| Autor: |
Harput, S, Christensen-Jeffries, K, Ramalli, A, Brown, J, Zhu, J, Zhang, G, Leow, CH, Toulemonde, M, Boni, E, Tortoli, P, Eckersley, RJ, Dunsby, C, Tang, M-X |
| Přispěvatelé: |
Engineering & Physical Science Research Council (EPSRC) |
| Rok vydání: |
2019 |
| Předmět: |
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| Popis: |
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 super-resolution 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 in 3 milliseconds at a pulse repetition frequency of 3000 Hz. To allow microbubbles sufficient time to move between consequent compounded volumetric frames, a 7-millisecond delay was introduced after each volume acquisition. This reduced the effective volume acquisition speed to 100 Hz and the total acquired data size by 3.3-fold. Localization-based 3-D super-resolution images of two touching sub-wavelength tubes were generated from 6000 volumes acquired in 60 seconds. In conclusion, this work demonstrates the feasibility of 3D super-resolution imaging and super-resolved velocity mapping using a customized 2D sparse array transducer. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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