Nuclear Spins: From Quantum Mechanics to Classical View

GONZALO AGUSTIN ALVAREZ

London

Seminario; Joint Annual Meeting ISMRM-ESMRMB 2022 and the ISMRT 31st Annual Meeting; 2022

International Society for Magnetic Resonance in Medicine (ISMRM)

In this talk, I would introduce the basic physics underlying nuclear magnec resonance. I will present the quantum mechanical descripon vis-à-vis the classical descripon of non-interacng spins in stac (B0) and me-dependent fields (B1). The spin polarizaon and its corresponding thermodynamic equilibrium will be introduced based on the density matrix representaon. The spin state evoluon is dictated by the Liouville–von Neumann equaon that gives the laws on how the spin polarizaon and its coherence evolve as a funcon of me. This quantum equaon of moon arrives at the Bloch equaon.