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研究生:林建志
研究生(外文):Chien-Chih Lin
論文名稱:牙科數位X光立體影像的處理與效益之比較評估
論文名稱(外文):The stereoscopic processing and performance evaluation for digital dental radiography
指導教授:吳先晃
指導教授(外文):Hsien-Huang Wu
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:通訊工程研究所碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:75
中文關鍵詞:立體影像數位放射攝影牙科立體放射照相術影像扭正
外文關鍵詞:Image processingDigital radiographyImage rectificationStereoscopic imagingDental stereoradiography
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一般口腔檢查只能看到牙齒表面狀態、淺層的牙周與牙齦的健康情況,但是對於牙根病變、齒槽神經發炎或內部齲齒…等,是需要使用X光透視照相才能夠發現病變。由於醫學科技的發展,具許多優點的數位化X光機,已漸漸取代傳統膠片,不僅能讓影像資料易於管理,必要時更可對影像做適當的處理以便於觀察診斷病情。隨著立體影像的技術演進,在醫學領域的應用上,已經有不少研究發現立體視覺可提供許多有用的診療資訊,首先我們需對立體相關原理進行了解,並且比較目前市面上常用的立體觀看裝置,再設計出更合適的立體觀看系統。
口腔立體影像曾被用來作診療,以減少診斷上的困難度及增加精確性。但由於需要兩張影像,因此有增加放射線的疑慮而漸式微。但近年來由於數位X光的放射劑量大幅降低,預期此數位化的風潮,將會提高立體影像使用的頻率。研究發現,對於18位觀察者評估30組放射線影像例子,使用生物醫學統計學學生配對t檢驗(student''s two-tailed paired t test)進行顯著性檢驗分析,由檢定結果可以知道立體觀看模式具有統計顯著性t=4.077,因此立體影像可以取代頰側物體法則使得診斷更加容易。
立體影像基本上至少需要兩張以上的影像才能形成,並且兩張影像必需具有共同的水平面,實驗過程發現,醫師在拍攝兩張X光時,X光機並不一定只做水平的移動,並且病人也可能會有些微的移動,此時X光影像對在立體顯示器上合成的立體影像效果將會受到影響,因此我們將影像做扭正處理,使得兩張影像有較佳的立體匹配,在立體顯示架構上產生較佳的立體效果。
Check the health condition that can only see tooth surface state, simple tooth week of layer and gums with general oral cavity, but to the neural inflammation of the pathological change of root of the tooth, tooth''s socket or inside decayed tooth need to use the X-rays and have an X-rayed to take pictures and can just find the pathological change. Because of the development of medical science and technology, have the digitisation X-ray machines of a lot of advantages, already replaced traditional film gradually, has not merely made the image materials easy to manage, can do proper treatment to the image in order to observe the condition of diagnosing in case of necessity. With the technological gradual progress of the three-dimensional image, on medical application of field, have to discover the three-dimensional vision can offer a lot of useful message of making a diagnosis already, we at first is it is it understand to go on to three-dimensional relevant principle to need, and a commonly used one three-dimensional to watch the device on the market at present, and then design more suitable watching the system three-dimensionally. The three-dimensional image of oral cavity was once used for making a diagnosis, diagnosed difficulty degree had and increased the accuracy by reducing. But because need two images, so there is doubt of increase radioactive rays and decline gradually. But the radiation dosage to the digit X-rays of cause in recent years is reduced by a wide margin, it is expected the agitation of this digitisation, will improve the frequency that the three-dimensional image will be used. Discover, assess 30 groups of radioactive rays image examples to 18 observers, t is examined (student''s two-tailed paired t test) to use biomedical statistics students and mate Carry on dominance inspection and analyse, can know from the result of assaying that watch the way counting dominance t three-dimensionally = 4.077, so the three-dimensional image can replace the cheek side object rule makes diagnosis easier. The three-dimensional image needs more than two images to take shape at least basically, and two images must have common horizontal planes, the experiment course is found, doctor while shooting two pieces of X-rays, X-ray machine might not only make the movement of competence, and patients may have some little movements, the image of the X-rays will be influenced the three-dimensional image result that is formated on the three-dimensional display at this moment, so we sprain the image, make two images have better matching three-dimensionally, produce better three-dimensional result on the three-dimensional structure of showing.
著作權歸屬與行使同意書 iii
論文口試委員會審定書 iv
摘要 v
ABSTRACT vi
誌謝 viii
第1章 緒論 1
1.1 研究背景 1
1.2 相關文獻與研究動機 2
1.3 研究目的 3
1.4 研究大綱 3
第2章 立體顯示器之發展 5
2.1 立體顯示概念 5
2.2 立體視覺原理 5
2.3 立體顯示器的發展歷程 6
2.4 立體顯示器的分類 6
2.5 立體顯示器的現在與未來 9
第3章 數位雙螢幕立體顯示裝置 10
3.1 立體顯示裝置之鏡片推導 10
3.2 立體影像顯示設備的介紹 13
3.3 立體顯示架構的製作 15
3.4 立體顯示架構的使用方式 16
第4章 數位口腔立體影像 18
4.1 牙齒模型的製造過程 18
4.2 X光照射技術 20
4.2.1 頰側物體法則 22
4.2.2 放射線立體影像之研究 26
4.2.3 適用立體口腔病例 28
4.2.4 下顎管(mandibular canal) 30
4.3 紅藍影像的產生 33
4.4 牙齒影像對的介紹 34
4.5 牙科數位X光立體影像的比較評估 35
第5章 數位X光根尖片的影像扭正 39
5.1 牙齒X光影像扭正的必要性 39
5.2 強化特徵點 39
5.3 簡易的不變形方法 40
5.4 剪割轉換 40
5.5 影像延伸 40
5.6 扭正方法的比較 41
5.7 扭正的實驗結果 41
第6章 結論及未來方向 58
參考資料 59
附錄一 t-table 61
作者簡介 62
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