Imaging of the B1 distribution and background signal in a MAS NMR probehead using inhomogeneous B0 and B1 fields

- Inhomogeneous B0 and B1 fields used to image B1 field distribution in MAS probehead.
- Method can be applied on any MAS NMR probe as B0 gradient generated by linear z shim.
- Approach allows background signal and sample to be spatially resolved.
- Method is used to assess performance of “depth” sequences for background suppression.