High frame rate 3-D ultrasound imaging technology combined with super-resolution processing method can visualize 3-D microvascular structures by overcoming the diffraction limited resolution in every spatial direction. However, 3-D superresolution ultrasound imaging using a full 2-D array requires a system with large number of independent channels, the design of which might be impractical due to the high cost, complexity, and volume of data produced. In this study, a 2-D sparse array was designed and fabricated with 512 elements chosen from a density-tapered 2-D spiral layout. High frame rate volumetric imaging was performed using two synchronized ULA-OP 256 research scanners. Volumetric images were constructed by coherently compounding 9-angle plane waves acquired at a pulse repetition frequency of 4500 Hz. Localization-based 3-D super-resolution images of two touching sub-wavelength tubes were generated from 6000 volumes acquired in 12 seconds. In conclusion, this work demonstrates the feasibility of 3-D super-resolution imaging and super-resolved velocity mapping using a customized 2-D sparse array transducer.
3-D Super-Resolution Ultrasound Imaging with a 2-D Sparse Array / Harput, Sevan; Christensen-Jeffries, Kirsten; Ramalli, Alessandro; Brown, Jemma; Zhu, Jiaqi; Zhang, Ge; Leow, Chee Hau; Toulemonde, Matthieu; Boni, Enrico; Tortoli, Piero; Eckersley, Robert J.; Dunsby, Chris; Tang, Meng-Xing. - In: IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL. - ISSN 0885-3010. - ELETTRONICO. - 67:(2020), pp. 269-277. [10.1109/TUFFC.2019.2943646]
3-D Super-Resolution Ultrasound Imaging with a 2-D Sparse Array
Ramalli, AlessandroMembro del Collaboration Group
;Toulemonde, MatthieuMembro del Collaboration Group
;Boni, EnricoMembro del Collaboration Group
;Tortoli, PieroMembro del Collaboration Group
;
2020
Abstract
High frame rate 3-D ultrasound imaging technology combined with super-resolution processing method can visualize 3-D microvascular structures by overcoming the diffraction limited resolution in every spatial direction. However, 3-D superresolution ultrasound imaging using a full 2-D array requires a system with large number of independent channels, the design of which might be impractical due to the high cost, complexity, and volume of data produced. In this study, a 2-D sparse array was designed and fabricated with 512 elements chosen from a density-tapered 2-D spiral layout. High frame rate volumetric imaging was performed using two synchronized ULA-OP 256 research scanners. Volumetric images were constructed by coherently compounding 9-angle plane waves acquired at a pulse repetition frequency of 4500 Hz. Localization-based 3-D super-resolution images of two touching sub-wavelength tubes were generated from 6000 volumes acquired in 12 seconds. In conclusion, this work demonstrates the feasibility of 3-D super-resolution imaging and super-resolved velocity mapping using a customized 2-D sparse array transducer.
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