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Capability of segmented annular arrays to generate 3-D ultrasonic imaging

AuthorsGómez-Ullate Alvear, Luis; Martínez-Graullera, Óscar ; Akhnak, Mostafa; Montero de Espinosa Freijo, Francisco
KeywordsTransducer arrays
Segmented annular arrays
Array geometry
3D Ultrasonic maging
Ultrasonic beams
Issue DateSep-2002
PublisherSociedad Española de Acústica
CitationForum Acusticum Sevilla 2002. Ultrasonics ; ULT-03-003-IP
AbstractThe main object of this paper is to show the influence of the array geometry on the image properties. This is made by comparing the beam generated by three 2D arrays: a squared array, a regular segmented annular array with a star distribution of elements and a segmented annular array with elements of unitary aspect ratio. The three arrays are equivalent in the sense that their size, number of active elements and active areas are similar and that they emit the same ultrasonic pulse. After analysing theoretically the main beam and grating lobes in the steering case, the paper concludes advising to use segmented annular arrays with elements of unitary aspect ratio as they produce ultrasonic beams with good properties even for an interelement spacing of 1.1λ.
Description6 pages, 5 figures.-- PACS nrs.: 43.38.Hz, 43.35, 43.35.Bc, 43.60.-- Communication presented at: Forum Acusticum Sevilla 2002 (Sevilla, Spain, 16-20 Sep 2002), comprising: 3rd European Congress on Acoustics; XXXIII Spanish Congress on Acoustics (TecniAcústica 2002); European and Japanese Symposium on Acoustics; 3rd Iberian Congress on Acoustics.-- Special issue of the journal Revista de Acústica, Vol. XXXIII, year 2002.
Appears in Collections:(IAI) Comunicaciones congresos
(IA) Comunicaciones congresos
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