A new procedure for measuring the effective transverse relaxation time T^*₂ in the presence of radiation damping is proposed here. After the amplitude of the echo obtained by CPMG pulse sequence is largely decayed by the intrinsic T₂ relaxation process, its linewidth is no longer broadened by the radiation da

mping effect and thus a good measure of the true value of T^*₂ is possible. Accordingly, for the damped case, the T^*₂ and T₂ can in fact be simultaneously determined in a CPMG spin-echo experiment. In addition, when the saturation recovery experiment was utilized to measure T^*₂, the small-flip-angle pulse must be applied to detect the signals.

T*₂, Radiation damping, CPMG, Saturation reco