Magnetic resonance imaging appropriate for construction of subject-specific head models for diffuse optical tomography
Magnetic resonance imaging appropriate for construction of subject-specific head models for diffuse optical tomography
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DOI：
10.1364/boe.6.003197
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发表时间：
2015-09-01
影响因子：
3.4
通讯作者：
Okada, Eiji
中科院分区：
文献类型：
--
作者：
Kurihara, Kazuki;Kawaguchi, Hiroshi;Okada, Eiji
主体特定的头部模型，其几何形状是基于结构的磁共振图像是必不可少的，以准确地估计空间灵敏度分布的图像重建在扩散光学断层扫描。通常用于结构成像的T1加权磁共振图像不足以用于浅表组织的基于阈值的分割。两种类型的脉冲序列，这提供了一个高对比度的浅表组织之间，被引入到补充的分割，以构建特定的主题头部模型。所提出的脉冲序列采集的磁共振图像是鲁棒的阈值水平和足够的基于阈值的分割的浅表组织相比，T1和T2加权图像。所提出的脉冲序列的总扫描时间小于T2加权脉冲序列的四分之一。(C)2015美国光学学会
Subject-specific head models of which their geometry is based on structural magnetic resonance images are essential to accurately estimate the spatial sensitivity profiles for image reconstruction in diffuse optical tomography. T1-weighted magnetic resonance images, which are commonly used for structural imaging, are not sufficient for the threshold-based segmentation of the superficial tissues. Two types of pulse sequences, which provide a high contrast among the superficial tissues, are introduced to complement the segmentation to construct the subject-specific head models. The magnetic resonance images acquired by the proposed pulse sequences are robust to the threshold level and adequate for the threshold-based segmentation of the superficial tissues compared to the T1- and T2-weighted images. The total scan time of the proposed pulse sequences is less than one-fourth of that for the T2-weighted pulse sequence. (C) 2015 Optical Society of America