Low-Frequency Scattering Component for Quantitative Circular-Scanning Ultrasonic Diffraction Tomography

We present a theory of circular-scanning ultrasonic diffraction tomography along with simple preliminary experimental results. Images of cross-sectional structures of objects achieved by diffraction tomography have a high resolution, which is finer than a wavelength of the probing wave, in the prese...

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Bibliographic Details
Published in:JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP 2001-05, Vol.40 (5S), p.3926-3930
Main Author: Toyokatsu Miyashita, Toyokatsu Miyashita
Format: Article
Language:English
Subjects:
Optical resolving power
Scanning
Ultrasonic diffraction
Ultrasonic imaging
Ultrasonic propagation
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Summary:We present a theory of circular-scanning ultrasonic diffraction tomography along with simple preliminary experimental results. Images of cross-sectional structures of objects achieved by diffraction tomography have a high resolution, which is finer than a wavelength of the probing wave, in the presence of diffraction, reflection, and refraction phenomena. We investigate the spatial resolution and quantitative reconstruction of the object function, focusing on the role of the low-frequency component of the scattered wave, and show a simple method of extrapolation to determine the lacking low-frequency component. Additionally, we present numerical investigations on the quantitative accuracy of the reconstruction of a complex object function, introducing new numerical phantoms for the circular scanning diffraction tomography like Shepp and Logan's phantoms which are utilized in the numerical investigations of X-ray CT and MRI.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.40.3926