Open AccessMulti-exponential inversion of T2 spectrum in NMR based on differential evolution algorithm
Author(s) -
Kejia Pan,
Hua Chen,
Tan Ya
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5956
Subject(s) - inversion (geology) , exponential function , differential evolution , algorithm , computer science , relaxation (psychology) , nuclear magnetic resonance , physics , mathematics , mathematical analysis , paleontology , structural basin , biology , psychology , social psychology
A new multi-exponential inversion method for NMR relaxation signals is presented and tested, which is based on differential evolution (DE) algorithm. The inversion of T2 spectrum in NMR is reduced to a non-negative constraint optimization problem, and solved directly by DE algorithm without pre-assigning the distribution of relaxation time T2. The validity and effectiveness of our method is demonstrated by computer simulations and the inversion of practical NMR data under low SNR.