"repetition time (TR): long"
"A T2WI relies upon the transverse relaxation (also known as "spin-spin" relaxation) of the net magnetisation vector (NMV). T2-weighting tends to require long TE and TR times."
"after an RF excitation pulse, there is relaxation of the spins from the transverse plane toward the main longitudinal magnetic vector (B0) - this is T1-weighting"
Expected headings
"Physics"