3-D Vector Flow Estimation With Row–Column-Addressed Arrays

摘要: Simulation and experimental results from 3-D vector flow estimations for a 62 + 2-D row–column (RC) array with integrated apodization are presented. A method implementing transverse oscillation (TO) velocity estimator on 3-MHz RC is developed validated. First, parametric simulation study conducted, where direction, ensemble length, number of pulse cycles, steering angles, transmit/receive apodization, TO profiles spacing varied, to find the optimal parameter configuration. The performance evaluated respect relative mean bias ${\tilde {B}}$ standard deviation {\sigma }}$ . Second, configuration implemented prototype probe connected ultrasound scanner SARUS. Results measurements conducted in flow-rig system containing constant laminar straight-vessel phantom pulsating Both an M-mode steered transmit sequence applied. estimated rig four representative directions. In setup 90° beam-to-flow angle, across entire profile (−4.7, −0.9, 0.4)% (8.7, 5.1, 0.8)% ( $v_{x}, v_{y}, v_{z}$ ). peak 48.5 ± 3 cm/s giving −3% bias. out-of-plane component perpendicular cross section used estimate volumetric rates at angle. rate this 91.2 3.1 L/h corresponding −11.1%. setup, measured during five cycles 2.3 0.1 mL/stroke negative 9.7% It concluded that accurate estimation can be obtained using RC-addressed array.