講演名 | 2006-01-28 A Wavelet-based Multiresolution Medical Image Registration Strategy Combining Mutual Information with Spatial Information , |
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抄録(英) | Mutual information is a widely-used metric in medical image registration, which achieves good results; however it can lead to misregistration because of the absence of spatial information. In this paper, we propose a wavelet-based multiresolution medical image registration strategy combining mutual information with spatial information. In such a strategy, wavelet transform is adopted to decompose original 3D images into different resolution layers, different from the traditional Gaussian pyramid multiresolution method. In each layer, low-frequency coefficients LLL is used to compute mutual information; and high-frequency coefficients HLL, LHL and LLH are used to compute the metric of spatial information. By a linear addition, a hybrid metric is formed to combine both mutual information and spatial information. The advantage of the proposed algorithm is that the half-resolution images and the high frequency images can be obtained only in one step with the help of wavelet transform. This reduces the processing time a lot. Additionally, experiments show that the hybrid metric works better than mutual information in CT-MR registration problems. |
キーワード(和) | |
キーワード(英) | Medical Image Registration / Mutual Information / Wavelet Transform / Multiresolution |
資料番号 | MI2005-138 |
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研究会 | MI |
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開催期間 | 2006/1/21(から1日開催) |
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申込み研究会 | Medical Imaging (MI) |
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本文の言語 | ENG |
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サブタイトル(和) | |
タイトル(英) | A Wavelet-based Multiresolution Medical Image Registration Strategy Combining Mutual Information with Spatial Information |
サブタイトル(和) | |
キーワード(1)(和/英) | / Medical Image Registration |
第 1 著者 氏名(和/英) | / Rui Xu |
第 1 著者 所属(和/英) | College of Information and Science, Ristumeikan University |
発表年月日 | 2006-01-28 |
資料番号 | MI2005-138 |
巻番号(vol) | vol.105 |
号番号(no) | 580 |
ページ範囲 | pp.- |
ページ数 | 4 |
発行日 |