Structural MR Analyses of Drug Exposed Brains

药物暴露大脑的结构磁共振分析

• 批准号: 6769081
• 负责人: BARRY E KOSOFSKY
• 金额: $ 38.52万
• 依托单位: MASSACHUSETTS GENERAL HOSPITAL
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6769081
• 关键词: behavior test; bioimaging /biomedical imaging; brain imaging /visualization /scanning; brain morphology; clinical research; cocaine; embryo /fetus drug adverse effect; human subject; intelligence tests; magnetic resonance imaging; middle childhood (6-11); patient oriented research; substance abuse epidemiology

DESCRIPTION (provided by applicant): Our group proposes experiments to utilize automated segmentation tools that have been utilized on Adult MRIs to analyze a set of structural MR scans obtained from children exposed to cocaine in utero. The analysis will include both shape and contour analysis of subcortical structures, as well as the analyses of cortical structures including measurement of cortical volume, surface area, thickness, and folding pattern of the entire cortex parcellated in to specific cortical areas. By forming a collaborative imaging alliance at Brown University, our proposal will be focused on studying structural MR data from cocaine and alcohol exposed 8 to 12-year-olds. To date he and his imaging group have collected data from 14 such individuals, which we have analyzed and provide pilot data from, thereby demonstrating the feasibility and analytic power of the proposed studies. The biologic hypotheses to be tested on the drug exposed population, supported by per preliminary data, is that cocaine and alcohol induced alterations in brain development produce specific alterations in the size and shape of particular subcortical structures, and in the volume and folding pattern of particular cortical areas. Our study of shape analysis has initially focus on the corpus callosum, which in previous studies by others was shown to be altered in shape as a result of prenatal exposure to alcohol. Our morphometric studies have focused on particular cortical (orbito-frontal, frontal, and anterior cingulate) and subcortical (caudate, putamen) structures that we hypothesize are specifically altered by prenatal exposure to cocaine, with resulting functional deficits in attention, reactivity, and responsivity. We additionally propose experiments to validate our automated segmentation and morphometric methods to identify cocaine and alcohol-induced differences in the size, shape and contour brain structures of exposed children. By developing and applying such tools we will not only address a clinically important problem, but we will develop methods that will be of general value to others pursuing pediatric neuroimaging studies.

描述（由申请人提供）： 我们的小组提出了利用自动分割工具的实验，这些工具已用于成人MRI，以分析从子宫内暴露于可卡因的儿童获得的一组结构MR扫描。该分析将包括皮质下结构的形状和轮廓分析，以及皮质结构的分析，包括测量皮质体积、表面积、厚度和包裹在特定皮质区域中的整个皮质的折叠模式。通过在布朗大学建立一个合作成像联盟，我们的建议将集中在研究8至12岁接触可卡因和酒精的儿童的结构MR数据上。到目前为止，他和他的成像小组已经收集了14个这样的人的数据，我们已经分析并提供了试点数据，从而证明了拟议研究的可行性和分析能力。在药物暴露人群中检验的生物学假设得到初步数据的支持，即可卡因和酒精诱导的大脑发育变化会导致特定皮质下结构的大小和形状以及特定皮质区域的体积和折叠模式发生特定变化。我们的形状分析的研究最初集中在胼胝体，这在以前的研究被证明是改变形状的结果，产前暴露于酒精。我们的形态学研究集中在特定的皮质（眶额，额，前扣带）和皮质下（尾状核，壳核）的结构，我们假设是专门改变产前暴露于可卡因，从而导致功能缺陷的注意力，反应性和反应性。我们还提出了实验来验证我们的自动分割和形态测量方法，以确定可卡因和酒精引起的暴露儿童的大小，形状和轮廓大脑结构的差异。通过开发和应用这些工具，我们将不仅解决临床上的重要问题，但我们将开发的方法，将是一般价值的其他人追求儿科神经影像学研究。