2 May 2003 Reconstruction of velocity fields inside the myocardium using Tikhonov regularization
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Abstract
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.
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Mark Hastenteufel, Mark Hastenteufel, Ivo Wolf, Ivo Wolf, Raffaele de Simone, Raffaele de Simone, Sibylle Mottl-Link, Sibylle Mottl-Link, Hans-Peter Meinzer, Hans-Peter Meinzer, } "Reconstruction of velocity fields inside the myocardium using Tikhonov regularization", Proc. SPIE 5031, Medical Imaging 2003: Physiology and Function: Methods, Systems, and Applications, (2 May 2003); doi: 10.1117/12.480411; https://doi.org/10.1117/12.480411
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