Design of Ultrasonic Synthetic Aperture Imaging Systems Based on a Non-Grid 2D Sparse Array

Sensors

Júlio Cesar Eduardo de Souza¹  Ricardo Tokio Higuti¹  Óscar Martínez-Graullera²  Montserrat Parrilla Romero² 

[1] Faculdade de Engenharia, Campus Ilha Solteira, Universidade Estadual Paulista (UNESP), Avenida Brasil, 56, Ilha Solteira 15385-000, SP, Brazil;Instituto de Tecnologías Físicas y de la Información (ITEFI-CSIC), C/Serrano 144, 28006 Madrid, Spain;

关键词: sparse array;    synthetic aperture imaging;    ultrasonic imaging;   

DOI  :  10.3390/s21238001

来源: DOAJ

【 摘 要 】

This work provides a guide to design ultrasonic synthetic aperture systems for non-grid two-dimensional sparse arrays such as spirals or annular segmented arrays. It presents an algorithm that identifies which elements have a more significant impact on the beampattern characteristics and uses this information to reduce the number of signals, the number of emitters and the number of parallel receiver channels involved in the beamforming process. Consequently, we can optimise the 3D synthetic aperture ultrasonic imaging system for a specific sparse array, reducing the computational cost, the hardware requirements and the system complexity. Simulations using a Fermat spiral array and experimental data based on an annular segmented array with 64 elements are used to assess this algorithm.

【 授权许可】

Unknown