期刊
MAGNETIC RESONANCE IN MEDICINE
卷 45, 期 4, 页码 720-723出版社
JOHN WILEY & SONS INC
DOI: 10.1002/mrm.1097
关键词
TrueFISP; T-1 quantification; inversion recovery; DEFT; off resonance
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 degrees. 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. (C) 2001 Wiley-Liss, Inc.
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