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Estimation of Flexible Ultrasound Array Shape Using Phase Coherence

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Název: Estimation of Flexible Ultrasound Array Shape Using Phase Coherence
Autoři: Ingram, Marcus, D'hooge, Jan
Zdroj: IEEE Transactions on Biomedical Engineering. 72:1645-1654
Informace o vydavateli: Institute of Electrical and Electronics Engineers (IEEE), 2025.
Rok vydání: 2025
Témata: Technology, Transducers, Biomedical Engineering, Scattering, Engineering, 0903 Biomedical Engineering, Apertures, Beamforming, Phased arrays, Image Processing, Computer-Assisted, 0801 Artificial Intelligence and Image Processing, Computer Simulation, Engineering, Biomedical, Arrays, Ultrasonography, 4003 Biomedical engineering, Science & Technology, Ultrasonic imaging, Phantoms, Imaging, Shape, Signal Processing, Computer-Assisted, 0906 Electrical and Electronic Engineering, 4603 Computer vision and multimedia computation, 4009 Electronics, sensors and digital hardware, flexible and conformable ultrasound arrays, shape estimation, Coherence, Biomedical engineering, Estimation, Algorithms
Popis: An algorithm to estimate the shape of a flexible ultrasound array transducer from backscattered ultrasound signals is presented. The algorithm exploits the phase variation across the receive channels to compute an array shape focusing criterion related to the array shape. This metric quantifies the phase variation at a set spatial positions and the correct array shape is identified by at the maximum of this metric. Its practical implementation is presented in the context of an overall shape estimation workflow using both simulated and experimental data. Using a 128-element, 2.5 MHz centre frequency flexible array transducer the channel data of a tissuemimicking phantom were recorded. The beam response was calibrated with respect to a known array shape facilitating quick and accurate shape estimation from these data. The algorithm was demonstrated to accurately predict the array shape corresponding to a root mean square error of the estimated element locations within 0.18λ and 0.4λ using simulated and experimental data respectively. This was performed using data recorded from a single transmit event and in a calculation time of approximately 300 ms.
Druh dokumentu: Article
ISSN: 1558-2531
0018-9294
DOI: 10.1109/tbme.2024.3516875
Přístupová URL adresa: https://pubmed.ncbi.nlm.nih.gov/40030517
Rights: IEEE Copyright
Přístupové číslo: edsair.doi.dedup.....8eae042465da5ad7719731551ea6981e
Databáze: OpenAIRE
Popis
Abstrakt:An algorithm to estimate the shape of a flexible ultrasound array transducer from backscattered ultrasound signals is presented. The algorithm exploits the phase variation across the receive channels to compute an array shape focusing criterion related to the array shape. This metric quantifies the phase variation at a set spatial positions and the correct array shape is identified by at the maximum of this metric. Its practical implementation is presented in the context of an overall shape estimation workflow using both simulated and experimental data. Using a 128-element, 2.5 MHz centre frequency flexible array transducer the channel data of a tissuemimicking phantom were recorded. The beam response was calibrated with respect to a known array shape facilitating quick and accurate shape estimation from these data. The algorithm was demonstrated to accurately predict the array shape corresponding to a root mean square error of the estimated element locations within 0.18λ and 0.4λ using simulated and experimental data respectively. This was performed using data recorded from a single transmit event and in a calculation time of approximately 300 ms.
ISSN:15582531
00189294
DOI:10.1109/tbme.2024.3516875