A parametric study of ultrasonic beam profiles for a linear phased array transducer

Area of Science:

• Ultrasound physics
• Acoustic engineering
• Medical imaging technology

Background:

• Linear phased array transducers are crucial for medical ultrasound imaging.
• Optimizing transducer design is essential for enhancing image quality and diagnostic accuracy.
• Understanding the relationship between design parameters and beam characteristics is vital.

Purpose of the Study:

• To develop a numerical simulation model for analyzing linear phased array transducer performance.
• To investigate the impact of various design parameters on ultrasonic beam focusing and steering.
• To provide insights for optimizing transducer design for specific applications.

Main Methods:

• A numerical simulation model based on Huygen's superposition principle was developed.
• The linear phased array was modeled as discrete 2D point sources.
• Simplified transient ultrasonic waves (cosine function with Hanning window) were used.

Main Results:

• The study systematically analyzed the effects of element number, interelement spacing, steering angle, focal length, and frequency bandwidth.
• Simulations demonstrated how these parameters influence beam directivity and the ultrasonic pressure field.
• The model provides a framework for predicting beam characteristics based on design choices.

Conclusions:

• Design parameters significantly influence the beam focusing and steering capabilities of linear phased array transducers.
• The developed simulation model offers a valuable tool for transducer design optimization.
• This research contributes to the advancement of ultrasound transducer technology for improved performance.