Comput Methods Programs Biomed - A review of atlas-based segmentation for magnetic resonance brain images.

Tópicos

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Resumo

Normal and abnormal brains can be segmented by registering the target image with an atlas. Here, an atlas is defined as the combination of an intensity image (template) and its segmented image (the atlas labels). After registering the atlas template and the target image, the atlas labels are propagated to the target image. We define this process as atlas-based segmentation. In recent years, researchers have investigated registration algorithms to match atlases to query subjects and also strategies for atlas construction. In this paper we present a review of the automated approaches for atlas-based segmentation of magnetic resonance brain images. We aim to point out the strengths and weaknesses of atlas-based methods and suggest new research directions. We use two different criteria to present the methods. First, we refer to the algorithms according to their atlas-based strategy: label propagation, multi-atlas methods, and probabilistic techniques. Subsequently, we classify the methods according to their medical target: the brain and its internal structures, tissue segmentation in healthy subjects, tissue segmentation in fetus, neonates and elderly subjects, and segmentation of damaged brains. A quantitative comparison of the results reported in the literature is also presented.

Resumo Limpo

normal abnorm brain can segment regist target imag atlas atlas defin combin intens imag templat segment imag atlas label regist atlas templat target imag atlas label propag target imag defin process atlasbas segment recent year research investig registr algorithm match atlas queri subject also strategi atlas construct paper present review autom approach atlasbas segment magnet reson brain imag aim point strength weak atlasbas method suggest new research direct use two differ criteria present method first refer algorithm accord atlasbas strategi label propag multiatla method probabilist techniqu subsequ classifi method accord medic target brain intern structur tissu segment healthi subject tissu segment fetus neonat elder subject segment damag brain quantit comparison result report literatur also present

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