English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/8989
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

On the geometrical design of segmented annular arrays

Autor Martínez-graullera, Oscar ; Godoy, Gregorio; Parrilla Romero, Montserrat; Ibáñez Rodríguez, Alberto; Gómez-Ullate Alvear, Luis
Palabras clave 2D arrays
ultrasonic imaging
SA array
GEUS
Fecha de publicación 4-dic-2008
ResumenSegmented annular arrays (SAA) can be a good option to generate 3-D ultrasonic images. Design this kind of aperture involves a variety of geometrical parameters that are decisive for the quality of the image. For instance, it is possible to use regular or non-regular SAA configurations in which the number of annuli and the elements per annulus can be varied. The ob jective of this work is to analyze these configurations in order to define the most important design parameters. In this sense, our study is centered in several points: the alignment between rings, the array size and the element aspect ratio. The evaluation of these parameters is focused in obtaining the best trade-off between the number of elements and the image quality. The arrays under analysis are equivalent in the sense that their size, number of active elements and active areas are similar and they emit the same ultrasonic pulse. In order to achieve a clear analysis of the grating lobes, the array factor approach, which considers the array formed by vibrating points, is applied. Also a more accurate analysis, based on the computation of the spatial impulse response approach, is made to reinforce our conclusions in both excitation modes, continuous wave and wide band.
Descripción Inter-noise 05 Rio de Janeiro 07-10 August 2005
URI http://hdl.handle.net/10261/8989
Aparece en las colecciones: (IAI) Comunicaciones congresos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
doc_1842.pdf563,99 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.