Origin of the MRI Contrast in Natural and Hydrogel Formulation of Pineapple Juice

Figure 6

(a) ¹H longitudinal relaxivity profiles and transverse relaxivity at 400 MHz (stars) of Mn²⁺ ions in pineapple juice without (black symbols) and with alginate (5%: blue symbols; 15%: red symbols) at 25°C (solid symbols) and 37°C (empty symbols). (b) ¹H longitudinal relaxivity profiles and transverse relaxivity at 400 MHz (stars) of Mn²⁺ solutions without (black symbols) and with alginate (5%: blue symbols; 15%: red symbols) at 25°C (solid symbols) and 37°C (empty symbols). The solid and dotted lines represent the best fit profiles of the longitudinal and transverse relaxivities, respectively.

(a)

(b)