Enhancing time-frequency parameters estimation for Doppler Ultrasound blood-flow signals

2011 ◽  
Author(s):  
Behrooz Zabihian ◽  
M. Graca Ruano
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Parameters Estimation ◽  
Time Frequency

Time-frequency blood flow parameters estimation for micro-emboli detection

2015 ◽  
Author(s):  
Blaise Kevin Guepie ◽  
Bruno Sciolla ◽  
Fabien Millioz ◽  
Romain Ramassamy ◽  
Emilie Pinatel ◽  
...  
Keyword(s):  
Blood Flow ◽  
Parameters Estimation ◽  
Time Frequency ◽  
Flow Parameters ◽  
Emboli Detection

Time-Frequency Analysis of the Blood Flow Doppler Ultrasound Signal

2001 ◽  
Vol 40 (Part 1, No. 5B) ◽  
pp. 3882-3887 ◽  
Author(s):  
Yasuaki Noguchi ◽  
Eiichi Kashiwagi ◽  
Kohtaro Watanabe ◽  
Fujihiko Matsumoto ◽  
Suguru Sugimoto
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Frequency Analysis ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Ultrasound Signal

NUMERICAL TECHNIQUES FOR MODELING DOPPLER ULTRASOUND SPECTRA SYSTEMS

2001 ◽  
Vol 09 (03) ◽  
pp. 805-814 ◽  
Author(s):  
M. GRAÇA RUANO
Keyword(s):  
Blood Flow ◽  
Fourier Transform ◽  
Real Time ◽  
Doppler Ultrasound ◽  
High Performance ◽  
Cost Benefit ◽  
Spectral Parameters ◽  
Frequency Distributions ◽  
Time Frequency ◽  
Spectral Models

Evaluation of blood-flow Doppler ultrasound spectral content is currently performed on clinical diagnosis. Since mean frequency and bandwidth spectral parameters are determinants on the quantification of stenotic degree, more precise estimators than the conventional Fourier transform should be seek. This paper summarizes studies led by the author in this field, as well as the strategies used to implement the methods in real-time. Regarding stationary and nonstationary characteristics of the blood-flow signal, different models were assessed. When autoregressive and autoregressive moving average models were compared with the traditional Fourier based methods in terms of their statistical performance while estimating both spectral parameters, the Modified Covariance model was identified by the cost/benefit criterion as the estimator presenting better performance. The performance of three time-frequency distributions and the Short Time Fourier Transform was also compared. The Choi–Williams distribution proved to be more accurate than the other methods. The identified spectral estimators were developed and optimized using high performance techniques. Homogeneous and heterogeneous architectures supporting multiple instruction multiple data parallel processing were essayed. Results obtained proved that real-time implementation of the blood-flow estimators is feasible, enhancing the usage of more complex spectral models on other ultrasonic systems.

High-frequency doppler ultrasound examination of blood flow in the anterior segment of the eye

1998 ◽  
Vol 126 (4) ◽  
pp. 597-600 ◽  
Author(s):  
Charles J. Pavlin ◽  
Don A. Christopher ◽  
Peter N. Burns ◽  
F.Stuart Foster
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
High Frequency ◽  
Ultrasound Examination ◽  
Anterior Segment

scholarly journals Effects of Isoflurane on Coronary Blood Flow Velocity in Young, Old and ApoE−/− Mice Measured by Doppler Ultrasound

2007 ◽  
Vol 33 (4) ◽  
pp. 512-521 ◽  
Author(s):  
Craig J. Hartley ◽  
Anilkumar K. Reddy ◽  
Sridhar Madala ◽  
Lloyd H. Michael ◽  
Mark L. Entman ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Coronary Blood Flow ◽  
Doppler Ultrasound ◽  
Blood Flow Velocity ◽  
Young Old ◽  
Coronary Blood Flow Velocity
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