RF excitation using Time Interleaved Acquisition of Modes (TIAMO) to address B1 inhomogeneity in high-field MRI

Magnetic Resonance in Medicine

Volumn 64, Issue 2, 2010, Pages 327-333

  Orzada, Stephan ^a,b   Maderwald, Stefan ^a,b   Poser, Benedikt Andreas ^a,c   Bitz, Andreas K ^a,b   Quick, Harald H ^a,d   Ladd, Mark E ^a,b  

^a UNIVERSITY OF DUISBURG ESSEN   (Germany)

^b UNIVERSITY HOSPITAL ESSEN   (Germany)

^c RADBOUD UNIVERSITY NIJMEGEN   (Netherlands)

^d UNIVERSITY OF ERLANGEN NUREMBERG   (Germany)

Author keywords

7 Tesla; Body imaging; Parallel transmission; Ultra high field

Indexed keywords

7 TESLAS; BODY IMAGING; FIELD INHOMOGENEITY; FIELD STRENGTHS; OPERATIONAL FREQUENCY; PARALLEL TRANSMISSION; TIME-INTERLEAVED; ULTRA-HIGH FIELDS;

ARTICLE; HUMAN; HUMAN EXPERIMENT; MALE; NORMAL HUMAN; NUCLEAR MAGNETIC RESONANCE IMAGING; RADIOFREQUENCY; RADIOLOGICAL PARAMETERS; SIGNAL NOISE RATIO; TIME INTERLEAVED ACQUISITION OF MODES; WHOLE BODY IMAGING;

EID: 77955119110     PISSN: 07403194     EISSN: 15222594     Source Type: Journal    
DOI: 10.1002/mrm.22527     Document Type: Article

References (22)

1. Hoult DI, Phil D. Sensitivity and power deposition in a high-field imaging experiment. J Magn Reson Imaging 2000;12:46-67. (Pubitemid 30437264)
2. Van de Moortele PF, Akgun C, Adriany G, Moeller S, Ritter J, Collins CM, Smith MB, Vaughan JT, Ugurbil K. B(1) destructive interferences and spatial phase patterns at 7 T with a head transceiver array coil. Magn Reson Med 2005;54:1503-1518.
3. 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. (Pubitemid 41740761)
4. 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. (Pubitemid 44477676)
5. 1+ shimming for prostate imaging with transceiver arrays at 7T based on subject-dependent transmit phase measurements. Magn Reson Med 2008;59:396-409.
6. Katscher U, Bornert P, Leussler C, van den Brink JS. Transmit SENSE. Magn Reson Med 2003;49:144-150.
7. 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.
8. Griswold MA, Jakob PM, Heidemann RM, Nittka M, Jellus V, Wang J, Kiefer B, Haase A. Generalized autocalibrating partially parallel acquisitions (GRAPPA). Magn Reson Med 2002;47:1202-1210.
9. Pauly J, Nishimura D, Macovski A. A k-space analysis of small-tip-angle excitation. J Magn Reson 1989;81:43-56.
10. Bitz AK, Brote I, Orzada S, Kraff O, Maderwald S, Quick HH, Yazdanbakhsh P, Solbach K, Bahr A, Bolz T, Wicklow K, Schmitt F, Ladd ME. An 8-channel add-on RF shimming system for whole-body 7 Tesla MRI including real-time SAR monitoring. In: Proceedings of the 17th Annual Meeting of ISMRM. Honolulu, HI: 2009. Abstract 4767.
11. 1 shimming in 7T MRI. In: Proceedings of the 17th Annual Meeting of ISMRM. Honolulu, HI: 2009. Abstract 4768.
12. Wiggins GC, Kraff O, Zakszewski E, Alagappan V, Wiggins CJ, Wald LL. A 7 Tesla gradient mode birdcage coil for improved temporal and occipital lobe SNR. In: Proceedings of the 14th Annual Meeting of ISMRM. Seattle, WA: 2006. Abstract 214.
13. Orzada S, Kraff O, Schäfer LC, Brote I, Bahr A, Bolz T, Maderwald S, Ladd ME, Bitz AK. 8-Channel transmit/receive head coil for 7 T human imaging using intrinsically decoupled strip line elements with meanders. In: Proceedings of the 17th Annual Meeting of ISMRM. Honolulu, HI: 2009. Abstract 3010.
14. Orzada S, Quick HH, Ladd ME, Bahr A, Bolz T, Yazdanbakhsh P, Solbach K, Bitz AK. A flexible 8-channel transmit/receive body coil for 7 T human imaging. In: Proceedings of the 17th Annual Meeting of ISMRM. Honolulu, HI: 2009. Abstract 2999.
15. Price RR, Axel L, Morgan T, Newman R, Perman W, Schneiders N, Selikson M, Wood M, Thomas SR. Quality assurance methods and phantoms for magnetic resonance imaging: report of AAPM nuclear magnetic resonance Task Group No. 1. Med Phys 1990;17: 287-295.
16. Pruessmann KP, Weiger M, Scheidegger MB, Boesiger P. SENSE: sensitivity encoding for fast MRI. Magn Reson Med 1999;42:952-962. (Pubitemid 29521486)
17. Akoka S, Franconi F, Seguin F, Le Pape A. Radiofrequency map of an NMR coil by imaging. Magn Reson Imaging 1993;11:437-441.
18. Firbank MJ, Coulthard A, Harrison RM, Williams ED. A comparison of two methods for measuring the signal to noise ratio on MR images. Phys Med Biol 1999;44:N261-N264.
19. Christ A, Kainz W, Hahn EG, Honegger K, Zefferer M, Neufeld E, Rascher W, Janka R, Bautz W, Chen J, Kiefer B, Schmitt P, Hollenbach HP, Shen J, Oberle M, Szczerba D, Kam A, Guag JW, Kuster N. The virtual family: development of surface-based anatomical models of two adults and two children for dosimetric simulations. Phys Med Biol 2010;55:N23-N38.
20. Butler J, Lowe R. Beam forming matrix simplifies design of electronically scanned antennas. Electron Design 1961;9:170.
21. Yazdanbakhsh P, Bitz AK, Orzada S, Kraff O, Ladd ME, Solbach K. Planar butler matrix technology for 7 Tesla MRI. In: Proceedings of the 17th Annual Meeting of ISMRM. Honolulu, HI: 2009. Abstract 3018.
22. Alagappan V, Nistler J, Adalsteinsson E, Setsompop K, Fontius U, Zelinski A, Vester M, Wiggins GC, Hebrank F, Renz W, Schmitt F, Wald LL. Degenerate mode band-pass birdcage coil for accelerated parallel excitation. Magn Reson Med 2007;57:1148-1158.