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Ultrasound strain imaging has been proposed to quantitatively assess myocardial contractility. Cross-correlation based 2D speckle tracking (ST) and auto-correlation based Doppler tissue imaging (DTI) are competitive ultrasound techniques for this application. Unlike ST, DTI is limited by angle dependency and suffers from low signal-to-noise ratio because a high pulse repetition frequency (PRF) is...
The objective of this study is to validate two-dimensional (2D) myocardial elastography estimates in canine hearts in vivo against direct sonomicrometry measurements at variable levels of myocardial ischemia induced by the occlusion of the left anterior descending (LAD) coronary artery. Two-dimensional myocardial elastography comprised transmural: 1) 2D (lateral and axial) displacements using 1D cross-correlation...
In this paper, we extend a computationally efficient framework for tracking of deformable subdivision surfaces in 3D echocardiography with speckle-tracking measurements to track material points. Tracking is performed in a sequential state-estimation fashion, using an extended Kalman filter to update a subdivision surface in a two-step process: Edge-detection is first performed to update the model...
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