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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: Magn Reson Imaging. 2018 Aug 10;54:90–100. doi: 10.1016/j.mri.2018.08.003

Figure 1. Illustration of blurring that causes a reduction in the observed radial displacement gradient.

Figure 1.

(A) In the short-axis view, the left ventricle can be approximated as a ring of tissue. The top row contains the magnitude and phase components from a simulated, complex DENSE image. Displacement in the x-direction has been encoded into the phase. The bottom row contains the results of blurring the complex image with a Gaussian filter. The magnitude image is clearly blurred while the differences in the phase image are visually subtle. (B) The prescribed gradient in displacement across the left ventricular wall is shown as the blue line and was taken from the top phase image. The dashed red line is the displacement gradient across the wall in the blurred phase image. There is a clear reduction in the measured displacement gradient (strain) across the wall in the presence of blurring. Endo: endocardial boundary; Epi: epicardial boundary.