Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Analysis of MR relaxivity of SPION clusters. (a) MR images of the phantom model prepared with SPIONs, spherical clusters, and worm-like clusters dispersed in water. (b) MR relaxivity of SPION clusters. The T2 molar relaxivity of worm-like clusters was slightly higher than that of spherical clusters; however, resultant differences in contrast capability at given Fe concentrations were minimal. Error bars represent standard deviation of the fit parameter.
