title: Boundary extraction of breast ultrasonic images.
abstract: The accurate boundary extraction is an essential preprocessing step for computerized analysis of a breast ultrasonic image. In this study, a novel approach based on the wavelet transform and the dynamic programming is proposed to extract tumor boundaries from breast ultrasonic images. Firstly, a rectangular region-of-interest (ROI) is manually selected from the ultrasonic image, followed by the ROI-based preprocessing for the noise reduction and image enhancement. Then an initial boundary of the tumor is obtained using the wavelet transform. To achieve a more accurate result, a dynamic programming algorithm based on the active contour model is applied to adjust the initial boundary. Experiments on 45 breast ultrasonic images have shown that this proposed method is a promising technique for the boundary extraction of breast tumor on ultrasonic images.
authors.affiliation: Dept. of Electron. Eng., Fudan Univ., Shanghai, China.
authors.forename: Jialin
authors.initials: J
authors.lastname: Shen
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Wang
authors.forename: Jianguo
authors.initials: J
authors.lastname: Yu
authors.forename: Weiqi
authors.initials: W
authors.lastname: Wang
mesh_terms: D000465:Algorithms; D001698:Biomedical Engineering; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016217:Ultrasonography, Mammary / Q000706:statistics & numerical data*