Diffraction tomographic imaging with a circular array

Author

Naidu, Prabhakar S. ; Vasuki, A. ; Satyamurthy, P. ; Anand, L.

Author_Institution

Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India

Volume

42

Issue

4

fYear

1995

fDate

7/1/1995 12:00:00 AM

Firstpage

787

Lastpage

789

Abstract

A new approach of imaging an object profile from the scattered wavefield, which is measured using a large (far field approximation) circular array of sensors surrounding the object, is described. It is shown that the measured field is itself proportional to the Fourier transform of the object. Consequently, as compared to the existing methods, such as back propagation method for a linear array, our method overcomes the well known effects of the finite window in numerical evaluation of the Fourier transform of the measured scattered field. This results into improved reconstruction.<>

Keywords

Fourier transforms; acoustic tomography; image reconstruction; ultrasonic diffraction; ultrasonic imaging; Fourier transform; circular array; diffraction tomographic imaging; far field approximation; image reconstruction; object profile; scattered wavefield; Acoustic diffraction; Acoustic scattering; Fourier transforms; Microwave imaging; Sea measurements; Sensor arrays; Shape measurement; Tomography; Ultrasonic imaging; Ultrasonic variables measurement;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.393123

Filename

393123