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Título

A New Beamforming Process Based on the Phase Dispersion Analysis

AutorMartínez-Graullera, Óscar ; Romero-Laorden, David; Martín Arguedas, Carlos J. ; Ibáñez Rodríguez, Alberto; Gómez-Ullate Alvear, Luis
Palabras claveultrasonic imaging
beamforming
SAFT
GEUS
Fecha de publicación25-ene-2012
ResumenTo improve the results of the Delay-And-Sum (DAS) beamformer a weighting factor based on a measurement of the phase dispersion of the signals in the image point under consideration has been proposed. With this objective, the spectral analysis of the phase dispersion is used here to obtain a new descriptor that can be easily computed and introduced as a ponderation factor in the beamforming process. Theoretical results show that, for a linear array of 32 elements operating in synthetic aperture technique with dynamic focussing in emission and reception (Total Focussing Method) the improvement can reach up to 24dB. In order to validate the theoretical hypothesis, experimental results obtained using a linear array of 64 elements (2,4MHz) and a CIRS 040GSE phantom also are presented.
URIhttp://hdl.handle.net/10261/44699
Aparece en las colecciones: (CAEND) Comunicaciones congresos
Revisiones relacionadas90Ver revisión de Higuti, Ricardo Tokio
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