A numerical postprocessing procedure for analyzing radio frequency MRI coils

Concepts in Magnetic Resonance Part A: Bridging Education and Research

Volumn 38 A, Issue 4, 2011, Pages 133-147

  Lemdiasov, Rostislav A ^a   Obi, Aghogho A ^b   Ludwig, Reinhold ^b  

^a Insight Neuroimaging Systems   (United States)

^b Worcester Polytechnic Institute   (United States)

Author keywords

Coil design approach; Computational modeling; G factor; Power loss mechanism; SAR; SNR

Indexed keywords

EID: 79960822694     PISSN: 15466086     EISSN: 15525023     Source Type: Journal    
DOI: 10.1002/cmr.a.20217     Document Type: Article

References (27)

1. Chen J, Feng Z, Jin J-M. 1998. Numerical simulation of SAR and B1-field inhomogeneity of shielded RF coils loaded with the human head. IEEE Trans Biomed Eng 45: 650-659.
2. Jiao D, Jin J-M. 1999. Fast frequency-sweep analysis of RF coils for MRI. IEEE Trans Biomed Eng 46: 1387-1390.
3. Reza S, Vijayakumar S, Limkeman M, Huang F, Saylor C. 2007. SAR simulation and the effect of mode coupling in a birdcage resonator. Conc Magn Reson Part B: Magn Reson Eng 31: 133-139.
4. Ibrahim TS, Lee R, Baertlein BA, Abduljalil AM, Zhu H, Robitaille P-ML. 2001. Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator. Magn Reson Imaging 19: 1339-1347.
5. Ibrahim TS, Lee R, Abduljalil AM, Baertlein BA, Robitaille P-ML. 2001. Dielectric resonances and B1 field inhomogeneity in UHFMRI: computational analysis and experimental findings. Magn Reson Imaging 19: 219-226.
6. Liu W, Collins CM, Smith MB. 2005. 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 29: 5-18.
7. Liu W, Collins CM, Delp PJ, Smith MB. 2004. Effects of end-ring/shield configuration on homogeneity and signal-to-noise ratio in a birdcage-type coil loaded with a human head. Magn Reson Med 51: 217-221.
8. Kozlov M, Turner R. 2009. Fast MRI coil analysis based on 3-D electromagnetic and RF circuit co-simulation. J Magn Reson 200: 147-152.
9. Kozlov M, Turner R. 2010. A comparison of Ansoft HFSS and CST Microwave Studio simulation software for multi-channel coil design and SAR estimation at 7 T MRI. PIERS Online 4: 395-399.
10. Seo JH, Heo HY, Han BH, Lee SY. 2007. Comparison of birdcage and phase array coil using FDTD for the B1 homogeneity in high field MRI. In: Proceedings of the 29th Annual International Conference of the IEEE EMBS, Cité Internationale, Lyon, France.
11. Roemer PB, Edelstein WA, Hayes CE, Souza SP, Mueller OM. 1990. The NMR phased array. Magn Reson Med 16: 192-225.
12. Wright SM, Wald LL. 1997. Theory and application of array coils in MR spectroscopy. NMR Biomed 10: 394-410.
13. Rojas R, Rodríguez AO. 2007. Numerical study of the SNR and SAR of MRI coil arrays. In: Proceedings of the 29th Annual International Conference of the IEEE EMBS Cité Internationale, Lyon, France, August 23-26.
14. Lemdiasov RA, Ludwig R, Bogdanov G. 2009. Procedure for RF coil array analysis using the method of moments. Proc Int Soc Magn Reson Med 17.
15. Obi AA, Lemdiasov R, Ludwig R, Bogdanov G. 2007. Modeling loaded RF coils using the method of moments. Proc Int Soc Magn Reson Med 15.
16. Paska J, Froehlich J, Brunner DO, Pruessmann KP, Vahldieck R. 2009. Field superposition method for RF coil design. Proc Int Soc Magn Reson Med 17.
17. Zhang R, Xing Y, Nistler J, Wang J. 2009. Field and S-parameter simulation of arbitrary antenna structure with variable lumped elements. Proc Int Soc Magn Reson Med 17.
18. Pruessmann KP, Weiger M, Scheidegger MB, Boesiger P. 1999. SENSE: sensitivity encoding for fast MRI. Magn Reson Med 42: 952-962.
19. Ludwig R, Bogdanov G. 2008. RF Circuit Design, Theory and Practice, 2nd ed.Engelwood, NJ: Prentice Hall.
20. Pozar DM. 2004. Microwave Engineering, 3rd ed. New York, NY: Wiley.
21. Vaughan T, Garvood M, Ugurbil K. 2001. Volume coils for highest field MRI. Antennas Propag Soc Int Symp 1.
22. Collins CM, Yang QX, Wang JH, Zhang X, Liu H, Michaeli S, et al. 2002. Different excitation and reception distributions with a single-loop transmit-receive surface coil near a head-sized spherical phantom at 300 MHz. Magn Reson Med 47: 1026-1028.
23. Yang QX, Wang J, Zhang X, Collins CM, Smith MB, Liu H, et al. 2002. Analysis of wave behavior in lossy dielectric samples at high field. Magn Reson Med 47: 982-989.
24. Collins CM, Liu W, Swift BJ, Smith MB. 2005. Combination of optimized transmit arrays and some receive array reconstruction methods can yield homogeneous images at very high frequencies. Magn Reson Med 54: 1327-1332.
25. Collins CM, Smith MB. 2001. 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 45: 684-691.
26. Weiger M, Pruessmann KP, Boesiger P. 2000. Cardiac real-time imaging using SENSE. Magn Reson Med 43: 177-184.
27. Weiger M, Pruessmann KP, Leussler C, Röschmann P, Boesiger P. 2001. Specific coil design for SENSE: a six-element cardiac array. Magn Reson Med 45: 495-504.