Magnitude least squares optimization for parallel radio frequency excitation design demonstrated at 7 tesla with eight channels

Magnetic Resonance in Medicine

Volumn 59, Issue 4, 2008, Pages 908-915

  Setsompop, Kawin ^a,d   Wald, L L ^b,c   Alagappan, V ^b   Gagoski, B A ^a   Adalsteinsson, E ^a,b,c  

^a USA   (United States)

^b HARVARD MEDICAL SCHOOL   (United States)

^c MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

^d NONE   (United States)

Author keywords

Acceleration; Magnitude least squares; Parallel excitation; RF shimming

Indexed keywords

ACCELERATION; DESIGN; ECONOMIC AND SOCIAL EFFECTS; RADIO WAVES; SCANNING;

LEAST SQUARE; LEAST-SQUARES OPTIMIZATION; MAGNETIZATION PROFILE; PARALLEL EXCITATION; RADIO FREQUENCY EXCITATION; RF SHIMMING; SIMULATION STUDIES; SPATIAL PHASE VARIATION;

LEAST SQUARES APPROXIMATIONS;

ARTICLE; COMPARATIVE STUDY; EXCITATION; MAGNETISM; NUCLEAR MAGNETIC RESONANCE IMAGING; NUCLEAR MAGNETIC RESONANCE SCANNER; PERFORMANCE; RADIOFREQUENCY; REGRESSION ANALYSIS; SIMULATION; VALIDATION PROCESS;

EID: 41849141981     PISSN: 07403194     EISSN: 15222594     Source Type: Journal    
DOI: 10.1002/mrm.21513     Document Type: Article

References (22)

1. Setsompop K, Wald LL, Alagappan V, Gagoski B, Hebrank F, Fontius U, Schmitt F, Adalsteinsson E. Parallel RF transmission with eight channels at 3 Tesla. Magn Reson Med 2006;56:1163-1171.
2. Katscher U, Bornert P, Leussler C, van den Brink JS. Transmit SENSE. Magn Reson Med 2003;49:144-150.
3. Zhu Y. Parallel excitation with an array of transmit coils. Magn Reson Med 2004;51:775-784.
4. Griswold M, Kannengiesser S, Muller M, Jakob P. Autocalibrated accelerated parallel excitation (transmit-GRAPPA). In: Proceedings of the 13th Annual Meeting of ISMRM. 2005; Miami Beach, Florida, USA. p. 2435.
5. Grissom W, Yip CY, Zhang Z, Stenger VA, Fessler JA, Noll DC. Spatial domain method for the design of RF pulses in multicoil parallel excitation. Magn Reson Med 2006;56:620-629.
6. Pauly J, Nishimura D, Macovski A. A k-space analysis of small-tip angle excitation. J Magn Reson 1989;81:43-56.
7. Ullmann P, Junge S, Wick M, Seifert F, Ruhm W, Hennig J. Experimental analysis of parallel excitation using dedicated coil setups and simultaneous RF transmission on multiple channels. Magn Reson Mod 2005;54:994-1001.
8. Le Roux P, Gilles RJ, McKinnon GC, Carlier PG. Optimized outer volume suppression for single-shot fast spin-echo cardiac imaging. J Magn Reson Imaging 1998;8:1022-1032.
9. Schricker AA, Pauly JM, Kurhanewicz J, Swanson MG, Vigneron DB. Dualband spectral-spatial RF pulses for prostate MR spectroscopic imaging. Magn Reson Med 2001;46:1079-1087.
10. Mao W, Smith MB, Collins CM. Exploring the limits of RF shimming for high-field MRI of the human head. Magn Reson Med 2006;56:918-922.
11. Collins CM, Liu W, Swift BJ, Smith MB. Combination of optimized transmit arrays and some receive array reconstruction methods can yield homogeneous images at very high frequencies. Magn Reson Med 2005;54:1327-1332.
12. Vaughan T, DelaBarre L, Snyder C, Tian J, Akgun C, Shrivastava D, Liu W, Olson C, Adriany G, Strupp J, Andersen P, Gopinath A, van de Moortele PF, Garwood M, Ugurbil K. 9.4T human MRI: preliminary results. Magn Reson Med 2006;56:1274-1282.
13. Ibrahim TS, Lee R, Baertlein BA, Abduljalil AM, Zhu H, Robitaille PM. Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator. Magn Reson Imaging 2001;19:1339-1347.
14. Park JY, DelaBarre L, Garwood M. Improved gradient-echo 3D magnetic resonance imaging using pseudo-echoes created by frequency-swept pulses. Magn Reson Med 2006;55:848-857.
15. Kassakian PW. Convex approximation and optimization with applications in magnitude filter design and radiation pattern synthesis: University of California at Berkeley; 2006.
16. Saekho S, Yip CY, Noll DC, Boada FE, Stenger VA. Fast-kz three-dimensional tailored radiofrequency pulse for reduced B1 inhomogeneity. Magn Reson Med 2006;55:719-724.
17. Katscher U, Vernickel P, Graesslin I, Boernert P. RF shimming using a mult-element transmit system in phantom and in vivo studies. In: Proceedings of the 15th Annual Meeting of ISMRM, Berlin, Germany, 2007. p. 1693.
18. Kerr AB, Zhu Y, Pauly JM. Phase constraint relaxation in parallel excitation pulse design. In: Proceedings of the 15th Annual Meeting of ISMRM, Berlin, Germany, 2007. p 1694.
19. 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.
20. Alagappan V, Adalsteinsson E, Setsompop K, Fontius U, Zelinski AC, Wiggins GC, Hebrank F, Schmitt F, Wald LL. Comparison of three transmit arrays for parallel transmit. In: Proceedings of the 15th Annual Meeting of ISMRM, Berlin, Germany, 2007. p. 35.
21. Tropp J. Reciprocity and gyrotropism in magnetic resonance transduction. Phys Rev A 2006;74:062103.
22. Haacke EM, Brown RW, Thompson MR, Venkatesan R. Magnetic resonance imaging: physical principles and sequence design. New York: Wiley-Liss; 1999.