Access Restriction

Author Kaihua Zhang, A. ♦ Lei Zhang, A. ♦ Su Zhang, B.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Bias Correction ♦ Variational Level ♦ Tissue Segmentation ♦ Different Tissue ♦ Gaussian Distribution ♦ Various Modality ♦ Automatic Application ♦ Transformed Domain ♦ Simultaneous Tissue Segmentation ♦ Novel Level ♦ Entire Domain ♦ Energy Minimization ♦ Bias Field ♦ Index Term Level ♦ Intensity Domain ♦ Superior Performance ♦ Sliding Window ♦ Maximum Likelihood Objective Function ♦ State-of-the-art Method ♦ Variational Method ♦ Intensity Belonging ♦ Evolution Process ♦ Magnetic Resonance Imaging
Abstract This paper presents a novel level set approach to simultaneous tissue segmentation and bias correction of Magnetic Resonance Imaging (MRI) images. We first model the distribution of intensity belonging to each tissue as a Gaussian distribution with spatially varying mean and variance. Then a sliding window is used to transform the intensity domain to another domain, where the distribution overlap between different tissues is significantly suppressed. A maximum likelihood objective function is defined for each point in the transformed domain, which is then integrated over the entire domain to form a variational level set formulation. Tissue segmentation and bias correction are simultaneously achieved via a level set evolution process. The proposed method is robust to initialization, thereby allowing automatic applications. Experiments on images of various modalities demonstrated the superior performance of the proposed approach over state-of-the-art methods. Index Terms — level set, segmentation, bias field, variational method, energy minimization 1.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article