The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Compressed B1 Control Method in Multi-channel 3 T MRI

다채널 3T 자기공명장치에서의 Compressed B1 제어법

  • Received : 2013.06.14
  • Accepted : 2013.07.19
  • Published : 2013.08.01
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Abstract

Our objective of this study was to reduce radio frequency coil (RF) control time at 3 T MRI systems. A compressed method is proposed with a convex optimization and pseudo-inverse method in multi-channel RF coils. After applying the proposed methods, fields are homogenized with less field data. Even with 80% compression, the fields are well homogenized and localized, indicating that mapping requires only 20% of the original data. Detailed values are compared between each compressed result in and outside the region of interest at 3 T.

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References

  1. J. Vaughan, M. Garwood, C.M. Collins, W. Liu, L. DelaBarre, G. Adriany, P. Andersen, H. Merkle, R. Goebel, M.B. Smith, and K. Ugurbil, "7T vs. 4T: RF power, homogeneity, and signal-to-noise comparison in head images," Magn Reson Med, vol. 46, no. 1, pp. 24-30, 2001. https://doi.org/10.1002/mrm.1156
  2. J. Vaughan, L. DelaBarre, C. Snyder, J. Tian, C. Akgun, D. Shrivastava, W. Liu, C. Olson, G. Adriany, J. Strupp, P. Anderson, A. Gopinath, and P. Moortele, "9.4 T human MRI: Preliminary results," Magn. Reson.Med., vol. 56, pp. 1274-1282, 2006 https://doi.org/10.1002/mrm.21073
  3. H. Yoo, A. Gopinath, and J. T. Vaughan, "A method to localize RF B1 field in high-field magnetic resonance imaging systems," IEEE Trans. Biomed. Eng., 2012, 59, no.12, pp.3365-3371 https://doi.org/10.1109/TBME.2012.2208965
  4. D. Brunner and K. Pruessmann, " interferometry for the calibration of RF transmitter arrays," Magn. Reson. Med., vol. 61, pp. 1480-1488, 2009 https://doi.org/10.1002/mrm.21893
  5. M. Lustig, D. Donoho, J. Santos, and J. Pauly, "Compressed sensing MRI," IEEE Signal Process. Mag., vol. 25, no. 2, pp. 72-82, Mar. 2008. https://doi.org/10.1109/MSP.2007.914728
  6. SEMCAD X by SPEAG, www.speag.com