| 摘要 |
<p>In the known method of obtaining image information representing the distribution of paramagnetic material in solution, which comprises the steps of applying radio-frequency radiation to excite EPR resonance in the solution while obtaining an NMR image signal of selected nuclei of the solvent, thereby to enhance the signal obtained from those selected nuclei which interact with electrons excited by the radio-frequency radiation, the invention provides the improvement of using, as the method of obtaining the NMR image signal, the magnetic field cycling NMR method (in which each cycle includes a polarisation period, an evolution period and a detection period) and performing the EPR resonance excitation during the evolution period (in which the NMR magnetic field is of reduced strength). This enables a low EPR resonance excitation power to be used without requiring a reduction in the signal-to-noise ratio of the NMR image signal obtained.</p> |
