"Shim pulses" for NMR spectroscopy and imaging.
A way to use adiabatic radiofrequency pulses and modulated magnetic-field gradient pulses, together constituting a "shim pulse," for NMR spectroscopy and imaging is demonstrated. These pulses capitalize on phase shifts derived from probe gradient coils to compensate for nonlinear intrinsic main magnetic field homogeneity for spectroscopy, as well as for deviations from linear gradients for imaging. This approach opens up the possibility of exploiting cheaper, less-than-perfect magnets and gradient coils for NMR applications.
Topgaard
Daniel
D
Materials Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory and Department of Chemistry, University of California, Berkeley, CA 94720, USA. daniel.topguard@fkem1.lu.se
Martin
Rachel W
RW
Sakellariou
Dimitris
D
Meriles
Carlos A
CA
Pines
Alexander
A