Next Article in Journal
Failure Monitoring and Condition Assessment of Steel-Concrete Adhesive Connection Using Ultrasonic Waves
Next Article in Special Issue
A PSF-Shape-Based Beamforming Strategy for Robust 2D Motion Estimation in Ultrafast Data
Previous Article in Journal
Imaging Electron Dynamics with Ultrashort Light Pulses: A Theory Perspective
Previous Article in Special Issue
Riding the Plane Wave: Considerations for In Vivo Study Designs Employing High Frame Rate Ultrasound
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessFeature PaperArticle
Appl. Sci. 2018, 8(3), 319; doi:10.3390/app8030319

Quasi-Static Elastography and Ultrasound Plane-Wave Imaging: The Effect of Beam-Forming Strategies on the Accuracy of Displacement Estimations

1
Medical UltraSound Imaging Center, Department of Radiology and Nuclear Medicine, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
2
Physics of Fluids Group, MIRA, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 22 December 2017 / Revised: 15 February 2018 / Accepted: 17 February 2018 / Published: 26 February 2018
(This article belongs to the Special Issue Ultrafast Ultrasound Imaging)
View Full-Text   |   Download PDF [5443 KB, uploaded 26 February 2018]   |  

Abstract

Quasi-static elastography is an ultrasound method which is widely used to assess displacements and strain in tissue by correlating ultrasound data at different levels of deformation. Ultrafast plane-wave imaging allows us to obtain ultrasound data at frame rates over 10 kHz, permitting the quantification and visualization of fast deformations. Currently, mainly three beam-forming strategies are used to reconstruct radio frequency (RF) data from plane-wave acquisitions: delay-and-sum (DaS), and Lu’s-fk and Stolt’s-fk operating in the temporal-spatial and Fourier spaces, respectively. However, the effect of these strategies on elastography is unknown. This study investigates the effect of these beam-forming strategies on the accuracy of displacement estimation in four transducers (L7-4, 12L4VF, L12-5, MS250) for various reconstruction line densities and apodization/filtering settings. A method was developed to assess the accuracy experimentally using displacement gradients obtained in a rotating phantom. A line density with multiple lines per pitch resulted in increased accuracy compared to one line per pitch for all transducers and strategies. The impact on displacement accuracy of apodization/filtering varied per transducer. Overall, Lu’s-fk beam-forming resulted in the most accurate displacement estimates. Although DaS in some cases provided similar results, Lu’s-fk is more computationally efficient, leading to the conclusion that Lu’s-fk is most optimal for plane wave ultrasound-based elastography. View Full-Text
Keywords: quasi-static; elastography; ultrasound; beam-forming; delay-and-sum; Stolt’s; Lu’s; displacements; apodization; lateral displacement; axial displacement quasi-static; elastography; ultrasound; beam-forming; delay-and-sum; Stolt’s; Lu’s; displacements; apodization; lateral displacement; axial displacement
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Hendriks, G.A.; Chen, C.; Hansen, H.H.; de Korte, C.L. Quasi-Static Elastography and Ultrasound Plane-Wave Imaging: The Effect of Beam-Forming Strategies on the Accuracy of Displacement Estimations. Appl. Sci. 2018, 8, 319.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top