Experimental validation of a new method for 3-D vector flow imaging in the frequency domain

Conference paper (2020)

Authors

S. Rossi University of Florence

F. Fool ImPhys/Medical Imaging -

Alessandro Ramalli University of Florence

Piero Tortoli University of Florence

Research Group

ImPhys/Medical Imaging () (TU Delft)

Frequency domain Ultrasound 3-D Sparse arrays Spiral arrays Vector velocity imaging Vector Doppler High-frame-rate Plane wave

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http://resolver.tudelft.nl/uuid:74bb74b7-ac62-4eba-8340-9baeaac84d4a

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Published Date

2020

Language

English

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Medical Imaging

Abstract

Current 3-D Vector Flow Imaging (VFI) techniques are typically limited by either low temporal resolution and/or high computational cost. In this work, we illustrate a 3-D high frame rate VFI method, which efficiently splits the 3-D (x, y, z) displacement estimation in two separate 2-D VFI estimations operated in the frequency domain. The echo-data received after the transmission of plane waves are beamformed and high-pass filtered before being VFI processed. The new method was experimentally tested by using the ULA-OP 256 research system connected to a 3 MHz, 256-element, 2-D spiral array. Phantom experiments were conducted in steady laminar flow conditions for different probe-to-flow angles. For the tested conditions, the mean relative bias was 11.5% with a standard deviation of 10.9%. The 2-step approach applied to the 2-D VFI technique makes the new 3-D VFI method accurate and computationally efficient.

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