Sensitivity of magnetic resonance imaging based on the detection of 19F NMR signals

The evaluation of the sensitivity of magnetic resonance tomography with a magnetic field of 7 T based on the detection of F-19 NMR signals was performed with the use of the solutions of trifluoroacetic acid, 1,1,1,3,3,3-hexafluoroisopropanol and sym-nonafluoroneopentanol, whose F-19 NMR spectra consist of single line signals. The scanning of a 12x12 cm zone with a resolution of 1.2 mm and a cut thickness of 4 mm for 10 min gave reliable images if the local concentration of F-19 atoms in the test zone exceeded 0.3-0.6%.