Theoretical Evaluation of Magnetization Behavior in PRESS: for Determination of the Spin-Lattice Relaxation Time, T1
In single-voxel magnetic resonance spectroscopy (MRS), the stimulated echo acquisition mode (STEAM) pulse sequence has been widely used, but if a short echo time is unnecessary, the point-resolved spectroscopy (PRESS) pulse sequence has its own advantage that, theoretically, the magnetization is twice that of STEAM, which provides a better signal-to-noise ratio (SNR). This might be helpful in the treatment of a weak signal, but, to our knowledge, there has been no theoretical description of the steady-state magnetization in PRESS. Thus, using the vector model, we derived the equation of magnetization as a function of the echo time (TE) and the repetition time (TR), and we compared the extracted T1 value of a water phantom with the simple exponentially fitted value.
S. Kang et al., "Theoretical Evaluation of Magnetization Behavior in PRESS: for Determination of the Spin-Lattice Relaxation Time, T1," Journal of the Korean Physical Society, Korean Physical Society, Jan 2002.
Mining and Nuclear Engineering
Keywords and Phrases
MRS; PRESS; Spin-Lattice Relaxation Time; Vector Model
Article - Journal
© 2002 Korean Physical Society, All rights reserved.