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Título

3D ultrasonic medical imaging based on segmented annular arrays

Autor Gómez-Ullate Alvear, Luis; Martínez-graullera, Oscar ; Godoy, Gregorio; Ibáñez Rodríguez, Alberto
Palabras clave ultrasonic imaging
2D arrays
vernier array
SA array
GEUS
Fecha de publicación 4-dic-2008
ResumenConventional 2D ultrasonic arrays are formed by square elements, which have a limit of λ/2 spacing. In this paper we present two apertures, which are based on segmented annular (SA) arrays that have the property of producing lower grating lobes and, consequently, that allow increasing the size of the elements. With the purpose of designing apertures of medium size (D=30λ) with a reduced number of active elements (<250), several thinned squared and segmented-annular arrays are here analyzed. A thinning technique valid for SA arrays that is a modified version of the vernier sparse method ("single vernier") is presented. The paper shows that SA arrays may produce images with similar properties than squared arrays, but with a signal intensity around 20 dB above.
Descripción Proceedings BioEng 2001
URI http://hdl.handle.net/10261/8983
ISBN 972-95465-8-4
Aparece en las colecciones: (IAI) Comunicaciones congresos
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