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Updated: Jul 28, 2026
08:08
Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System
Published on: March 6, 2019
Ultrasound phased arrays for prostate treatment
J S Tan1, L A Frizzell, N Sanghvi
1Department of Electrical and Computer Engineering, University of Illinois, Urbana 61801, USA.
The Journal of the Acoustical Society of America
|June 27, 2001
Summary
Array geometry significantly impacts ultrasound phased array steering. Spherical arrays excel along-axis, while cylindrical arrays are better for lateral steering, with curved designs offering a compromise.
Area of Science:
- Medical Imaging
- Acoustic Engineering
- Biomedical Devices
Background:
- Ultrasound phased arrays are crucial for medical imaging and therapy.
- Optimizing array geometry is essential for maximizing performance within anatomical constraints.
- Steering capabilities are critical for precise focusing in ultrasound applications.
Purpose of the Study:
- To theoretically examine the effect of array geometry on ultrasound phased array steering performance.
- To evaluate and compare the steering effectiveness of spherical and cylindrical array configurations.
- To identify optimal array designs for maximizing performance under specific anatomical limitations.
Main Methods:
- Computer simulations were used to model pressure fields for various steering extremes.
- Arrays with spherical (annular and linear elements) and cylindrical (flat and curved) geometries were analyzed.
- Performance was quantified using a parameter G, representing the ratio of desired focus intensity to unwanted lobe intensity.
Main Results:
- Truncated spherical annular arrays showed excellent performance (G>5.7) for axial steering.
- Spherical linear arrays performed well axially (G>7) but poorly laterally (G<1).
- Cylindrical arrays demonstrated better lateral steering (G>4) but poorer axial steering (G≈4).
Conclusions:
- Array geometry critically influences ultrasound phased array steering capabilities.
- Spherical arrays are optimal for axial steering, while cylindrical arrays are better for lateral steering.
- Curved cylindrical arrays offer a balanced performance, improving both axial and lateral steering compared to their non-curved counterparts.
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