Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA.
Ultrasound Med Biol. 2012 Jul;38(7):1284-97. doi: 10.1016/j.ultrasmedbio.2012.03.007.
We describe a novel method for computing dense 3D myocardial motion with high accuracy in four-dimensional (4D) echocardiography (3 dimensions spatial plus time). The method is based on a classic variational optical flow technique but exploits modern developments in optical flow research to utilize the full capabilities of 4D echocardiography. Using a variety of metrics, we present an in-depth performance evaluation of the method on synthetic, phantom, and intraoperative 4D transesophageal echocardiographic data. When compared with state-of-the-art optical flow and speckle tracking techniques currently found in 4D echocardiography, the method we present shows notable improvements in error rates. We believe the performance improvements shown can have a positive impact when the method is used as input for various applications, such as strain computation, biomechanical modeling, and automated diagnostics.
我们描述了一种新颖的方法，用于在四维（4D）超声心动图（3 维空间加时间）中以高精度计算密集的 3D 心肌运动。该方法基于经典的变分光流技术，但利用光流研究的现代发展，充分利用 4D 超声心动图的全部功能。使用各种指标，我们对该方法在合成、幻影和术中经食管 4D 超声心动图数据上的性能进行了深入评估。与目前在 4D 超声心动图中使用的最先进的光流和斑点跟踪技术相比，我们提出的方法在误差率方面有显著提高。我们相信，当该方法作为各种应用（如应变计算、生物力学建模和自动诊断）的输入时，所显示的性能改进将产生积极的影响。
