標題: | Correction of inhomogeneous magnetic resonance images using multiscale retinex for segmentation accuracy improvement |
作者: | Chao, Wen-Hung Lai, Hsin-Yi Shih, Yen-Yu I. Chen, You-Yin Lo, Yu-Chun Lin, Sheng-Huang Tsang, Siny Wu, Robby Jaw, Fu-Shan 電機工程學系 Department of Electrical and Computer Engineering |
關鍵字: | Segmentation;Boosted decision tree;Multiscale retinex;Spatial feature;Brain tissue |
公開日期: | 1-三月-2012 |
摘要: | The purpose of this study was to improve the accuracy of tissue segmentation on brain magnetic resonance (MR) images preprocessed by multiscale retinex (MSR), segmented with a combined boosted decision tree (BDT) and MSR algorithm (hereinafter referred to as the MSRBDT algorithm). Simulated brain MR (SBMR) T1-weighted images of different noise levels and RF inhomogeneities were adopted to evaluate the outcome of the proposed method; the MSRBDT algorithm was used to identify the gray matter (GM), white matter (WM), and cerebral-spinal fluid (CSF) in the brain tissues. The accuracy rates of GM, WM, and CSF segmentation, with spatial features (G, x, y, r, theta), were respectively greater than 0.9805, 0.9817, and 0.9871. In addition, images segmented with the MSRBDT algorithm were better than those obtained with the expectation maximization (EM) algorithm; brain tissue segmentation in MR images was significantly more precise. The proposed MSRBDT algorithm could be beneficial in clinical image segmentation. (C) 2011 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.bspc.2011.04.001 http://hdl.handle.net/11536/15831 |
ISSN: | 1746-8094 |
DOI: | 10.1016/j.bspc.2011.04.001 |
期刊: | BIOMEDICAL SIGNAL PROCESSING AND CONTROL |
Volume: | 7 |
Issue: | 2 |
起始頁: | 129 |
結束頁: | 140 |
顯示於類別: | 期刊論文 |