https://scholars.lib.ntu.edu.tw/handle/123456789/83987
標題: | A dual-snake model of high penetrability for ultrasound image boundary extraction | 作者: | Chen, Chung-Ming Lu, Henry Horng-Shing Hsiao, An-Ting |
關鍵字: | Boundary extraction; Connected components; Deformable model; Discrete gradient glow; Dual-snake model; Stability; Ultrasound images | 公開日期: | 2001 | 卷: | 27 | 期: | 12 | 起(迄)頁: | 1651-1665 | 來源出版物: | Ultrasound in Medicine & Biology | 摘要: | Most deformable models require the initial contour to be placed close to the boundary of the object of interest for boundary extraction of ultrasound (US) images, which is impractical in many clinical applications. To allow a distant initial contour, a new dual-snake model promising high penetrability through the interference of the noises is proposed in this paper. The proposed dual-snake model features a new far-reaching external force, called the discrete gradient flow, a connected component-weighted image force, and an effective stability evaluation of two underlying snakes. The experimental results show that, with a distant initial contour, the mean distance from the derived boundary to the desired boundary is less than 1.4 pixels, and most snake elements are within 2.7 pixels of the desired boundaries for the synthetic images with CNR ≥ 1. For the clinical US images, the mean distance is less than 1.9 pixels, and most snake elements are within 3 pixels of the desired boundaries. © 2002 World Federation for Ultrasound in Medicine & Biology. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/132695 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035709139&doi=10.1016%2fS0301-5629%2801%2900484-7&partnerID=40&md5=18441698cccfa617e795dd291c1665c6 |
ISSN: | 03015629 | DOI: | 10.1016/S0301-5629(01)00484-7 | SDG/關鍵字: | Boundary value problems; Contour measurement; Deformation; Discrete gradient flow; Ultrasonics; article; diagnostic accuracy; evaluation; extraction; image processing; noise; physical model; priority journal; ultrasound; Algorithms; Computer Simulation; Image Processing, Computer-Assisted; Models, Theoretical; Reproducibility of Results; Ultrasonography |
顯示於: | 醫學工程學研究所 |
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