首页> 外文会议>Conference on Physiology and Function: Methods, Systems, and Applications Feb 16-18, 2003 San Diego, California, USA >Reconstruction of velocity fields inside the myocardium using Tikhonov regularization
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Reconstruction of velocity fields inside the myocardium using Tikhonov regularization

机译:使用Tikhonov正则化重建心肌内部速度场

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Most cardiac diseases, like coronary artery disease or valve defects, are related to wall motion malfunctions. Much research has been done in the estimation of cardiac movement using magnetic resonance (MR) techniques, like MR tagging or phase contrast MR. But echocardiography (cardiac ultrasound) is still the method of choice in clinical routine. Besides visual, subjective wall motion scoring using gray-scale data, myocardial velocities can be obtained using tissue Doppler techniques. A major limitation of Doppler techniques is the one-dimensional estimation of velocities: only the component towards transducer position is measured. Assessing the true velocity field will lead to a more objective measurement. In this paper we describe a method for reconstructing velocity fields using a-priori information about the solution. The feasibility is quantitatively evaluated using simulated data of typical velocity patterns. Translation, contraction and shear movement can be reconstructed well. The proposed method can also be used for the reconstruction of blood flow velocities using color Doppler.
机译:大多数心脏疾病(例如冠状动脉疾病或瓣膜缺陷)与壁运动故障有关。在使用磁共振(MR)技术(例如MR标签或相衬MR)估算心脏运动方面,已经进行了很多研究。但是超声心动图(心脏超声)仍然是临床常规检查的首选方法。除了使用灰度数据进行视觉,主观的壁运动评分外,还可以使用组织多普勒技术获得心肌速度。多普勒技术的主要局限性是速度的一维估计:仅测量朝向换能器位置的分量。评估真实速度场将导致更客观的测量。在本文中,我们描述了一种使用有关解的先验信息来重建速度场的方法。使用典型速度模式的模拟数据对可行性进行了定量评估。平移,收缩和剪切运动可以很好地重建。所提出的方法也可以用于利用彩色多普勒重建血流速度。

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