Ultrafast compound imaging for 2-D motion vector estimation: application to transient elastography
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- 10 December 2002
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
- Vol. 49 (10), 1363-1374
- https://doi.org/10.1109/tuffc.2002.1041078
Abstract
This paper describes a new technique for two-dimensional (2-D) imaging of the motion vector at a very high frame rate with ultrasound. Its potential is experimentally demonstrated for transient elastography. But, beyond this application, it also could be promising for color flow and reflectivity imaging. To date, only axial displacements induced in human tissues by low-frequency vibrators were measured during transient elastography. The proposed technique allows us to follow both axial and lateral displacements during the shear wave propagation and thus should improve Young's modulus image reconstruction. The process is a combination of several ideas well-known in ultrasonic imaging: ultra-fast imaging, multisynthetic aperture beamforming, 1-D speckle tracking, and compound imaging. Classical beamforming in the transmit mode is replaced here by a single plane wave insonification increasing the frame rate by at least a factor of 128. The beamforming is achieved only in the receive mode on two independent subapertures. Comparison of successive frames by a classical 1-D speckle tracking algorithm allows estimation of displacements along two different directions linked to the subapertures beams. The variance of the estimates is finally improved by tilting the emitting plane wave at each insonification, thus allowing reception of successive decorrelated speckle patterns.Keywords
This publication has 29 references indexed in Scilit:
- An error analysis of Helmholtz inversion for incompressible shear, vibration elastography with application to filter-design for tissue characterizationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Shear elasticity probe for soft tissues with 1-D transient elastographyIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2002
- Investigating a stretched vortex with ultrafast two-dimensional ultrasonic speckle velocimetryPhysics of Fluids, 2001
- Ultrafast two-dimensional ultrasonic speckle velocimetry: A tool in flow imagingApplied Physics Letters, 2001
- Experimental velocity profiles and volumetric flow via two-dimensional speckle trackingJapanese Journal of Clinical Oncology, 1995
- Current time-domain methods for assessing tissue motion by analysis from reflected ultrasound echoes-a reviewIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1993
- Ultrasound Doppler Probing of Flows Transverse with Respect to Beam AxisIEEE Transactions on Biomedical Engineering, 1987
- A New Velocity Estimator for Color Flow MappingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1986
- Measurement of soft tissue motion using correlation between A-scansJapanese Journal of Clinical Oncology, 1982
- Multiple crossed-beam ultrasound Doppler velocimetryIEEE Transactions on Sonics and Ultrasonics, 1978