Patent ID: 7112963
Filing Date: 2006-09-26
Classification: G01R

Abstract:
1. An NMR analysis method comprising the steps of: a) subjecting a sample or specimen to a strong static magnetic field to induce precessional motion to the magnetic moments of atomic nuclei within the sample or specimen; b) applying RF power perpendicularly to the direction of the static magnetic field with an irradiation coil during periods spaced and at an RF frequency to induce precessional motion of the magnetic moments in an excited state; c) detecting an NMR signal released with a detecting coil when precessional motion of the magnetic moments return to a ground state; d) cooling with low temperature fluids the coils used to apply RF power or detect NMR signals in steps b) and c); the improvement comprising: e) during periods complementary to the applying the RF power in step b), applying RF power of a frequency not affecting measurement of the NMR signal, wherein the total amount of RF power applied to the detection coil or the RF irradiation coil is controlled to be almost constant irrespective of whether the RF power of the frequency necessary for the measurement of the NMR signal is applied or not.