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- W3048775403 abstract "The modeling of the diffusion MRI signal from moving and deforming organs such as the heart is challenging due to significant motion and deformation of the imaged medium during the signal acquisition. Recently, a mathematical formulation of the Bloch-Torrey equation, describing the complex transverse magnetization due to diffusion-encoding magnetic field gradients, was developed to account for the motion and deformation. In that work, the motivation was to cancel the effect of the motion and deformation in the MRI image and the space scale of interest spans multiple voxels. In the present work, we adapt the mathematical equation to study the diffusion MRI signal at the much smaller scale of biological cells. We start with the Bloch-Torrey equation defined on a cell that is moving and deforming and linearize the equation around the magnitude of the diffusion-encoding gradient. The result is a second order signal model in which the linear term gives the imaginary part of the diffusion MRI signal and the quadratic term gives the apparent diffusion coefficient (ADC) attributable to the biological cell. We numerically validate this model for a variety of motions and deformations." @default.
- W3048775403 created "2020-08-18" @default.
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- W3048775403 date "2020-09-01" @default.
- W3048775403 modified "2023-10-18" @default.
- W3048775403 title "Apparent diffusion coefficient measured by diffusion MRI of moving and deforming domains" @default.
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- W3048775403 doi "https://doi.org/10.1016/j.jmr.2020.106809" @default.
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