Row-Column-Based Coherence Imaging Using a 2-D Array Transducer: A Row-Based Implementation

Area of Science:

• Medical Imaging
• Ultrasound Technology
• Biomedical Engineering

Background:

• Cardiac ultrasound (echocardiography) images are often degraded by reverberations, reducing diagnostic accuracy.
• This degradation can necessitate additional, costly, or invasive imaging procedures.
• Current coherence-based beamforming methods struggle with partially received incoherent reverberations, especially with 1-D array transducers.

Purpose of the Study:

• To propose and evaluate an extended coherence imaging method for 2-D array transducers.
• To improve image quality and diagnostic value in echocardiography by suppressing reverberations.
• To enhance the detection probability of cardiac structures.

Main Methods:

• Developed an extended coherence imaging method tailored for 2-D array transducers.
• Implemented a row-based approach for the extended coherence imaging technique.
• Validated the method using two in vitro and four in vivo echocardiographic datasets.

Main Results:

• The proposed method demonstrated improved lateral resolution compared to conventional coherence imaging.
• Achieved up to a 28% increase in generalized contrast-to-noise ratio (gCNR).
• The improvements were particularly notable when incoherent reverberations were partially received in the elevation direction.

Conclusions:

• The extended coherence imaging method effectively enhances ultrasound image quality in echocardiography.
• This advancement offers a potential non-invasive solution to reduce the need for more complex imaging modalities.
• The technique shows promise for improving diagnostic accuracy and patient outcomes in cardiac imaging.