Title :
Quantitative assessment of the phase tracking method for measurement of the elastic characteristics of arterial wall
Author :
Suginouchi, Takehiko ; Kato, Makoto ; Hashimoto, Masahiko ; Tan-naka, Yoshinao ; Kanai, Hiroshi
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Kyoto, Japan
Abstract :
The minute change in thickness of the arterial wall during one heartbeat is measured by the phase tracking method based on the constraint least squares method that detects displacement of the arterial wall with high precision from the instantaneous phase of the reflected wave, and then the elastic characteristic is detected. However, a propagation-attenuation effect introduces the error due to the shift of the center frequency in the reflected wave. In this paper, using a modified quadrature detection method, the thickness change of the vessel phantom has been measurable by 0.5 μm accuracy
Keywords :
biomechanics; biomedical ultrasonics; blood vessels; least squares approximations; arterial wall; blood vessel phantom; constraint least squares method; displacement measurement; elastic characteristics; heartbeat; medical ultrasound; phase tracking; propagation-attenuation effect; quadrature detection; reflected wave; Acoustic pulses; Arteries; Communication industry; Displacement measurement; Electric variables measurement; Phase measurement; Pulse measurements; Thickness measurement; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.992029
