Rhesus macaque brain morphometry: a methodological comparison of voxel-wise approaches.

Rhesus macaque brain morphometry: a methodological comparison of voxel-wise approaches.
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DOI:
10.1016/j.ymeth.2009.10.003
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发表时间:
2010-03
期刊:
影响因子:
4.8
通讯作者:
Johnson, Sterling C.
Johnson, Sterling C.
中科院分区:
生物学3区
文献类型:
--
作者:
McLaren, Donald G.;Kosmatka, Kristopher J.;Kastman, Erik K.;Bendlin, Barbara B.;Johnson, Sterling C.

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在过去的几年里,基于体素的形态测量研究在人类神经影像学中变得越来越普遍。然而,很少有研究利用这种方法来研究非人类灵长类动物的形态变化。在这里,我们使用 112RM-SL 模板和先验描述了体素形态测量方法在恒河猴 (Macaca mulatta) 上的应用,作为说明性示例,我们描述了灰质形态测量中与年龄相关的变化。具体来说,我们评估了使用统计参数映射(SPM)软件和 FMRIB 软件库(FSL)中的 FMRIB 自动分割工具(FAST)实现的统一分割例程;改变平滑核的效果;以及标准化例程的效果。我们发现,在研究非人类灵长类动物时,大脑图像需要的平滑度比人类研究中的平滑度要低(2-4mm FWHM)。使用流场变形 (DARTEL) 改进了对象间对齐,导致结果更可能是由于形态测量差异而不是配准差异造成的。
Voxel-based morphometry studies have become increasingly common in human neuroimaging over the past several years; however, few studies have utilized this method to study morphometry changes in non-human primates. Here we describe the application of voxel-wise morphometry methods to the rhesus macaque (Macaca mulatta) using the 112RM-SL template and priors and as an illustrative example we describe age-associated changes in grey matter morphometry. Specifically, we evaluated the unified segmentation routine implemented using Statistical Parametric Mapping (SPM) software and the FMRIB’s Automated Segmentation Tool (FAST) in the FMRIB Software Library (FSL); the effect of varying the smoothing kernel; and the effect of the normalization routine. We found that when studying non-human primates, brain images need less smoothing than in human studies, 2–4mm FWHM. Using flow field deformations (DARTEL) improved inter-subject alignment leading to results that were more likely due to morphometry differences as opposed to registration differences.
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