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T 1 mapping from spin echo and stimulated echoes
Author(s) -
Franconi F.,
Seguin F.,
Sonier C. B.,
Le Pape A.,
Akoka S.
Publication year - 1995
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.597632
Subject(s) - echo (communications protocol) , nuclear magnetic resonance , physics , spin echo , medical imaging , fast spin echo , magnetic resonance imaging , medicine , computer science , radiology , computer network
We present an imaging method to obtain a map of the spin‐lattice relaxation time. Images were acquired with the same spatial resolution and in the same time as for a regular spin‐echo acquisition. The sequence was based on the simultaneous acquisition of a spin echo and several stimulated echoes with the same intensity except for T 1 weighting which increases with the interval between the excitation pulse and the readout pulse. T 1 values obtained on phantoms were compared to those from the inversion‐recovery method and show the accuracy (2%) and the precision (5%) of the method. T 1 images of the brain of a healthy volunteer are presented and demonstrate the ability of the method to obtain T 1 mapping in vivo in 12 min and without susceptibility artifacts. In vivo and in vitro results were compared to those obtained by a TOMROP sequence in the same acquisition time.