使用灰階值與控制點加權的成本函數於不同病人間肺部非剛性對位 = Inte...
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  • 使用灰階值與控制點加權的成本函數於不同病人間肺部非剛性對位 = Inter-Subject Human Lung Non-Rigid Registration with Weighted Intensity and Landmark Cost Function
  • Record Type: Language materials, printed : monographic
    Paralel Title: Inter-Subject Human Lung Non-Rigid Registration with Weighted Intensity and Landmark Cost Function
    Author: 胡家祥,
    Secondary Intellectual Responsibility: 國立高雄大學
    Place of Publication: [高雄市]
    Published: 撰者;
    Year of Publication: 民100
    Description: 70葉圖,表格 : 30公分;
    Subject: 適應性區域成長
    Subject: Adaptive region growing
    Online resource: http://handle.ncl.edu.tw/11296/ndltd/91043572791810711535
    Notes: 參考書目:葉63-70
    Notes: 內容為英文
    Summary: 在不同病人間肺部對位時,若僅做灰階值的對應,只能提供少量的資訊作為判斷依據。為了將轉換添加更多物理意義,氣管的分叉點被採用為控制點。因為其在不同病人間,雖然位置有不同,但是結構是相同的,如此便可替轉換增加實質意義。 首先針對不同病人斷層掃描,找出胸部後將肺部取出,以適應性的閾值,搭配一個預先設定的信賴區間,達到快速且穩定的呼吸道擷取程序。並以擷取後的支氣管細化,以找出分支點。將不同病人間控制點配對後,進行影像對位。 本論文提出一個加權的成本函數,使得影像對位得以同時對於兩個測量值收斂。成功得到肺部轉換,使影像可不僅將灰階值轉換對應,還可以拉近兩影像間肺部的內部結構。 在五位病人交叉對位共二十五組配對,對照組僅能將平均控制點距離差靠近至64.9 mm,本方法可拉近至 17.7 mm,改進 47.2 mm,改進幅度達到 73.8%。 Human lung image registration among patients provides little information if only intensity is mapped. Though the airway branch points are position varied, they are structure agreed. They can act as landmarks to register lungs. The thoracic section is extracted from CT, and the pulmonary region is segmented. An adaptive thresholding with a confidence interval is proposed to segment the airway. A weighted cost function is proposed to registering images with both similarity measure and landmark distance measure. It successfully registers lung images. 25 pairs within 5 patients are tested. The mean landmark distance of compared method is 64.9 mm. The proposed method achieved 17.7 mm that improved 47.2 mm, and it is 73.8% better.
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310002130923 博碩士論文區(二樓) 不外借資料 學位論文 TH 008M/0019 464103 4733 2011 一般使用(Normal) On shelf 0
310002130931 博碩士論文區(二樓) 不外借資料 學位論文 TH 008M/0019 464103 4733 2011 c.2 一般使用(Normal) On shelf 0
  • 2 records • Pages 1 •
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