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研究生:王儷螢
研究生(外文):Li-Ying Wang
論文名稱:顱顏下顎手術之術後影像預測
論文名稱(外文):Soft-Tissue Prediction and Reconstruction after Craniofacial Surgery
指導教授:萬書言萬書言引用關係
指導教授(外文):Shu-Yen Wan
學位類別:碩士
校院名稱:長庚大學
系所名稱:資訊工程研究所
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:2007
畢業學年度:95
語文別:中文
論文頁數:48
中文關鍵詞:軟組織CT影像影像的分割邊界偵測
外文關鍵詞:craniofacialsoft tissuessurgical planningcomputed tomography
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面部是人們第一眼的映像,因此它亦扮演重要的角色,有時甚至會影響在社會上的人際關係,隨著醫療技術的進步,外觀也常常成了一種探討的話題之一,而正顎手術即是種徵對臉部顎骨所做的手術。在正顎手術當中,對於執行手術的醫師們而言,術前能預測結果是一項很大的幫助與需求,因此臉部軟組織與硬組織的互動牽連關係,便是一項重要的探討議題。這項需求對於醫病之間的溝通自然更有了可以依據的橋樑。因此本篇論將提供一系統,將CT影像做3D建模,並且針對下顎骨做軟組織與硬組織的預測。
本系統流程大致分為影像前置處理、影像的分割、邊界偵測、以及統計預測及最後的3D重建。前置處理的部份,主要是去除影像中的雜訊。接著運用CT影像的特質進行分割分成主要三個區塊。在分割後的影像作局部邊界偵側,再根據組織彈性的預測結果做軟印組織的變化,最後將處理完畢的影像重建成三維模型。
It is always desired for the patients to foresee the result of their own craniofacial surgeries, whether the operation is necessary (due to facial deform, etc.) or for aesthetic purpose. Post-treatment prediction of soft tissue has been the most challenging task in that the correlation between the soft- and hard-tissues may be altered. A semi-automatic process to characterize correspondence of the pre- and post-surgery and visualized assistance for the physician are thus in dire need. In this work, we propose a soft-tissue prediction and reconstruction procedure of the plastic facial surgery includes (1) analysis of craniofacial images, (2) identify the characteristics of the soft tissues, such as fat, skin, etc., and hard tissues, such as bones, (3) reconstruction the projected facial images with treated hard tissues covered with corresponding soft tissues, and finally (4) visualization of the three-dimensional facial model. We developed an interactive and dynamic system that the physician can follow the procedure or create his or her own surgical planning scheme.
目 錄
致謝............................................................................................................2
目 錄........................................................................................................5
第一章 緒論...........................................................................................8
1.1 研究背景....................................................................................................8
1.2 研究動機....................................................................................................8
1.3 研究目的....................................................................................................9
1.4 論文架構....................................................................................................9
第二章 文獻探討.................................................................................10
2.1 軟硬組織的探討......................................................................................10
2.2 3D影像呈現與醫學上關係.....................................................................10
2.3 2D影像處理技術.....................................................................................13
2.4 VTK簡介.................................................................................................15
2.5 3D影像建模.............................................................................................16
第三章 研究方法....................................................................................18
3.1. 模擬測顱影像..........................................................................................19
3.1.1. 中値濾波器..................................................................................19
3.1.2. 低頻濾波器..................................................................................19
3.1.3. 測顱的模擬..................................................................................20
3.2. 預測特徵值之變化..................................................................................21
3.3. 預測特徵值之變化..................................................................................23
3.4. 術後影像之建立......................................................................................24
3.5. 影像分割..................................................................................................25
3.6. 硬組織與軟組織的移動..........................................................................26
第四章 系統實作.................................................................................29
第五章 結論與未來展望.....................................................................34
參考文獻..................................................................................................35
附錄..........................................................................................................37 - 5 -
圖 1 SOBEL邊緣偵測的濾鏡(SX表橫向係數,SY表縱向係數)........14
圖 2系統流程..........................................................................................18
圖 3中值濾波範例..................................................................................19
圖 4 YZ-PLANE模擬...............................................................................21
圖 5測顱之特徵點..................................................................................22
圖 6 線性迴歸.........................................................................................23
圖 7 重新變動影像.................................................................................25
圖 8 灰階亮度統計.................................................................................25
圖 9 下顎骨搜尋.....................................................................................27
圖 10 右邊部分的順序...........................................................................28
圖 11 左邊部分的順序...........................................................................28
圖 12 CT影像展示..................................................................................30
圖 13 局部區域的展示...........................................................................30
圖 14 3D影像重建...................................................................................31
圖 15 切面影像.......................................................................................31
圖 16 模擬骨骼移動1............................................................................32
圖 17 模擬骨骼移動2............................................................................32
圖 18 模擬YZ-PLANE影像.......................................................................33 - 6 -
圖 19 術前與術後的比較.......................................................................33
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