Surgery – Truss – Pad
Patent
1990-09-20
1992-11-17
Jaworski, Francis
Surgery
Truss
Pad
A61B 806
Patent
active
051634341
ABSTRACT:
An ultrasonic diagnostic apparatus includes an ultrasonic transmitting/receiving section for transmitting an ultrasonic wave into an object to be examined and receiving an ultrasonic echo of the transmitted ultrasonic wave, a detecting section for detecting a frequency shift component from an ultrasonic echo signal obtained by the ultrasonic transmitting/receiving section, a filter section for removing a clutter component from a detection signal obtained by the detecting section and extracting only a required Doppler shifted signal, an analyzing section for obtaining, by frequency analysis, Doppler data only from that component of the Doppler shifted signal which has power exceeding a predetermined blank level, a setting section for setting system conditions influencing the noise level of the Doppler shifted signal, and a control section for substantially controlling the blank level of the analyzing section in accordance with the conditions set by the setting section.
REFERENCES:
patent: 4324258 (1982-04-01), Huebscher et al.
patent: 4541437 (1985-09-01), Amemiya
patent: 4593700 (1986-06-01), Hayakawa et al.
patent: 4683893 (1987-08-01), Mayo
patent: 4830016 (1989-05-01), Tamano et al.
patent: 4850364 (1989-07-01), Leavitt
Jaworski Francis
Kabushiki Kaisha Toshiba
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