Correction of inhomogeneous magnetic resonance images using multiscale retinex for segmentation accuracy improvement

Wen Hung Chao, Hsin Yi Lai, Yen Yu I Shih, You Yin Chen, Yu Chun Lo, Sheng Huang Lin, Siny Tsang, Robby Wu, Fu Shan Jaw

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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, θ), 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.

Original languageEnglish
Pages (from-to)129-140
Number of pages12
JournalBiomedical Signal Processing and Control
Volume7
Issue number2
DOIs
Publication statusPublished - Mar 2012
Externally publishedYes

Keywords

  • Boosted decision tree
  • Brain tissue
  • Multiscale retinex
  • Segmentation
  • Spatial feature

ASJC Scopus subject areas

  • Health Informatics
  • Signal Processing

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