T1 recovery and T2 decay

a person sitting on wooden planks across the lake scenery

T1 recovery

  • Once RF is applied, spins move to high energy states. Once RF is removed, they transfer this energy to the lattice, called the spin lattice energy transfer.
  • Slowly the spins magnetic moments move from high energy to low energy state
  • NMV recovers and realigns to external field. This relaxation is called T1 recovery.

T2 decay

  • Refers to NMV decay in the transverse plane
  • Caused due to spin-spin interactions and external field inhomogeneities