Array-optimized composite pulse for excellent whole-brain homogeneity in high-field MRI

Magnetic Resonance in Medicine

Volumn 57, Issue 3, 2007, Pages 470-474

  Collins, Christopher M ^a,c   Wang, Zhangwei ^a   Mao, Weihua ^a   Fang, Jieming ^a   Liu, Wanzhan ^b   Smith, Michael B ^a  

^a PENN STATE COLLEGE OF MEDICINE   (United States)

^b UNIVERSITY OF MINNESOTA   (United States)

^c NMR/MRI Building ^*  (United States)

Author keywords

B1; Composite pulse; High field; MRI; RF shimming

Indexed keywords

COMPOSITE PULSE; CURRENT DISTRIBUTION; FIELD DISTRIBUTION; HIGH FIELD; HOMOGENEOUS DISTRIBUTION; OPTIMIZED COMPOSITES; RADIO-FREQUENCY COIL; RF SHIMMING;

MAGNETIC RESONANCE IMAGING;

ARTICLE; BRAIN SIZE; IMAGE QUALITY; MAGNETIC FIELD; NEUROIMAGING; NUCLEAR MAGNETIC RESONANCE IMAGING; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; RADIATION ABSORPTION; RADIATION DOSE DISTRIBUTION; RADIOFREQUENCY; WAVEFORM;

EID: 33847718735     PISSN: 07403194     EISSN: 15222594     Source Type: Journal    
DOI: 10.1002/mrm.21172     Document Type: Article

References (24)

1. Hoult DI. Sensitivity and power deposition in a high-field imaging experiment. J Magn Reson Imaging 2000;12:46-67.
2. Ibrahim TS, Lee R, Robitaille PML. Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator. Magn Reson Imaging 2001;19:1339-1347.
3. Vaughan JT, DelaBarre L, Snyder C, Tian J, Bolan P, Garwood M, Adriany G, Strupp J, Andersen P, van de Moortele P-F. Ugurbil K. Highest field human imaging. In: Proceedings of the 17th International Zurich Symposium on Electromagnetic Compatibility, Singapore, 2006. p 26-29.
4. Pauly JM, Hu BS, Wang SJ, Nishimura DG, Macovski A. A three-dimensional spin-echo or inversion pulse. Magn Reson Med 1993;29:2-6.
5. Stenger VA, Boada FE, Noll DC. Multishot 3D slice-select tailored RF pulses for MRI. Magn Reson Med 2002;48:157-165.
6. Saekho S, Boada FE, Noll DC, Stenger VA. Small tip angle 3D tailored radiofrequency slab-select pulse for reduced B1 inhomogeneity at 3 T. Magn Reson Med 2005;53:479-484.
7. Katscher U, Bornert P, Leussler C, van den Brink JS. Transmit SENSE. Magn Reson Med 2003;49:144-150.
8. Ullmann P, Junge S, Wick M, Ruhm W, Hennig J. Experimental verification of transmit SENSE with simultaneous RF-transimssion on multiple channels. In: Proceedings of the 13th Annual Meeting of the ISMRM, Miami Beach, FL, USA, 2005 (Abstract 15).
9. Ledden P, Cheng Y. Improved excitation homogeneity at high frequencies with RF pulses of time varying spatial characteristics. In: Proceedings of the 12th Annual Meeting of ISMRM, Kyoto, Japan, 2004 (Abstract 38).
10. Collins CM, Beck BL, Fitzsimmons JR, Blackband SJ, Smith MB. Strengths and limitations of pulsing coils in an array sequentially to avoid RF interference in high field MRI. In: Proceedings of the 13th Annual Meeting of ISMRM, Miami Beach, FL, USA, 2005 (Abstract 816).
11. Levitt MH, Freeman R. NMR population inversion using a composite pulse. J Magn Reson 1979;33:473-476.
12. Thesen S, Krueger G, Mueller E. Compensation of dielectric resonance effects by means of composite excitation pulses. In: Proceedings of the 11th Annual Meeting of ISMRM, Toronto, Canada, 2003 (Abstract 715).
13. Collins CM, Smith MB. Signal-to-noise ratio and absorbed power as functions of main magnetic field strength and definition of "90°" RF pulse for the head in the birdcage coil. Magn Reson Med 2001;45:684-691.
14. Collins CM, Liu W, Swift BJ, Smith MB. Combination of optimized transmit arrays and some parallel imaging reconstruction methods can yield homogeneous images at very high frequencies. Magn Reson Med 2005;54:1327-1332.
15. Adriany G, Van de Moortele PF, Wiesinger F, Moeller S, Strupp JP, Andersen P, Snyder C, Zhang X, Chen W, Pruessmann KP, Boesiger P, Vaughan T, Ugurbil K. Transmit and receive transmission line arrays for 7 Tesla parallel imaging. Magn Reson Med 2005;53:434-45.
16. Gabriel C. Compilation of the dielectric properties of body tissues at RF and microwave frequencies. Brooks Air Force Base. TX: Air Force Materiel Command: 1996.
17. DelaBarre L, Snyder CJ, Ugurbil K, Vaughan JT. Aparallel transceiver for human imaging at 9.4T. In: Proceedings of the 14th Annual Meeting of ISMRM, Seattle, WA, USA, 2006 (Abstract 130).
18. Chen Y, Young K, Schleich T, Matson GB. Frequency selective RF pulses for multislice MRI with modest immunity to B1 inhomogeneity and to resonance offset. In: Proceedings of the 11th Annual Meeting of ISMRM, Kyoto, Japan, 2004 (Abstract 2652).
19. Shen J. Composite slice-selective 90° excitation pulses with adiabicity. In: Proceedings of the 10th Annual Meeting of ISMRM, Toronto, Canada, 2003 (Abstract 2498).
20. + excitation while minimizing SAR hotspots for phase amplitude controlled high field MRI using a hyperthermia treatment planning system and realistic patient anatomies. In: Proceedings of the 17th International Zurich Symposium on Electromagnetic Compatibility. Singapore, 2006. p 11-14.
21. Liu W, Collins CM, Smith MB. Calculations of B1 distribution, specific energy absorption rate, and intrinsic signal-to-noise ratio for a body-size birdcage coil loaded with different human subjects at 64 and 128 MHz. Appl Magn Reson 2005;29:5-18.
22. Collins CM, Swift BJ, Liu W, Vaughan JT, Ugurbil K, Smith MB. Optimal multiple-element driving configuration depends on head geometry, placement, and volume of interest. In: Proceedings of the 12th Annual Meeting of ISMRM, Kyoto, Japan, 2004 (Abstract 1566).
23. Smith MB, Yang QX, Collins CM, Beck BL, Padgett KR, Grant SC, Duensing GR, Smith R, Blackband SJ. Human head imaging at 11 Tesla. In: Proceedings of the 13th Annual Meeting of ISMRM, Miami Beach, FL, USA, 2005 (Abstract 925).
24. Li BK, Xu B, Liu F, Crozier S. Multiple-acquisition parallel imaging combined with a transceive array for the amelioration of high-field RF distortion: a modeling study. Concept Magn Reson B 2006;29:95-105.