In this paper, we address resonant systems intended to be used with the commercial main resonator present on all NMR or MRI instruments. Both coils are coupled to the same sample region, and thus, are inductively coupled through their common magnetic flux. Secondly, a strongly coupled resonant system allows us to considerably locally improve the magnetic component of the RF near field to provide an efficient nuclear spin magnetization excitation and a high received signal. For both configurations, the behavior of the coils system regarding the amplitude of B1 is addressed. Examples of MRI experiments, as well as workbench evaluations and simulations support the principles exposed here.

Source: The Local October 10, 2024 19:25 UTC