Title:
ULTRASONIC DIAGNOSTIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/1990/004946
Kind Code:
A1
Abstract:
This invention is directed to obtain an ultrasonic diagnostic apparatus including a CFM system which can easily change algorithms for calculating a flow rate, and the like. The ultrasonic diagnostic apparatus of the present invention includes an A/D convertor for converting a Doppler signal obtained by coherent detection of an echo reflected from a subject to a digital signal, and a flow rate calculation unit for calculating a blood flow rate and rate dispersion on the basis of the Doppler signals from the A/D convertor. The flow rate calculation unit comprises an MTI filter and a calculation unit for processing the output signal of the filter and calculating the blood flow rate and rate dispersion, and both the MTI filter and the calculation unit are composed of a digital signal processor (DSP).
Inventors:
YAMAGUCHI KEIKI (JP)
HIROTA YUICHI (JP)
JIBIKI TAKAO (JP)
HIROTA YUICHI (JP)
JIBIKI TAKAO (JP)
Application Number:
PCT/JP1989/001128
Publication Date:
May 17, 1990
Filing Date:
October 31, 1989
Export Citation:
Assignee:
YOKOGAWA MEDICAL SYST (JP)
International Classes:
A61B8/06; A61K31/55; C07D285/36; G01F1/66; G01P5/24; G01S15/89; (IPC1-7): A61B8/06
Foreign References:
| JPS63240841A | 1988-10-06 |
Other References:
See also references of EP 0440796A4
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