(RS)-EPI AND AN IMPROVED DISTORTION CORRECTION METHOD FOR (SAP)-EPI

这个子项目是利用资源的许多研究子项目之一。 由NIH/NCRR资助的中心拨款提供。对子项目的主要支持 子项目的首席调查员可能是由其他来源提供的， 包括美国国立卫生研究院的其他来源。为子项目列出的总成本可能 表示该子项目使用的中心基础设施的估计数量， 不是由NCRR赠款提供给次级项目或次级项目工作人员的直接资金。 短轴读出推进器EPI(SAP-EPI)和读出分段EPI(RS-EPI)已被提出用于HIGH 分辨率扩散加权(DW)成像。SAP-EPI和RS-EPI共享共同特征，因为k空间是 被几个EPI‘段’(称为刀片(SAP-EPI)或百叶窗(RS-EPI))遍历，以减少失真 以及模糊，这通常会阻碍EPI图像。我们之前的工作比较了RS-EPI和SAP-EPI，得出的结论是SAP-EPI 尽管试图纠正失真，但与RS-EPI相比，图像的模糊程度要高得多。具有改进的 我们证明了在给定的SNR下，SAP-EPI的图像分辨率与RS-EPI的图像分辨率相似 针对扫描时间/切片进行了标准化。 要了解卢卡斯中心正在进行的其他项目，请访问http://rsl.stanford.edu/(卢卡斯年度报告和 ISMRM 2011年摘要)

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Short-Axis readout Propeller EPI' (SAP-EPI) and 'Readout-Segmented EPI' (RS-EPI) have been proposed for use in high resolution diffusion-weighted (DW) imaging. SAP-EPI and RS-EPI share common characteristics, in that k-space is traversed by several EPI 'segments' (referred to as blades (SAP-EPI) or blinds (RS-EPI)) in order to reduce the distortion and blurring that typically hampers EPI images. Our previous work comparing RS-EPI and SAP-EPI concluded that SAP-EPI suffers from considerably more blurring compared with RS-EPI despite attempts to correct for distortion. With an improved distortion correction method, we demonstrate that SAP-EPI results in a similar image resolution to RS-EPI for a given SNR normalized for scan time/slice. To read about other projects ongoing at the Lucas Center, please visit http://rsl.stanford.edu/ (Lucas Annual Report and ISMRM 2011 Abstracts)