RETROSPECTIVE DETECTION OF INTERLEAVED SLICE ACQUISITION PARAMETERS FROM FMRI DATA.
RETROSPECTIVE DETECTION OF INTERLEAVED SLICE ACQUISITION PARAMETERS FROM FMRI DATA.
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DOI：
10.1109/isbi.2014.6867803
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发表时间：
2014-04
期刊：
影响因子：
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通讯作者：
Razlighi QR
中科院分区：
文献类型：
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作者：
Parker D;Rotival G;Laine A;Razlighi QR
为了最大限度地减少相邻切片的切片激励泄漏，如今在功能磁共振成像扫描仪中定期执行交错切片采集。在交错切片采集中，两次连续切片采集之间跳过的切片数量通常称为“交错参数”；该参数的丢失对于功能磁共振成像数据的分析可能是灾难性的。在本文中，我们提出了一种回顾性检测交错参数及其应用轴的方法。我们的方法依赖于时间距离相关函数的平滑性，该函数沿着应用交错切片采集的轴被破坏。我们在存在生理噪声、运动等 fMRI 伪影的情况下，在模拟和真实数据上检查了该方法。我们还检查了该方法在检测不同类型的交错参数方面的可靠性，并在 1000 多次真实 fMRI 扫描中证明了约 94% 的准确度。
To minimize slice excitation leakage to adjacent slices, interleaved slice acquisition is nowadays performed regularly in fMRI scanners. In interleaved slice acquisition, the number of slices skipped between two consecutive slice acquisitions is often referred to as the ‘interleave parameter’; the loss of this parameter can be catastrophic for the analysis of fMRI data. In this article we present a method to retrospectively detect the interleave parameter and the axis in which it is applied. Our method relies on the smoothness of the temporal-distance correlation function, which becomes disrupted along the axis on which interleaved slice acquisition is applied. We examined this method on simulated and real data in the presence of fMRI artifacts such as physiological noise, motion, etc. We also examined the reliability of this method in detecting different types of interleave parameters and demonstrated an accuracy of about 94% in more than 1000 real fMRI scans.