| 摘要 |
The NMR apparatus examines an object enclosed within a sensitive volume defined by an RF probe apparatus (16), and has two fluid introduction regulators e.g. mass flow controllers (60,61) and a plenum (62) for mixing the fluids, for maintaining a respective partial concentration of each of the two fluids within the sensitive volume. The first and second fluids respectively have corresp. molar magnetic susceptibilities, where the volume susceptibility of the resulting fluid mixture within the sensitive volume is a linear combination of the molar magnetic susceptibilities and exhibits a desired value, which corresp. substantially to the magnetic susceptibility of a portion of the structural members forming the sensitive volume. |
