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FIG 1. Method for calculating the fractal dimension in one representative case each from the AD group, the VaD group, and the control group. {square} indicates AD patient (y = -1.32x + 16.46; r = 0.994); {circ} indicates VaD patient (y = -1.112x + 15.71; r = 0.992); {triangleup} indicates age-matched control (y = -0.767x + 14.55; r = 0.996)