Point spread function modeling for coherent plane-wave compounding ultrasound imaging

Bowen Zhou; Songde Liu; Chao Tian

doi:10.1117/12.3048479

5 December 2024 Point spread function modeling for coherent plane-wave compounding ultrasound imaging

Bowen Zhou, Songde Liu, Chao Tian

Author Affiliations +

Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 134181L (2024) https://doi.org/10.1117/12.3048479
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China

Abstract

Spatial resolution is a critical measure of the imaging performance of ultrasound imaging systems and is determined by various system factors. So far, no comprehensive studies have been reported to elucidate the impact of system factors on spatial resolution, which is generally defined as the Full Width at Half Maximum (FWHM) of the Point Spread Function (PSF). This work aims to model the PSF of ultrasound imaging systems based on a linear transducer array and a Coherent Plane-Wave Compounding (CPWC) method and study how pulse-echo sequences, transducer parameters, and beamforming algorithms impact PSF. The Verasonics simulator and UltraSound ToolBox are used in numerical simulations for ultrasound signal generation and image reconstruction, respectively. Experiments are conducted to verify simulation results. Numerical and experimental results show that the value of axial resolution is negatively correlated with the center frequency of the ultrasonic transducer; the value of lateral resolution is positively correlated with the number of transmitted plane waves of the CPWC method and the element width of the ultrasonic transducer and is negatively correlated with the maximum steering angle of the CPWC method and the aperture size and center frequency of the ultrasonic transducer. Different beamforming algorithms show varying effects on spatial resolution and image quality. This work is expected to help predict and interpret the quality of ultrasound images produced by practical ultrasound imaging systems and is beneficial for the design and development of ultrasonic transducers, pulse-echo sequences, and beamforming algorithms for enhanced spatial resolution.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Bowen Zhou, Songde Liu, and Chao Tian "Point spread function modeling for coherent plane-wave compounding ultrasound imaging", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 134181L (5 December 2024); https://doi.org/10.1117/12.3048479

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KEYWORDS

Spatial filtering

Spatial resolution

Ultrasonography

Ultrasound transducers

Point spread functions

Plane waves

Imaging systems

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