jaworski, Francis
Surgery
Truss
Pad
7386125, A61B 806
Patent
active
053418093
ABSTRACT:
A flowmeter employing an array of ultrasonic wave transducer elements, the flowmeter being arranged in such a way that reception signals of plural reception beams aligned in parallel with one another are formed from detection signals of reflection ultrasonic waves from the transducer elements; the Fourier transformation is performed with respect to a direction of alignment of the reception beams; a moving target indication processing is then performed among a plurality of reception signals derived from the repetitive transmissions; the result of the Fourier transformation is treated as two-dimensional signals of time series corresponding to the transmission of the ultrasonic wave, and with respect to a plurality of straight lines coinciding at respective angles with the origin of a coordinate, signal values on each of the straight lines are treated as a one-dimension sequence of numbers to perform the Fourier transformation; and an axial velocity component and a lateral (transverse) velocity component of a moving object are obtained on the basis of the resulting signal distribution.
REFERENCES:
patent: 4265126 (1981-05-01), Papadofrangokis et al.
patent: 4759375 (1988-07-01), Namekawa et al.
patent: 4905206 (1990-02-01), Nishiyama et al.
patent: 4930513 (1990-06-01), Mayo et al.
patent: 4979513 (1990-12-01), Sakai et al.
patent: 5201313 (1993-04-01), Katakura
IEEE Transactions on Sonics and Ultrasonics, vol. SU-32, No. 3, May 1985, pp. 458-464.
Hitachi , Ltd.
Jaworski Francis
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