New FOCI pulses with reduced radiofrequency power requirements

Journal of Magnetic Resonance Imaging

Volumn 20, Issue 3, 2004, Pages 531-537

  Shen, Jun ^a   Chen, Zhengguang ^a   Yang, Jehoon ^a  

^a NATIONAL INSTITUTE OF MENTAL HEALTH   (United States)

Author keywords

Adiabaticity; RF power deposition; RF pulse; Spin echo imaging

Indexed keywords

ARTICLE; CALCULATION; EXCITATION; FREQUENCY OFFSET CORRECTED INVERSION PULSE; IMAGING SYSTEM; IN VIVO STUDY; MATHEMATICAL ANALYSIS; POWER SPECTRUM; PRIORITY JOURNAL; RADIATION ABSORPTION; RADIATION PHYSICS; RADIOFREQUENCY; VARIABLE RATE SELECTIVE EXCITATION;

ANIMALS; BRAIN; MAGNETIC RESONANCE IMAGING; RADIO WAVES; RATS;

EID: 4344685477     PISSN: 10531807     EISSN: None     Source Type: Journal    
DOI: 10.1002/jmri.20134     Document Type: Article

References (15)

1. Ordidge RJ, Wylezinska M, Hugg JW, Butterworth E, Franconi F. Frequency offset corrected inversion (FOCI) pulses for use in localized spectroscopy, Magn Reson Med 1996;36:562-566.
2. Silver MS, Joseph RI, Hoult DI. Selective spin inversion in nuclear magnetic resonance and coherent optics through an exact solution of the Bloch-Riccati equations. Phys Rev A 1985;31:2753-2755.
3. Payne GS, Leach MO. Implementation and evaluation of frequency offset corrected inversion (FOCI) pulses on a clinical MR system. Magn Reson Med 1997;38:828-833.
4. Kim SG. Quantification of relative cerebral blood flow change by flow-sensitive alternating inversion recovery (FAIR) technique: application to functional mapping. Magn Reson Med 1995:34:293-301.
5. Yongbi MN, Branch CA, Helpern JA. Perfusion imaging using FOCI RF pulses. Magn Reson Med 1998;40:938-943.
6. Yongbi MN, Yang Y, Frank JA, Duyn JH. Multislice perfusion imaging in human brain using the C-FOCI inversion pulse: comparison with hyperbolic secant. Magn Reson Med 1999:42:1098-1105.
7. Conolly S, Glover G, Nishimura D, Macovski A. A reduced power selective adiabatic spin-echo pulse sequence. Magn Reson Med 1991;18:28-38.
8. Conolly S, Nishimura D, Macovski A. Variable-rate selective excitation. J Magn Reson 1988:78:440-458.
9. Shen J. Use of amplitude and frequency transformations to generate adiabatic pulses of wide bandwidth and low RF power deposition. J Magn Reson B 1996;112:131-140.
10. Shen J, Rothman DL. Adiabatic slice-selective excitation for surface coils, J Magn Reson 1997;24:72-79.
11. Shen J, Rothman DL, Hetherington HP, Pan JW. Linear projection method for automatic slice shimming, Magn Reson Med 1999;42:1082-1088.
12. 0 inhomogeneity in the rat brain at 11.7 Tesla. Magn Reson Imaging 2004:22:835-842.
13. Frahm J, Bruhn H, Gyngell ML, Merboldt KD, Hanicke W, Sauter R. Localized high-resolution proton NMR spectroscopy using stimulated echoes: initial applications to human brain in vivo. Magn Reson Med 1989:9:79-93.
14. Pauly J, Le Roux P, Nishimura D, Macovski A. Parameter relations for the Shinnar-Le Roux selective excitation pulse design algorithm. IEEE Trans Med Imaging 1991;10:53-65.
15. Mao J, Mareci TH, Andrew ER. Experimental study of the optimal selective 180 degree radiofrequency pulses. J Magn Reson 1988;79:1-10.