Improving ultrasound images with elevational angular compounding based on acoustic refraction.

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Acoustics

Background:

• Ultrasound imaging suffers from speckle noise, degrading image quality and diagnostic accuracy.
• Current Elevational Angular Compounding (EAC) methods require bulky and expensive hardware, limiting their widespread adoption.
• There is a need for cost-effective and compact solutions to reduce speckle in ultrasound.

Purpose of the Study:

• To introduce a novel, low-cost EAC technique called REACT (Refraction-based Elevational Angular Compounding).
• To demonstrate REACT's effectiveness in reducing speckle noise using a 1D transducer array and a translating acoustic lens.
• To evaluate the impact of elevational angular width on speckle reduction for optimizing EAC application.

Main Methods:

• Developed a novel EAC technique (REACT) utilizing a translating cylindrical acoustic lens with a 1D transducer array.
• Steered the ultrasound beam in the elevational direction using acoustic refraction, avoiding mechanical rotation.
• Investigated phantoms and excised tissue samples to assess speckle reduction and signal-to-noise improvements.

Main Results:

• REACT demonstrated superior speckle noise suppression compared to existing EAC methods.
• Achieved up to a two-fold improvement in signal-to-noise and contrast-to-noise ratios.
• Identified optimal elevational angular widths for effective speckle reduction using EAC.

Conclusions:

• REACT offers a cost-effective and compact alternative for speckle reduction in ultrasound imaging.
• The use of acoustic refractive elements presents a promising avenue for enhancing medical ultrasound devices.
• This technique has the potential to improve diagnostic precision in various ultrasound applications.