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Beam steering with pulsed two-dimensional transducer arrays.

D H Turnbull¹, F S Foster

¹Dept. of Med. Biophys., Toronto Univ., Ont.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1991

Summary

Developing 2-D arrays for medical imaging is complex due to numerous elements. This study investigates 2-D array focusing and steering properties, optimizing parameters like element size and spacing for better imaging.

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Area of Science:

Ultrasound transducer technology
Medical imaging physics
Array signal processing

Background:

Two-dimensional (2-D) arrays offer advanced capabilities for medical imaging.
The complexity of large element counts presents a significant challenge in 2-D array development.

Purpose of the Study:

To theoretically investigate the focusing and steering properties of pulsed 2-D arrays.
To characterize essential parameters for medical imaging, including element size, spacing, and quantity.

Main Methods:

Detailed computational methods for analyzing 2-D array behavior.
Examination of steered beam properties for wideband 2-D arrays.
Analysis of apodization and element cross-coupling effects on beam characteristics.

Main Results:

Characterization of beam properties for various sparse 2-D arrays.
Evaluation of random element distribution effects on transducer aperture.
Insights into optimizing 2-D array design for medical applications.

Conclusions:

Understanding 2-D array focusing and steering is crucial for advanced medical imaging.
Parameter optimization, including element configuration and sparse arrangements, can mitigate complexity.
This research provides a theoretical foundation for developing next-generation 2-D ultrasound transducers.