Loading patent…
AssigneeBruker Instruments, Inc.
InventorsDavid G. Cory, Werner E. Maas
Estimating the term…
A composite RF pulse for NMR experiments is created by applying to a sample a radial pulse followed by a .pi. homogeneous pulse. The radial pulse has a uniform RF field strength throughout the sample and a phase relative to the detection coil phase with a spatial dependence such that all possible phase differences are equally represented throughout the sample. The composite pulse converts the radial RF pulse into a spatially-varying z rotation. The creation of a spatially-varying composite z pulse based on a radial pulse allows for a simple and direct application of a radial pulse in a manner analogous to many known B.sub.0 gradient NMR experiments (such as multiple-quantum filters, quadrature detection, and solvent suppression).
A composite RF pulse sequence for use in NMR experiments, which sequence causes a spatially-varying spin rotation about the z-axis when applied to a nuclear spin system in a sample and the resulting NMR signal is observed by means of a detection coil having a receiver phase, the pulse sequence comprising in combination:
In an NMR experiment involving the steps of applying to NMR-active nuclei in a sample a time-invariant magnetic field having a field direction, exciting the NMR-active nuclei and applying RF pulses to the excited NMR-active nuclei to induce nuclear spin rotation, and the resulting NMR signal is observed by means of a detection coil with a phase, a method for generating a spatially-varying nuclear spin rotation about the time-invariant magnetic field direction, the method comprising the steps of:
An NMR experiment comprising the steps of:
Dependencies are inferred from the claim text.