Emulsions of perfluorotributylamine (FTBA) and perflubron were evaluat
ed for their utility in F-19 echo planar imaging. Fluorine images of t
he emulsions were obtained in a phantom and two mice that had been pre
dosed. Both agents, but particularly perflubron, show potential for fl
uorine echo planar studies because of the long spin-spin relaxation ti
mes of the CF3 resonances. High resolution thin slice images obtained
in as little as 26.6 ms are presented.