title: Prostate segmentation in MR images using discriminant boundary features.
abstract: Segmentation of the prostate in magnetic resonance image has become more in need for its assistance to diagnosis and surgical planning of prostate carcinoma. Due to the natural variability of anatomical structures, statistical shape model has been widely applied in medical image segmentation. Robust and distinctive local features are critical for statistical shape model to achieve accurate segmentation results. The scale invariant feature transformation (SIFT) has been employed to capture the information of the local patch surrounding the boundary. However, when SIFT feature being used for segmentation, the scale and variance are not specified with the location of the point of interest. To deal with it, the discriminant analysis in machine learning is introduced to measure the distinctiveness of the learned SIFT features for each landmark directly and to make the scale and variance adaptive to the locations. As the gray values and gradients vary significantly over the boundary of the prostate, separate appearance descriptors are built for each landmark and then optimized. After that, a two stage coarse-to-fine segmentation approach is carried out by incorporating the local shape variations. Finally, the experiments on prostate segmentation from MR image are conducted to verify the efficiency of the proposed algorithms.
authors.affiliation: Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, Shaanxi, China. meijuan.yang@opt.ac.cn
authors.forename: Meijuan
authors.initials: M
authors.lastname: Yang
authors.forename: Xuelong
authors.initials: X
authors.lastname: Li
authors.forename: Baris
authors.initials: B
authors.lastname: Turkbey
authors.forename: Peter L
authors.initials: PL
authors.lastname: Choyke
authors.forename: Pingkun
authors.initials: P
authors.lastname: Yan
mesh_terms: D000465:Algorithms; D016002:Discriminant Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D011467:Prostate / Q000033:anatomy & histology* / Q000473:pathology*; D011471:Prostatic Neoplasms / Q000473:pathology; D015203:Reproducibility of Results