Figure 1.
(A) Homogeneous phantoms: eight 30-ml tubes filled with demineralized water mixed with increasing gadolinium chelate concentration (Gadoteric Acid; Dotarem®, Guerbet): 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75 and 2 mmol/l and a central demineralized water tube. (B) T1 weighted MRI image of the homogeneous phantom (256x256 matrix, 18 cm FOV). (C, D) T1 weighted MRI image of the heterogeneous phantom (256;256 matrix, 24 cm FOV): in the two central columns are six 30-ml tubes filled with polystyrene beads of different diameters (1, 2 and 3 mm) in an agarose gel solution (2%), either pure or mixed with 0.25 mmol/l gadolinium chelate, and two 30-ml tubes filled with agarose gel solution (2%) and two different concentration of gadolinium chelate.
