Convolutional modeling of diffraction effects in pulse-echo ultrasound imaging.

Area of Science:

• Medical imaging
• Acoustics
• Wave propagation

Background:

• Ultrasound array transducers are crucial for medical imaging.
• Accurate modeling of ultrasound wave propagation in scattering media is complex.
• Existing models may not fully account for various physical phenomena.

Purpose of the Study:

• To develop a comprehensive model for ultrasound pulse-echo imaging.
• To accurately simulate imaging in three-dimensional, linear, weakly-scattering continuum media.
• To incorporate effects like diffraction, attenuation, and aberration.

Main Methods:

• Developed a model for pulse-echo imaging using ultrasound array transducers.
• Accounted for diffracted fields, multiple focal zones, frequency-dependent attenuation, and sound speed mismatches.
• Utilized analytic expressions for transmit and receive beams.

Main Results:

• The model accurately computes B-scan images based on medium reflectivity.
• Numerical results show favorable agreement with measured B-scan images.
• Speckle statistics from the model align with experimental data.

Conclusions:

• The presented model provides a robust framework for ultrasound imaging simulations.
• It accurately predicts image formation in complex scattering media.
• This model can aid in the interpretation and optimization of ultrasound diagnostic techniques.