Title :
An improved method for estimating the blood flow velocity vector using aperture domain data
Author :
Yu, Angning ; Peng, Hu
Author_Institution :
Dept. of Electron. Sci. & Technol., Univ. of Sci. & Technol. of China, Hefei
Abstract :
Most conventional blood flow estimation methods measure only the axial component of the blood velocity vector. In our study, we developed a method for two-dimensional blood velocity vector estimation in which, first, similar to reference[1], a function from the time shifts to the channel positions is constructed, and then different from method in paper, the function is transformed into an overdetermined system of linear equations in the two variables of the axial and lateral components, and an approximate solution is found using the method of least squares. Since no unnecessary approximation is employed, our method has a higher accuracy than reference [1].
Keywords :
biomedical ultrasonics; blood flow measurement; least squares approximations; vectors; aperture domain data; axial component; lateral component; least square approximate solution method; linear equation; medical ultrasound; two-dimensional blood flow velocity vector estimation; Apertures; Autocorrelation; Blood flow; Differential equations; Estimation error; Fluid flow measurement; Least squares approximation; Polynomials; Transducers; Vectors; Doppler; ultrasound; vector velocity;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0393