19F spin-lattice relaxation of perfluoropolyethers: Dependence on temperature and magnetic field strength (7.0-14.1Â T)
Keywords: ردیابی سلول; Perfluorocarbons; Spin-lattice relaxation; Fluorine-19 MRI; Cell tracking; 19F MRI; 19F NMR; T1; R1; 19F cellular MRI;