Low-Frequency Scattering Component for Quantitative Circular-Scanning Ultrasonic Diffraction Tomography
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概要
- 論文の詳細を見る
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.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 2001-05-30
著者
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Miyashita Toyokatsu
Department Of Electrical Engineering Kyoto Institute Of Technology
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Miyashita Toyokatsu
Department of Electronics and Informatics, Ryukoku University, 1-5 Yokotani, Seta Ohe-cho, Ohtsu 520-2194, Japan
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