Susceptibility-Induced Increase of Apparent Diffusion Coefficient: BOLD Effect Behind Diffusion FMRI

Keywords

accumulating activation agreement almost always analytical anisotropic anisotropy apparent applied behind bold bottom boundary brain calculations called capillary cast cell characteristic coefficient conditions confounded considered conversely convolution created decrease decreased depending determined deviation diffuse diffusion diffusivity displacement early effective effectively eigenvalues either elementary enhanced enhancing equation explicit expressions fast field find finite frequency generalizations genuine geometry gradient gradients hence heterogeneous hopping increasing induced inertia inherent inherently interference isotropic lattice lead length locally magnitude measured medical medium microscopic miller molecular moving narrow native nearly network neuronal numerical numerically objects occur offset opposite orientation origins paramagnetic particular percent periodic picture polarity populations possesses potential predicted prescribed presence presumes probing profile pulse pulses quantitative quantitatively radiology radius random rationalizing recognized refocused refocusing regime relate scale school selection sign simulated simulations situation space spins spots starting step straightforward sufficient suggestive surface susceptibility tensor theoretically tissue tracking twice typical unrestricted variable varies variety vessels volume walker