用于准静态磁共振弹性成像的运动跟踪与应变图计算
Motion tracking and strain map computation for quasi-static magnetic resonance elastography.
作者信息
Fu Y B, Chui C K, Teo C L, Kobayashi E
机构信息
Department of Mechanical Engineering, National University of Singapore, Singapore.
出版信息
Med Image Comput Comput Assist Interv. 2011;14(Pt 1):428-35. doi: 10.1007/978-3-642-23623-5_54.
This paper presents a new imaging method for quasi-static magnetic resonance elastography (MRE). Tagged magnetic resonance (MR) imaging of human lower leg was acquired with probe indentation using a MR-compatible actuation system. Indentation force was recorded for soft tissue elasticity reconstruction. Motion tracking and strain map of human lower leg are calculated using a harmonic phase (HARP)-based method. Simulated tagged MR images were constructed and analyzed to validate the HARP-based method. Our results show that the proposed imaging method can be used to generate accurate motion distribution and strain maps of the targeted soft tissue.
本文提出了一种用于准静态磁共振弹性成像（MRE）的新成像方法。使用与磁共振兼容的驱动系统，通过探头压痕获取了人体小腿的标记磁共振（MR）图像。记录压痕力以进行软组织弹性重建。使用基于谐波相位（HARP）的方法计算人体小腿的运动跟踪和应变图。构建并分析了模拟标记MR图像以验证基于HARP的方法。我们的结果表明，所提出的成像方法可用于生成目标软组织的准确运动分布和应变图。
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