Single echo acquisition magnetic resonance imaging
Single echo acquisition magnetic resonance imaging
复制标题
单回波采集磁共振成像
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
M. McDougall
中科院分区：
文献类型：
--
作者：
M. McDougall
单回波采集磁共振成像。（2004年12月）玛丽普雷斯顿麦克杜格尔，学士，德克萨斯A&M大学; M.S.E.，约翰霍普金斯大学咨询委员会主席：Steven Wright博士过去15年来，通过基于梯度的方法更有效、更快速地对k空间进行采样，磁共振成像（MRI）扫描时间的显著改善无法持续，因为硬件和安全限制的阈值已经接近。并行成像方法（使用多个接收器线圈来部分地编码k空间）已经在努力中提供了一些缓解，并且正在迅速成为当前努力减少扫描时间的焦点。理想情况下，对于某些应用，相位编码将被完全消除，取而代之的是阵列线圈编码，并且整个图像形成在单个回波中。这项工作的主要目标是探索加速度限制-实施和研究单回波采集磁共振成像（SEA MRI）的方法。有前途的阵列线圈设计的初步评价进行了说明，根据参数确定的能力，使成像方法。场模式的分析，去耦，和信号噪声比（SNR），导致最终的64通道阵列线圈的设计，和4.7T和1.5T设计的线圈的制造和测试进行了说明。第一个SEA图像的获得的详细描述-64 × N读出图像，在一个单一的回波采集-提供了这些图像和高度加速图像（通过并行成像技术）的SNR和伪影功率的基础上的评价。最后，各种MR应用的方法的发展进行了描述：应用程序，特别是受益于成像方法的速度，或那些方法或工具（阵列线圈）借给自己。这些应用包括但不限于3D成像（切片选择方向上的相位编码）、分辨率增强成像、大规模（视场）显微镜和共形表面成像。最后，使用该方法的主要功能-以仅受采集单个回波所需时间限制的速度获得完整MR图像的能力-讨论了极高的帧速率成像。
Single Echo Acquisition Magnetic Resonance Imaging. (December 2004) Mary Preston McDougall, B.S., Texas A&M University; M.S.E., Johns Hopkins University Chair of Advisory Committee: Dr. Steven Wright The dramatic improvement in magnetic resonance imaging (MRI) scan time over the past fifteen years through gradient-based methods that sample k-space more efficiently and quickly cannot be sustained, as thresholds regarding hardware and safety limitations are already being approached. Parallel imaging methods (using multiple receiver coils to partially encode k-space) have offered some relief in the efforts and are rapidly becoming the focus of current endeavors to decrease scan time. Ideally, for some applications, phase encoding would be eliminated completely, replaced with array coil encoding instead, and the entire image formed in a single echo. The primary objective of this work was to explore that acceleration limit – to implement and investigate the methodology of single echo acquisition magnetic resonance imaging (SEA MRI). The initial evaluation of promising array coil designs is described, based on parameters determined by the ability to enable the imaging method. The analyses of field patterns, decoupling, and signal-to-noise ratio (SNR) that led to the final 64-channel array coil design are presented, and the fabrication and testing of coils designed for 4.7T and 1.5T are described. A detailed description of the obtainment of the first SEA images – 64xNreadout images, acquired in a single echo – is provided with an evaluation of those images and highly accelerated images (through parallel imaging techniques) based on SNR and artifact power. Finally, the development of methodologies for various MR applications is described: applications that would particularly benefit from the speed of the imaging method, or those to which the method or the tool (array coil) lends itself. These applications include, but are not limited to, 3D imaging (phase encode in the slice select direction), resolution-enhanced imaging, large-scale (field-ofview) microscopy, and conformal surface imaging. Finally, using the primary enablement of the method – the ability to obtain complete MR images at speeds limited only by the time it takes to acquire a single echo – is presented with a discussion of extremely high frame rate imaging.
使用 k-t 螺旋采集提高化学位移编码超极化 13 C 磁共振波谱成像的重建稳定性。
影响因子：
3.3
作者：
Macdonald,ErinB;Barton,GregoryP;Cox,BenjaminL;Johnson,KevinM;Strigel,RobertaM;Fain,SeanB
通讯作者：
Fain,SeanB