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Groupwise shape correspondence with local features.

机译:与局部特征成组的形状对应。

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摘要

Statistical shape analysis of anatomical structures plays an important role in many medical image analysis applications such as understanding the structural changes in anatomy in various stages of growth or disease. Establishing accurate correspondence across object populations is essential for such statistical shape analysis studies. However, anatomical correspondence is rarely a direct result of spatial proximity of sample points but rather depends on many other features such as local curvature, position with respect to blood vessels, or connectivity to other parts of the anatomy.;This dissertation presents a novel method for computing point-based correspondence among populations of surfaces by combining spatial location of the sample points with non-spatial local features. A framework for optimizing correspondence using arbitrary local features is developed. The performance of the correspondence algorithm is objectively assessed using a set of evaluation metrics.;The main focus of this research is on correspondence across human cortical surfaces. Statistical analysis of cortical thickness, which is key to many neurological research problems, is the driving problem. I show that incorporating geometric (sulcal depth) and non-geometric (DTI connectivity) knowledge about the cortex significantly improves cortical correspondence compared to existing techniques. Furthermore, I present a framework that is the first to allow the white matter fiber connectivity to be used for improving cortical correspondence.
机译:解剖结构的统计形状分析在许多医学图像分析应用中起着重要作用,例如了解生长或疾病各个阶段的解剖结构变化。建立跨对象群体的准确对应关系对于此类统计形状分析研究至关重要。然而,解剖学上的对应关系很少是样本点在空间上接近的直接结果,而是取决于许多其他特征,例如局部曲率,相对于血管的位置或与解剖学其他部分的连通性。通过将采样点的空间位置与非空间局部特征相结合来计算表面总体之间的基于点的对应关系。开发了使用任意局部特征优化对应关系的框架。对应算法的性能是使用一组评估指标客观地评估的。这项研究的主要重点是人类皮层表面之间的对应。皮层厚度的统计分析是驱动问题,这是许多神经病学研究问题的关键。我发现,与现有技术相比,结合皮质的几何(龈深)和非几何(DTI连接性)知识可以显着改善皮质的对应性。此外,我提出了第一个允许将白质纤维连通性用于改善皮质对应性的框架。

著录项

  • 作者

    Oguz, Ipek.;

  • 作者单位

    The University of North Carolina at Chapel Hill.;

  • 授予单位 The University of North Carolina at Chapel Hill.;
  • 学科 Engineering Biomedical.;Computer Science.;Health Sciences Radiology.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 122 p.
  • 总页数 122
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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