Incidence of element distribution on the ultrasonic field of segmented annular arrays

Segmented annular arrays are sometimes used for 3D ultrasonic imaging. However, owing to their geometrical complexity, the acoustic field generated by this type of aperture has not been adequately described. In this work, a method based on the array factor approach is used to describe the field radi...

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Bibliographic Details
Published in:Ultrasonics 2000-03, Vol.38 (1), p.176-178
Main Authors: Martı́nez, O., Ullate, L.G., Izquierdo, M.A.G., Sánchez, T.
Format: Article
Language:English
Subjects:
2D arrays
3D imaging
Acoustic signal processing
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Ultrasound
UT field
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Summary:Segmented annular arrays are sometimes used for 3D ultrasonic imaging. However, owing to their geometrical complexity, the acoustic field generated by this type of aperture has not been adequately described. In this work, a method based on the array factor approach is used to describe the field radiated by sector annular arrays. This approach allows one to analyse the influence on the field of several aperture parameters, such as the number of elements per annulus, size and spatial distribution of elements, etc. In addition, strategies to reduce grating lobes are presented.
ISSN:0041-624X
1874-9968
DOI:10.1016/S0041-624X(00)00005-6