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• W2336723103 abstract "Accurate description of myocardial deformation in the left ventricle is a three-dimensional problem, requiring three normal strain components along its natural axis, that is, longitudinal, radial, and circumferential strains. Although longitudinal strains are best estimated from long-axis views, radial and circumferential strains are best depicted in short-axis views. An algorithm that utilizes a polar grid for short-axis views previously developed in our laboratory for a Lagrangian description of tissue deformation is utilized for radial and circumferential displacement and strain estimation. Deformation of the myocardial wall, utilizing numerical simulations with ANSYS, and a finite-element analysis-based canine heart model were adapted as the input to a frequency-domain ultrasound simulation program to generate radiofrequency echo signals. Clinical in vivo data were also acquired from a healthy volunteer. Local displacements estimated along and perpendicular to the ultrasound beam propagation direction are then transformed into radial and circumferential displacements and strains using the polar grid based on a pre-determined centroid location. Lagrangian strain variations demonstrate good agreement with the ideal strain when compared with Eulerian results. Lagrangian radial and circumferential strain estimation results are also demonstrated for experimental data on a healthy volunteer. Lagrangian radial and circumferential strain tracking provide accurate results with the assistance of the polar grid, as demonstrated using both numerical simulations and in vivo study." @default.
• W2336723103 created "2016-06-24" @default.
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• W2336723103 date "2016-08-03" @default.
• W2336723103 modified "2023-09-26" @default.
• W2336723103 title "Segmental Analysis of Cardiac Short-Axis Views Using Lagrangian Radial and Circumferential Strain" @default.
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• W2336723103 doi "https://doi.org/10.1177/0161734615613322" @default.
• W2336723103 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4868801" @default.
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