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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林達德(Ta-Te Lin) | |
| dc.contributor.author | Tung-Chang Wu | en |
| dc.contributor.author | 吳東璋 | zh_TW |
| dc.date.accessioned | 2021-05-20T21:24:55Z | - |
| dc.date.available | 2010-08-20 | |
| dc.date.available | 2021-05-20T21:24:55Z | - |
| dc.date.copyright | 2010-08-20 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-08-19 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10379 | - |
| dc.description.abstract | 金花石蒜為台灣的原生球根花卉，是台灣主要的出口花卉之一。為了解其鱗莖生長過程與性質常需透過破壞性實驗進行研究，本研究將兩種不同模式之非破壞性影像，核磁共振影像與電腦斷層掃描影像整合，開發一套適用於金花石蒜鱗莖之影像對位與融合演算法，達到連續觀察同一鱗莖成長過程之目的。對於核磁共振影像，使用7T Bruker Biospec 70/30 USR小系統核磁共振儀，以 MSME (Multi-slice-multi-echo)掃描序列，利用不同的重複時間與迴訊時間掃描參數，尋找最佳成像參數。而電腦斷層掃描儀則使用GE eXplore Vista PET/CT，以不同的電壓、電流與發射次數，尋找最佳金花石蒜鱗莖組織對比影像。於影像對位與融合演算法中，將電腦斷層影像與核磁共振影像分別視為參考影像與測試影像，在影像前處理時，利用Hotelling轉換重新定位兩影像，再使用剛性轉換函式，依面積樣板的匹配指標，輸出最佳的轉換函數參數，將兩異質影像融合為棋盤式影像，其中匹配指標達87.4%。在41張棋盤式融合影像中，有36張邊緣完全接合。而對於金花石蒜鱗莖內部形態，在五月休眠期時，即可明顯區分葉芽或花芽，並發現當溫度由28℃下降至23℃左右，花芽會快速成長並抽苔。本研究中並利用核磁共振影像當中的T2值與電腦斷層掃描的CT值探討金花石蒜鱗莖內部水分變化情形，實驗結果顯示金花石蒜鱗莖乾燥過程中，T2值與CT值皆會下降。 | zh_TW |
| dc.description.abstract | Lycoris aurea Herb., one of Taiwan’s major export flowers, is a flower bulb native to Taiwan. The invasive experiments usually used to understand the growth progress and properties of the bulbs. In this study, the images from the two non-invasive techniques, X-ray computed tomography (CT) and magnetic resonance imaging (MRI) had been integrated to develop an image registration and fusion algorithm, which is applied to observe the continuous changes of the same Lycoris aurea Herb. bulb. In MRI experiments, parameters such as repetition time (TR), echo time (TE) were adjusted by using a standard MSME (Multi-slice-multi-echo) spin-echo sequence in the 7T Bruker Biospec 70/30 to acquire high quality MR images with high contrast. On the other hand, the CT scanner was performed in GE eXplore Vista PET/CT, and parameters such as voltages, current, and shots of the X-ray source were adjusted to obtain the CT images with good tissue contrast of Lycoris aurea Herb. bulb. In image registration and fusion algorithm, CT images and MR images was regarded as reference image and test image, respectively. In image preprocessing, Hotelling transform was employed to realign the two images, and then rigid transformation was used to output the best parameters of transform function according to the matching index of area template. Finally, the two images were fused to the checkerboard rendered image. The matching index up to 87.4% and 36 images were fully matched in 41 block fusion images. For the morphological structure of Lycoris aurea Herb. bulbs, the difference between the flower and leaves buds were classified obviously in dormancy status in May. In addition, the flower buds grew quickly when the temperature decrease from 28℃ to 23℃. The moisture content change of interior Lycoris aurea Herb. bulb was evaluated by the T2 value and CT number. The results showed that both T2 value and CT number decreased during the drying process of Lycoris aurea Herb. bulb. | en |
| dc.description.provenance | Made available in DSpace on 2021-05-20T21:24:55Z (GMT). No. of bitstreams: 1 ntu-99-R97631010-1.pdf: 10413704 bytes, checksum: 2d68d60aecd6e0c1bc216b0f43430d6c (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | 誌謝............................................i
摘要...........................................ii Abstract......................................iii 目錄............................................v 圖目錄........................................vii 表目錄..........................................x 第一章 緒論....................................1 1.1 前言....................................1 1.2 研究目的................................2 第二章 文獻探討................................4 2.1 影像對位與融合..........................4 2.1.1 依據特徵擷取與匹配分類之影像對位方法....5 2.1.2 依據轉換函式分類之影像對位方法..........7 2.2 核磁共振原理與應用......................9 2.2.1 核磁共振成像簡介........................9 2.2.2 球根花卉應用核磁共振成像之研究.........10 2.3 電腦斷層影像原理與應用.................13 2.3.1 電腦斷層影像簡介.......................13 2.3.2 電腦斷層掃描之應用.....................15 2.4 金花石蒜...............................17 2.4.1 形態特徵...............................18 2.4.2 生長週期與繁殖方式.....................19 2.4.3 栽培環境...............................20 第三章 材料與方法.............................23 3.1 金花石蒜鱗莖來源與切面方向定義.........23 3.2 核磁共振影像實驗.......................25 3.2.1 核磁共振成像實驗流程與儀器.............25 3.2.2 掃描序列...............................28 3.2.3 核磁共振影像顯像法.....................29 3.2.4 影像品質分析...........................32 3.2.5 核磁共振影像量化方法...................32 3.3 電腦斷層掃描實驗.......................34 3.3.1 電腦斷層掃描實驗流程與儀器.............34 3.3.2 掃描參數設定...........................34 3.3.3 影像擷取與轉換方式.....................37 3.4 影像對位與融合.........................40 3.4.1 影像前處理 (Image preprocessing).......41 3.4.2 樣板擷取 (template extraction).........44 3.4.3 轉換函式 (transformation function)與樣板匹配 (template matching).........47 3.4.4 影像融合 (image fusion)................49 第四章 結果與討論.............................51 4.1 金花石蒜鱗莖內部核磁共振影像...........51 4.1.1 核磁共振影像品質分析...................51 4.1.2 核磁共振影像顯示.......................58 4.2 金花石蒜鱗莖內部電腦斷層掃瞄影像.......61 4.2.1 電腦斷層影像轉換與顯示.................61 4.2.2 電腦斷層掃描影像的切面校正.............64 4.2.3 電腦斷層掃描影像分析軟體...............64 4.3 影像對位與融合.........................66 4.3.1 影像對位...............................67 4.3.2 影像融合...............................71 4.3.3 影像對位與融合分析軟體.................71 4.4 金花石蒜鱗莖...........................78 4.4.1 鱗莖內部結構...........................78 4.4.2 花芽成長趨勢...........................80 4.4.3 金花石蒜鱗莖葉芽乾燥實驗...............85 第五章 結論與建議.............................96 5.1 結論...................................96 5.2 建議...................................97 參考文獻.......................................98 | |
| dc.language.iso | zh-TW | |
| dc.title | 多模式影像對位與融合技術之研究-以金花石蒜鱗莖影像為例 | zh_TW |
| dc.title | A Study of Multimodal Image Registration and Fusion:Images of Lycoris aurea Herb. Bulbs | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 張祖亮(Tsu-Liang Chang),周呈霙(Cheng-Ying Chou) | |
| dc.subject.keyword | 影像對位,影像融合,核磁共振影像,電腦斷層掃描,植物形態, | zh_TW |
| dc.subject.keyword | image registration,image fusion,magnetic resonance imaging,computed tomography,plant morphology, | en |
| dc.relation.page | 103 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2010-08-20 | |
| dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
| dc.contributor.author-dept | 生物產業機電工程學研究所 | zh_TW |
| 顯示於系所單位： | 生物機電工程學系 | |
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