Fig. 7.

Relationship between the saturated decorrelation value and channel width at a blood flow speed of $15\mathrm{mm}/\mathrm{s}$. Black squares, red circles, and blue triangles are data points of three different scan sizes, $3.5\times 3.5{\mathrm{mm}}^2$, $5.3\times 5.3{\mathrm{mm}}^2$, and $7\times 7{\mathrm{mm}}^2$, respectively. Black, red, and blue lines show the results of fitting with Eq. (5) for the three different scan size. $D_{\mathrm{sm}}$ is a model parameter that describes the maximum value of $D_{\mathrm{sat}}$.