Three-dimensional magnetic resonance myocardial motion tracking from a single image plane
Three-dimensional magnetic resonance myocardial motion tracking from a single image plane
复制标题
DOI：
10.1002/mrm.21267
复制
发表时间：
2007-07-01
影响因子：
3.3
通讯作者：
Stuber, Matthias
中科院分区：
文献类型：
--
作者：
Abd-Elmoniem, Khaled Z.;Osman, Nael F.;Stuber, Matthias
用于量化心肌运动的三维成像是评估心脏病的关键步骤。提出了一种自动跟踪三维心肌位移的标记磁共振成像方法。与其他技术不同，该方法从单个图像平面跟踪平面内和平面内运动，而不影响图像采集的持续时间。随后，在 CSPAMM 采集之后，将小的 z 编码梯度添加到切片中切片选择梯度脉冲的重聚焦波瓣。相反极性的 z 编码梯度被添加到正交标签方向。附加的 z 梯度对切片的瞬时平面位置进行编码。垂直和水平标签用于解析平面内运动，而添加的 z 梯度用于解析平面内运动。后处理自动解码获取的数据并跟踪每个电影帧图像平面内每个材料点的三维位移。实验包括人体模型和体内验证。这些研究表明，从标记图像中同时提取面内和平面位移和路径线是可以实现的。这种能力应该为科学和临床目的的心脏运动和应变的自动量化开辟新的途径。 Magn Reson Med 58:92-102, 2007。(c) 2007 Wiley-Liss, Inc.
Three-dimensional imaging for the quantification of myocardial motion is a key step in the evaluation of cardiac disease. A tagged magnetic resonance imaging method that automatically tracks myocardial displacement in three dimensions is presented. Unlike other techniques, this method tracks both in-plane and through-plane motion from a single image plane without affecting the duration of image acquisition. A small z-encoding gradient is subsequently added to the refocusing lobe of the slice-selection gradient pulse in a slice following CSPAMM acquisition. An opposite polarity z-encoding gradient is added to the orthogonal tag direction. The additional z-gradients encode the instantaneous through plane position of the slice. The vertical and horizontal tags are used to resolve in-plane motion, while the added z-gradients is used to resolve through-plane motion. Postprocessing automatically decodes the acquired data and tracks the three-dimensional displacement of every material point within the image plane for each cine frame. Experiments include both a phantom and in vivo human validation. These studies demonstrate that the simultaneous extraction of both in-plane and through-plane displacements and pathlines from tagged images is achievable. This capability should open up new avenues for the automatic quantification of cardiac motion and strain for scientific and clinical purposes. Magn Reson Med 58:92-102, 2007. (c) 2007 Wiley-Liss, Inc.