Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-11-24
1999-07-27
Lateef, Marvin M.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600455, A61B 800
Patent
active
059281537
ABSTRACT:
An ultrasound flow velocity and Doppler angle measurement method and system is provided for measuring the velocity and direction of a flow, such as the blood flow in a human body, in a non-contact manner through ultrasound means. In practical applications, this ultrasound flow velocity measurement method and system can be utilized, for example, in the field of physiological diagnosis for blood-flow velocity measurement to determine whether the patient suffers from blood vessel disorders, such as embolism and aneurysm. Precise measurement can be achieved through the use of just one set of ultrasound transducer in the system configuration; therefore, this ultrasound flow velocity measurement method and system is simpler in system configuration and more cost-effective to use than the prior art. Experimentation shows that the estimation has a standard deviation of less than 4.5.degree. for Doppler angle range from 45.degree. to 80.degree.. Therefore, the measurement results are trustworthy to use.
REFERENCES:
patent: 5148808 (1992-09-01), Satake
patent: 5409010 (1995-04-01), Beach et al.
Chiang Hui-Hua
Lee Bor-Ray
Chiang Hui-Hua
Lateef Marvin M.
Patel Maulin
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