Tunghai University Institutional Repository:Item 310901/26365
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 21921/27947 (78%)
造訪人次 : 4247092      線上人數 : 436
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://140.128.103.80:8080/handle/310901/26365


    題名: 基於區域成長法的3D超音波乳房腫瘤切割
    其他題名: Breast Tumor Segmentation on Ultrasonography Based on 3D Region Growing Method
    作者: 林琬婷
    Lin, Wan-Ting
    貢獻者: 黃育仁
    Huang, Yu-Len
    資訊工程學系
    關鍵詞: 三維區域成長法;影像切割;超音波;乳癌;腫瘤輪廓描繪
    3D region growing;image segmentation;ultrasound;breast cancer;tumor contour approximation
    日期: 2015
    上傳時間: 2015-12-22T06:01:23Z (UTC)
    摘要: 乳癌是現今婦女最常罹患的癌症,然而隨著醫療科技的進步,若早期發現則治癒率可相對提高,在醫學影像的工具中可用來診斷乳房腫瘤的方法有許多,例如:乳房X光攝影、超音波影像或是核磁共振影像。其中,超音波影像是一個很好的選擇,它不具侵入性而且可以及時造影,相較與核磁共振影像成本較低,因此乳房超音波影像檢驗為目前普遍的診斷方式。但超音波影像有些特性需要克服,它通常包含大量的雜訊及斑點,若依賴醫師的臨床經驗來判斷腫瘤的位置及良惡性,很可能會因為影像本身的雜訊導致錯誤判斷,進而影響醫生的判讀結果,因此,本文提出一個腫瘤輪廓自動描繪法來輔助醫生判讀影像資訊。此方法的前處理先採用高斯濾波和各項擴散異性濾波降低影像的雜訊,再來調整對比度使得腫瘤和背景區分出來,並讓邊緣更加明顯,切割的方法採用區域成長法,此方法的優點是簡單且省時,後處理使用型態學的方法將切割的結果進行修補,使得切出來的腫瘤可以更貼緊邊緣,與醫生手繪的結果更為相似。所有的切割方法皆為三維,相較於二維切割可以考慮較多的關聯性,使結果更為準確。本研究總共使用30個病例進行實驗,分別為15個良性及15個惡性,最後實驗切割出的結果會與醫師手動描繪的腫瘤及自動切割方法VOCAL進行比較。
    Breast cancer is the most common cancer in the woman. There is an upward trend in the number of such cases in the past years. Early diagnosis and early treatment is the most effective way of reducing mortality caused by breast cancer. Ultrasound is the common examination technology because of fast, cheap and noninvasive. The difficult part is that there are many noises and speckles on the ultrasonic images. Malignant and benign breast tumors are present different shape and size, thus this study propose a robust segmentation method to assist the physician on contouring tumor boundary. The proposed method first utilizes a pre-processing procedure to reduce the noises and speckle in imaging. After that, three-dimensional (3D) region growing method is applies to segment the tumor area. Finally, the proposed method made the area smoother and correctly though a post processing step. This study evaluated total of 30 tumor cases and four practical similarity measures (similarity index, overlap fraction, overlap value, and extraction fraction) are used to evaluate the result between the manually determined contours, an automatically method named virtual organ computer-aided analysis (VOCAL) and the proposed segmentation method.
    顯示於類別:[資訊工程學系所] 碩士論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    103THU00394011-001.pdf29564KbAdobe PDF157檢視/開啟


    在THUIR中所有的資料項目都受到原著作權保護.


    本網站之東海大學機構典藏數位內容,無償提供學術研究與公眾教育等公益性使用,惟仍請適度,合理使用本網站之內容,以尊重著作權人之權益。商業上之利用,則請先取得著作權人之授權。

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋