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T 1 quantification with inversion recovery TrueFISP
Author(s) -
Scheffler Klaus,
Hennig Jürgen
Publication year - 2001
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1097
Subject(s) - snapshot (computer storage) , magnetization , inversion (geology) , excitation , nuclear magnetic resonance , flip angle , physics , materials science , computer science , magnetic field , geology , magnetic resonance imaging , medicine , paleontology , quantum mechanics , structural basin , radiology , operating system
A snapshot FLASH sequence can be used to acquire the time course of longitudinal magnetization during its recovery after a single inversion pulse. However, excitation pulses disturb the exponential recovery of longitudinal magnetization and may produce systematic errors in T 1 estimations. In this context the possibility of using the TrueFISP sequence to detect the recovery of longitudinal magnetization for quantitative T 1 measurements was examined. Experiments were performed on different Gd‐doped water phantoms and on humans. T 1 values derived from inversion recovery TrueFISP were in excellent agreement with the single‐point method even for flip angles up to 50°. In terms of T 1 accuracy and SNR, the proposed method seems to be superior to the conventional inversion recovery snapshot FLASH technique. Magn Reson Med 45:720–723, 2001. © 2001 Wiley‐Liss, Inc.