The non-grid sparse array technique is a promising approach to overcome the connection difficulties of 2D matrix arrays and to partially compensate the energy loss linked to the element number reduction. Being independent from the spatial sampling conditions, this method leads to a significant improvement of the beam pattern when combined to the simulated annealing algorithm. However, in the previous version of this method, the position of the elements cannot be changed during the optimization. In order to add a further degree of freedom and thus to improve the optimization performance, we propose a new strategy in which both element position and apodization can be modified. This new approach improves the sensitivity thanks to a better distribution of the elements on the array footprint.

Optimization of Free-Moving Elements in 2D Ultrasound Sparse Arrays / B. Diarra; M. Robini; E. Roux; P. Tortoli; H. Liebgott; C. Cachard. - ELETTRONICO. - (2014), pp. 2189-2192. (Intervento presentato al convegno IEEE 2014 International Ultrasonics Symposium tenutosi a Chicago nel September 2014) [10.1109/ULTSYM.2014.0545].

Optimization of Free-Moving Elements in 2D Ultrasound Sparse Arrays

DIARRA, BAKARY;ROUX, EMMANUEL;TORTOLI, PIERO;
2014

Abstract

The non-grid sparse array technique is a promising approach to overcome the connection difficulties of 2D matrix arrays and to partially compensate the energy loss linked to the element number reduction. Being independent from the spatial sampling conditions, this method leads to a significant improvement of the beam pattern when combined to the simulated annealing algorithm. However, in the previous version of this method, the position of the elements cannot be changed during the optimization. In order to add a further degree of freedom and thus to improve the optimization performance, we propose a new strategy in which both element position and apodization can be modified. This new approach improves the sensitivity thanks to a better distribution of the elements on the array footprint.
2014
IEEE 2014 International Ultrasonics Symposium Proceedings
IEEE 2014 International Ultrasonics Symposium
Chicago
September 2014
B. Diarra; M. Robini; E. Roux; P. Tortoli; H. Liebgott; C. Cachard
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/911953
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