ULTRASOUND IMAGING VELOCIMETRY: EFFECT OF BEAM SWEEPING ON VELOCITY ESTIMATION

作者：Zhou Bin; Fraser Katharine H; Poelma Christian; Mari Jean Martial; Eckersley Robert J; Weinberg Peter D; Tang Meng Xing^*

来源：Ultrasound in Medicine and Biology, 2013, 39(9): 1672-1681.

DOI：10.1016/j.ultrasmedbio.2013.03.003

• Ultrasound imaging
• Cardiovascular flow
• Flow measurement
• Particle image velocimetry
• Microbubble contrast agents
• Wall shear stress
• Doppler

As an emerging flow-mapping tool that can penetrate deep into optically opaque media such as human tissue, ultrasound imaging velocimetry has promise in various clinical applications. Previous studies have shown that errors occur in velocity estimation, but the causes have not been well characterised. In this study, the error in velocity estimation resulting from ultrasound beam sweeping in image acquisition is quantitatively investigated. The effects on velocity estimation of the speed and direction of beam sweeping relative to those of the flow are studied through simulation and experiment. The results indicate that a relative error in velocity estimation of up to 20% can be expected. Correction methods to reduce the errors under steady flow conditions are proposed and evaluated. Errors in flow estimation under unsteady flow are discussed. (E-mail: [e-mail].

• 出版日期2013-9
• 单位东南大学