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Optimizing PiB-PET SUVR Change-Over-Time Measurement by a large-scale analysis of Longitudinal Reliability Plausibility Separability and Correlation with MMSE

机译:通过对纵向可靠性合理性可分离性以及与MMSE的相关性进行大规模分析优化PiB-PET SUVR随时间变化的测量

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摘要

Quantitative measurements of change in β-amyloid load from Positron Emission Tomography (PET) images play a critical role in clinical trials and longitudinal observational studies of Alzheimer’s disease. These measurements are strongly affected by methodological differences between implementations, including choice of reference region and use of partial volume correction, but there is a lack of consensus for an optimal method. Previous works have examined some relevant variables under varying criteria, but interactions between them prevent choosing a method via combined meta-analysis. In this work, we present a thorough comparison of methods to measure change in β-amyloid over time using Pittsburgh Compound B (PiB) PET imaging.MethodsWe compare 1,024 different automated software pipeline implementations with varying methodological choices according to four quality metrics calculated over three-timepoint longitudinal trajectories of 129 subjects: reliability (straightness/variance); plausibility (lack of negative slopes); ability to predict accumulatoron-accumulator status from baseline value; and correlation between change in β-amyloid and change in Mini Mental State Exam (MMSE) scores.
机译:正电子发射断层扫描(PET)图像对β淀粉样蛋白负荷变化的定量测量在阿尔茨海默氏病的临床试验和纵向观察研究中起着至关重要的作用。这些测量结果受到实现方式之间的方法差异的强烈影响,包括参考区域的选择和部分体积校正的使用,但对于最佳方法尚缺乏共识。先前的工作已经检查了不同标准下的一些相关变量,但是它们之间的相互作用阻止了通过组合荟萃分析选择方法。在这项工作中,我们对使用匹兹堡化合物B(PiB)PET成像测量β淀粉样蛋白随时间变化的方法进行了全面的比较。方法我们根据三种方法计算出的四个质量指标,比较了1,024种具有不同方法学选择的自动化软件管道实施方案129个对象的时间点纵向轨迹:可靠性(直线度/方差);合理性(没有负斜率);从基准值预测累加器/非累加器状态的能力; β-淀粉样蛋白变化与迷你精神状态检查(MMSE)得分之间的相关性。

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