Surgery – Truss – Pad
Patent
1990-09-07
1992-01-07
Jaworski, Francis
Surgery
Truss
Pad
12866109, 12866005, A61B 806
Patent
active
050781464
ABSTRACT:
A B-mode Doppler flow mapping apparatus includes a transducer for radiating an ultrasonic wave to an object, and receiving an ultrasonic wave reflected by the object, a scanning circuit for controlling the transducer to change a radiation direction of the ultra-sonic wave in such a manner that a given slice of the object is scanned by the ultrasonic waves while the ultrasonic waves are repeatedly radiated n (n.gtoreq.2) number of times, each repetition being after the completion of a given number of radiations, a B-mode processor for obtaining a tomographic image of the slice by detecting the intensity of the ultrasonic waves received, and a color mapping processor for detecting a Doppler shift frequency of the ultrasonic wave received, and performing a color display of a blood flow in the tomographic image in accordance with the Doppler shift frequency. The apparatus includes a manual operating member for a designating an approximate flow rate of a blood flow in the slice, and a control circuit for controlling the scanning circuit in accordance with the flow rate designated by the manual operating member and changing the given number of radiations so as to change a sampling frequency for detecting a Doppler shift frequency, and to set optimal upper and lower limits of detectable Doppler shift frequencies.
REFERENCES:
patent: 4888694 (1989-12-01), Chesarek
patent: 4911171 (1990-03-01), Uchibori
patent: 4918605 (1990-04-01), Shirasaka
patent: 4930514 (1990-06-01), Baba et al.
patent: 4966151 (1990-10-01), Takeuchi
patent: 4993417 (1991-02-01), Seo
patent: 5014710 (1991-05-01), Masiak et al.
Jaworski Francis
Kabushiki Kaisha Toshiba
Manuel George
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