FIG. 1.

Artery (a) and tissue (b) enhancement curves of the digital phantom. The ground truth curves [${\mathcal{I}}_{\text{a}}\left(t\right)$ and $\mathcal{I}\left(t\right)$] were shown as dashed lines. The expected CT signal (〈I_a(t)〉 and 〈I(t)〉) are shown as dash-dotted lines, and a single set of their noisy realizations is also included. WM: white matter; WMSR: white matter with severely reduced blood flow.