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

(RS)-EPI和改进的(SAP)-EPI畸变校正方法

• 批准号: 8362963
• 负责人: STEFAN SKARE
• 金额: $ 1.95万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-04-01 至 2012-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8362963
• 关键词: Annual Reports; Characteristics; Diffusion weighted imaging; Funding; Grant; Image; Magnetic Resonance; Methods; National Center for Research Resources; Principal Investigator; Reading; Research; Research Infrastructure; Resolution; Resources; Scanning; Slice; Source; Technology; Time; United States National Institutes of Health; Visit; Work; abstracting; cost; improved

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)

该子项目是利用资源的众多研究子项目之一 由 NIH/NCRR 资助的中心拨款提供。子项目的主要支持 并且子项目的主要研究者可能是由其他来源提供的， 包括其他 NIH 来源。 子项目可能列出的总成本 代表子项目使用的中心基础设施的估计数量， NCRR 赠款不直接向子项目或子项目工作人员提供资金。 短轴读出螺旋桨 EPI（SAP-EPI）和“读出分段 EPI”（RS-EPI）已被提议用于高 分辨率扩散加权（DW）成像。 SAP-EPI 和 RS-EPI 具有共同的特征，即 k 空间是 由多个 EPI“段”（称为刀片 (SAP-EPI) 或百叶窗 (RS-EPI)）穿过，以减少失真 模糊通常会妨碍 EPI 图像。我们之前比较 RS-EPI 和 SAP-EPI 的工作得出的结论是 SAP-EPI 尽管尝试校正失真，但与 RS-EPI 相比，其模糊程度要高得多。随着改进的 失真校正方法，我们证明了 SAP-EPI 在给定 SNR 的情况下会产生与 RS-EPI 相似的图像分辨率 针对扫描时间/切片进行归一化。 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 摘要）