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

  • 제62권8호
  • /
  • Pages.1120-1124
  • /
  • 2013
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지
DOI QR코드

DOI QR Code

다채널 3T 자기공명장치에서의 Compressed B1 제어법

Compressed B1 Control Method in Multi-channel 3 T MRI

  • 투고 : 2013.06.14
  • 심사 : 2013.07.19
  • 발행 : 2013.08.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

  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