Digital image focussing in the near field of a sampled acoustic aperture

F. Duck, S. Johnson, J. Greenleaf, W. Samayoa

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A study has been carried out to investigate digital techniques which can be used to form fully focussed acoustic images. An algebraic approach was used rather than a Fourier technique. Pulse-echo data was digitized from a 2.4 cm long, 32 element, 3 MHz linear array. Water bath tests have demonstrated azimuthal resolution close to being diffraction limited throughout the field of view. Good images of tissue samples in-vitro have been obtained. Consideration of image sampling requirements and symmetry properties have led to the development of an efficient processing algorithm.

Original languageEnglish (US)
Pages (from-to)83-88
Number of pages6
Issue number2
StatePublished - Mar 1977

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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