G - Physics – 01 – F
Patent
G - Physics
01
F
349/39
G01F 1/66 (2006.01) A61B 8/06 (2006.01)
Patent
CA 2020056
ABSTRACT OF THE DISCLOSURE Pulses of an ultrasonic wave beam are emitted into a body at a predetermined repetition period. Echo pulses of the ultrasonic wave beam are received via a plurality of different channels. Each of the received pulses is converted into corresponding electric signals of the respective channels. A pair of adders invert signs of alternate ones of pairs of the electric signals of adjacent channels, summing the inverted sign electric signals with remaining non-inverted sign electric signals, converting the electric signals into a pair of complex signals having phases which are spatially different from each other by 90 degrees. An autocorrelation function of the complex signals is calculated. A component of a speed of moving matter within the body in a predetermined direction is calculated on the basis of the autocorrelation function. The moving matter causes the echo pulses. The predetermined direction is perpendicular to a direction of travel of the ultrasonic wave beam pulses.
Kawabuchi Masami
Nakamura Yasuhiro
Sakai Ikuo
Gowling Lafleur Henderson Llp
Kawabuchi Masami
Matsushita Electric Industrial Co. Ltd.
Nakamura Yasuhiro
Sakai Ikuo
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