Key result
Computational ultrasound using 12 transceivers and an aberration mask enables quality carotid artery monitoring.
Why the study?
Ultrasonography for continuous carotid artery monitoring typically requires complex, expensive transducers, particularly for 3-D imaging.
A simplified computational ultrasound imaging setup using 12 transceivers and an aberration mask can achieve adequate 2-D carotid artery imaging, suggesting feasibility for low-cost, operator-independent monitoring devices.
Answers are grounded in this paper and cite their sources.
May support low-cost carotid monitoring devices; leaves open human validation before clinical use.
Ultrasonography could allow operator-independent examination and continuous monitoring of the carotid artery (CA) but normally requires complex and expensive transducers, especially for 3-D. By employing computational ultrasound imaging (cUSi), using an aberration mask and model-based reconstruction, a monitoring device could be constructed with a more affordable simple transducer design comprising only a few elements. We aim to apply the cUSi concept to create a CA monitoring system. The system's possible configurations for the 2-D imaging case were explored using a linear array setup emulating a cUSi device in silico, followed by in vitro testing and in vivo CA imaging. Our study shows enhanced reconstruction performance with the use of an aberrating mask, improved lateral resolution through proper choice of the mask delay variation, and more accurate reconstructions using least-squares with QR (LSQR) decomposition compared to matched filtering (MF). Together, these advancements enable B-mode reconstruction and power Doppler imaging (PDI) of the CA with sufficient quality for monitoring using a configuration of 12 transceivers coupled with a random aberration mask with a maximum delay variation of four wave periods (WPs).
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Hu et al. (2025) studied Carotid artery imaging (n=1). Computational ultrasound imaging (cUSi) with 12 transceivers and an encoding mask vs. Standard 128-element linear array or unmasked transceivers was evaluated on Image reconstruction quality (Point Spread Function and Contrast Ratio). A computational ultrasound imaging configuration using 12 transceivers and a random aberration mask enabled 2-D B-mode and power Doppler imaging of the carotid artery with sufficient quality for monitoring.
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