Abstract
A novel method for mapping the longitudinal relaxation time in a clinically acceptable time is developed based on a recent proposal [J.-J. Hsu, I.J. Lowe, Spin-lattice relaxation and a fast T1-map acquisition method in MRI with transient-state magnetization, J. Magn. Reson. 169 (2004) 270-278] and the speed of the spiral pulse sequence. The method acquires multiple curve-fitting samples with one RF pulse train. It does not require RF pulses of specific flip angles (e.g., 90 degrees or 180 degrees ), nor are the long recovery waiting time and the measurement of the magnetization at thermal equilibrium needed. Given the value of the flip angle, the curve fitting is semi-logarithmic and not computationally intensive. On a heterogeneous phantom, the average percentage difference between measurements of the present method and those of an inversion-recovery method is below 2.7%. In mapping the human brain, the present method, for example, can obtain four curve-fitting samples for five 128 x 128 slices in less than 3.2s and the results are in agreement with other studies in the literature.
References
Feb 1, 1992·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·L D DiesbourgB O'Neill
Apr 1, 1989·Radiology·R K BregerV M Haughton
Sep 1, 1994·Journal of Magnetic Resonance Imaging : JMRI·C Y Tong, F S Prato
Oct 1, 1995·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D P Madio, I J Lowe
Jan 1, 1997·Magnetic Resonance Imaging·S ChoR G Steen
Mar 14, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G H Glover, S Lai
Apr 16, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D P MadioI J Lowe
Aug 4, 1998·IEEE Transactions on Medical Imaging·Z ChenC McKenzie
Oct 15, 1998·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·H M Gach, I J Lowe
Nov 12, 1998·Magnetic Resonance Imaging·A J FreemanP Mansfield
Mar 21, 2000·Magnetic Resonance Imaging·C A McKenzieD J Drost
Nov 8, 2001·NeuroImage·N J ShahK Zilles
Jan 26, 2002·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jung-Jiin Hsu, Irving J Lowe
Jun 20, 2003·Journal of Magnetic Resonance Imaging : JMRI·Yoshiyuki IshimoriHarumi Itoh
Jul 25, 2003·Magnetic Resonance Imaging·Michael PellerMaximilian Reiser
Oct 28, 2003·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·Nadim Joni ShahKarl Zilles
Nov 25, 2003·Journal of Magnetic Resonance Imaging : JMRI·Marianne A A van WalderveenFrederik Barkhof
Apr 6, 2004·Magnetic Resonance Imaging·R Grant SteenJohn Haselgrove
Jul 21, 2004·Journal of Magnetic Resonance·Jung-Jiin Hsu, Irving J Lowe
Citations
Mar 10, 2009·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jung-Jiin HsuGary H Glover
Sep 26, 2009·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jung-Jiin HsuGreg Zaharchuk
Oct 29, 2008·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Christine S LawGary H Glover
Aug 27, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Timo LiimatainenShalom Michaeli
Jan 29, 2011·Journal of Magnetic Resonance Imaging : JMRI·Warren D FoltzCynthia Ménard
Aug 15, 2006·Journal of Magnetic Resonance·Jung-Jiin Hsu, Irving J Lowe
Nov 1, 2011·NeuroImage·Gary H Glover