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研究生(外文):You-Cheng Liao
論文名稱(外文):Comparative Evaluation of Different Strategies for Registration by Maximization of Mutual Information
指導教授(外文):Chi-Hsiang Lo
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本文主要採用Dr. Chi-Hsiang Lo在The Retrospective Image Registration Evaluation (0Hhttp://www.vuse.vanderbilt.edu/~image/registration)中利用最大交互資訊所使用的三種不同定位方法作為研究樣本,試圖對這三種方法並與其他研究者所獲取的結果進行比較評估及改進,希望藉此能在影像定位領域中,提供實質上的幫助。
Today, due to the capability of the computer is powerful, the technique of processing the medical images is widely used in the clinical diagnosis and treatment. In the area of medical image registration, because only one kind of images is not enough to give us the entire information, therefore, it’s useful to fuse different images (ex: CT-MR or CT-PET). After three-dimension medical image registration, the specific position is shown in precisely for the doctor needs.

In this thesis, it’s mainly to evaluate the different brain registration strategies, aims to the speed and accuracy of registration. To compare the merit and defect, and find out the reason so we can improve it.

In this study, the samples get from the three kinds of registration strategies by Dr. Chi-Hisang Lo, as part of The Retrospective Image Registration Evaluation (1Hhttp://www.vuse.vanderbilt.edu/~image/registration), the result of comparison with other researchers as well and improvement were proposed. I hope it can offer the help for the research of medical image registration.
致謝 i
摘要 ii
Abstract iii
目錄 iv
圖目錄 vi
表目錄 vii
第一章 緒論
1.1 背景 1
1.2 目的 1
第二章 影像
2.1 影像來源 3
2.1.1 電腦斷層掃描影像CT 3
2.1.2 核磁共振影像MR 3
2.1.3 正電子放射斷層掃描影像PET 4
2.2 影像處裡 4
2.2.1 區域成長法 4
2.2.2 K-Means群集法 5
2.2.3小波轉換 7離散小波轉換 7 小波濾波器係數 8
第三章 醫學影像定位
3.1 醫學影像定位演算法 12
3.1.1對應標記演算法 12
3.1.2面定位 13
3.1.3根據像素強度定位-相似像素法 14 多重影像定位-由相同病患取得相同影像模式 15 像素相似法-應用不同影像模式熵值進行校准 16
3.2 正規化交互資訊 17
3.3 座標轉換 19
3.4最佳化演算法 22
3.4.1 Powell共軛方向法 22
3.4.2 Downhill單一法 23
第四章 評估
4.1 定位方法 25
4.1.1以二位元法最大交互資訊對CT-MR影像的定位 25
4.1.2使用非線性網格最大交互資訊對CT-MR影像的定位 26
定位方法 26
4.2數據 27
4.2.1介紹 27
4.2.2以二位元法最大交互資訊對CT-MR影像的定位 27
4.2.3使用非線性網格最大交互資訊對CT-MR影像的定位 32
定位方法 36
4.3 比較分析 45
4.3.1 中值誤差比較 45
4.3.2 最大值誤差比較 46
4.3.3 定位時間比較 47
4.3.4 探討 48
4.4 最大交互資訊法定位比較 48
4.4.1誤差值比較 48
4.4.2 結論 52
第五章 總結
5.1 結論 53
5.2 未來工作 54
參考文獻 55
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