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A New Method of Plane-Wave Ultrasound Imaging Based on Reverse Time Migration
IEEE Transactions on Bio-Medical Engineering
|December 22, 2023
Summary
This study introduces Reverse Time Migration (RTM) for ultrasound plane-wave imaging, improving image quality in heterogeneous tissues. RTM enhances contrast-to-noise ratio and resolution, reducing the need for multiple compounding angles.
Area of Science:
- Ultrasound medical imaging
- Wave propagation and imaging
Background:
- Coherent plane-wave compounding offers rapid ultrasound imaging.
- Existing methods struggle with heterogeneous tissues, causing artifacts like noise reverberation.
Purpose of the Study:
- Introduce Reverse Time Migration (RTM) for ultrasound plane-wave imaging.
- Address limitations of homogeneous medium assumptions in current techniques.
- Improve image quality and accuracy in complex biological tissues.
Main Methods:
- Implemented Reverse Time Migration (RTM) for plane-wave ultrasound imaging.
- Combined RTM with a novel speed of sound estimation method for layered media.
- Validated through simulations and in vitro experiments with phantoms and porcine tissues.
Main Results:
- RTM significantly reduced side and grating lobes (approx. 30 dB) in homogeneous media.
- Contrast-to-noise ratio (CNR) improved by 20% compared to conventional DAS beamforming.
- RTM achieved comparable resolution and CNR with fewer compounding angles than DAS.
- Accurate depth imaging and layer interface visualization in heterogeneous media were demonstrated.
Conclusions:
- RTM effectively overcomes limitations of homogeneous medium assumptions in ultrasound imaging.
- The proposed method optimizes velocity estimation and compensates for velocity differences in complex tissues.
- RTM provides more reliable and artifact-free ultrasound imaging results, especially in biological samples.
