Improvement of CT Image Degraded by Quantum Mottle Using Singularity Detection(Regular Section)
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概要
- 論文の詳細を見る
To improve the CT image degraded by radiographic noise (such as quantum mottle), we propose a method based on the wavelet transform modulus sum (WTMS). The noise and regular parts of a signal can be observed by tracing the evolution of its WTMS across scales. Our results show that most of the quantum mottle in the projections of Shepp-Logan phantom has been removed by the proposed method with the supposed cranium well preserved. The denoised CT images show good signal to noise ratio in the region of interest. We also have investigated the relation between the number of X-ray photons and the quality of images reconstructed from denoised projections. From experimental results, this method shows the possibility to reduce a patient's dose about 1/10 with the same visual quality.
- 社団法人電子情報通信学会の論文
- 2003-01-01
著者
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YOSHIDA Yasuo
Department of Applied Quantum Physics, Kyushu University
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Yang Y‐q
Department Of Electronics And Information Science Kyoto Institute Of Technology
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Yang Yi-Qiang
Department of Electronics & Information Science, Kyoto Institute of Technology
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Nakamori Nobuyuki
Department of Electronics & Information Science, Kyoto Institute of Technology
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Yoshida Y
Department Of Electrical And Electronic Engineering Faculty Of Engineering And Resource Science Akit
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Nakamori N
Department Of Electronics And Information Science Kyoto Institute Of Technology
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Nakamori Nobuyuki
Department Of Electrical Engineering Kyoto Technical University
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Yoshida Yasuo
Department Of Applied Quantum Physics Kyushu University
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Yoshida Yasuo
Department Of Applied Quantum Physics Faculty Of Engineering Kyushu University
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