Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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A Effectiveness of Multi-Transmit Parallel Technique on Magnetic Resonance Imaging of FOV Less Than 26cm

자기공명영상검사 시 26cm 이하 영상영역의 Multi-Transmit 기법의 유용성

  • 손순룡 (서울아산병원 영상의학과) ;
  • 최관우 (서울아산병원 영상의학과) ;
  • 박경진 (서울아산병원 영상의학과) ;
  • 이종석 (원광보건대학교 방사선과) ;
  • 유병규 (원광보건대학교 방사선과)
  • Received : 2015.10.13
  • Accepted : 2015.12.21
  • Published : 2015.12.31
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Abstract

The purpose of this study was to prospectively estimate the effectiveness of multi-transmit parallel technique in reduced FOV(Field of View) less than 26 cm. Homogeneity, SNR(signal to noise ratio) and acquisition time were measured and compared by setting FOV less than 26cm on the T1 and T2 weighted images using ACR phantom. The multi-transmit parallel technique resulted in significantly faster image acquisition by 46.8 % in T1 weighted images and 18.9% in T2 weighted images. The homogeneity and SNR values had no significant difference between pre and post application of the multi-transmit parallel technique. In conclusion, this study demonstrates the feasibility of multi-transmit parallel technique in FOV less than 26cm with a rapid acquisition and maintained image quality.

본 연구는 유전체 효과를 줄이기 위해 26cm 영상영역 이상에서 사용하고 있는 Multi-transmit 기법을 26cm 이하에 적용하여 유용성을 알아보고자 하였다. 연구방법은 ACR 팬텀에 26cm 이하의 영상영역을 설정한 후, Multi-transmit 기법 적용 전 후 T1, T2강조영상의 균일도와 신호 대 잡음비, 영상획득시간을 비교하였다. 연구결과, 영상의 균일도와 SNR은 적용 후 유의한 차이가 없었으며, 영상획득시간은 적용 전에 비해, T1강조영상에서 46.8%, T2강조영상에서 18.9% 감소하였다. 결론적으로 Multi-transmit 기법을 26cm 이하의 얇은 부위에 적용하면, 영상의 질은 유지하면서 영상획득시간을 획기적으로 줄일 수 있어 임상적용에 유용하리라 사료된다.

Keywords

References

  1. Son. C. H. : 3.0 Tesla MR Clinical Application, Advanced Neuroimaging, Medical Postgraduates 33(2), 194, 94-100, 2005
  2. Kim. H. J. Son. H. W, Cho. Y. K, Yoo. H. S, : B1+ Homogenizaion over Whole Field of View in High Field MRI, The journal of Korea Electromagnetic Engineering Society, 23(1), 96-100, 2012 https://doi.org/10.5515/KJKIEES.2012.23.1.096
  3. Jerrolds, J. Keene. S. : MRI Safety at 3T versus 1.5 T, Internet Journal of Radiology, 11(1), 2010
  4. Schick, F. : Whole-body MRI at high field, technical limits and clinical potential, Eur Radiol. 15(5), 946-959. 2005 https://doi.org/10.1007/s00330-005-2678-0
  5. Brink WM1, van der Jagt AM, Versluis MJ, Verbist BM, Webb AG. : High permittivity dielectric pads improve high spatial resolution magnetic resonance imaging of the inner ear at 7 T, Invest Radiol. 49(5), 271-277, 2014 https://doi.org/10.1097/RLI.0000000000000026
  6. Mihara, H, Iriguchi, N. Ueno, S : Imaging of the dielectric resonance effect in high field magnetic resonance imaging, Journal of Applied Physics, 97(10), 10R 305-310R 305-303, 2005
  7. Terry Duggan-Jahns. : The Evolution of Magnetic Resonance Imaging, 3T MRI in Clinical Applications, Erad imaging, 2008
  8. Katscher, U. Lisinski J, Brnert P. : RF encoding using a multi-element parallel transmit system, Magn Reson Med. 63(6), 1463-1470, 2010 https://doi.org/10.1002/mrm.22439
  9. Graesslin I1, Homann H, Biederer S, Brnert P, Nehrke K, Vernickel P, Mens G, Harvey P, Katscher U. : A specific absorption rate prediction concept for parallel transmission MR, Magn Reson Med, 68(5), 1664-1674. 2012 https://doi.org/10.1002/mrm.24138
  10. Van den Bergen B1, Stolk CC, Berg JB, Lagendijk JJ, Van den Berg CA. : Ultra fast electromagnetic field computations for RF multi-transmit techniques in high field MRI, Phys Med Biol. 54(5), 1253-64, 2009 https://doi.org/10.1088/0031-9155/54/5/010
  11. Willinek WA1, Gieseke J, Kukuk GM, Nelles M, KBnig R, Morakkabati-Spitz N, TrBber F, Thomas D, Kuhl CK, Schild HH. : Dual-Source Parallel Radiofrequency Excitation Body MR Imaging Compared with Standard MR Imaging at 3.0T, Radiology. 256(3), 966-975. 2010 https://doi.org/10.1148/radiol.10092127
  12. G. M. Kukuk, J. Gieseke, M. Nelles ,R. KBnig, M. Andersson, E. Muschler ,P. MBrtz, J. Stout, M. Nijenhuis, F. TrBber, N. Morakkabati-Spitz, D. Thomas, C. K. Kuhl, H. H. Schild, : Clinical liver MRI at 3.0 Tesla using parallel RF transmission with patient-adaptive B1 shimming. Proc, Intl. Soc. Mag. Reson. Med., 2009
  13. Nelles M, KBnig RS, Gieseke J, Guerand-van Battum MM, Kukuk GM, Schild HH, Willinek WA. : Dual-Source Parallel RF Transmission for Clinical MR Imaging of the Spine at 3.0 T, Intraindividual Comparison with Conventional Single-Source Transmission, Radiology 257(3), 743-753, 2010 https://doi.org/10.1148/radiol.10092146
  14. Rahbar H, Partridge SC, Demartini WB, Gutierrez RL, Parsian S, Lehman CD. : Improved B1 homogeneity of 3 Tesla breast MRI using dual-source parallel radiofrequency excitation, J Magn Reson Imaging, 35(5), 1222-1226, 2012 https://doi.org/10.1002/jmri.23571
  15. W. Wei, G. Jia, D. C. Flanigan, C. C. Kaeding, S. Sammet, P. A. Wassenaar, and M. V. Knopp. : Simultaneous MRI acquisition of Both Knee Joints with Multitransmit Technology at 3T, Proc. Intl. Soc. Mag. Reson. Med. 2011
  16. Jia H, Wang C, Wang G, Qu L, Chen W, Chan Q, Zhao B. : Impact of 3.0 T Cardiac MR Imaging Using Dual-Source Parallel Radiofrequency Transmission with Patient-Adaptive B1 Shimming, PLoS ONE, 8(6), 2013
  17. Yoo KH, : Common Hip Diseases and Their Imaging Studies, J Korean Orthop US Soc 1(1), 40-49, 2008
  18. Panych LP, Chiou JG, Qin L, Kimbrell VL, Bussolari L, Mulkern RV, : On replacing the manual measurement of ACR phantom images performed by MRI technologists with an automated measurement approach, J Magn Reson Imaging. 2015
  19. Escobedo EM, Hunter JC, Zink-Brody GC, WilsonAJ, Harrison SD, Fisher DJ. : Usefulness of turbo spin-echo MR imaging in the evaluation of meniscal tears: compar ison with a conventional spin-echo sequence, AJR Am J Roentgenol. 167(5), 1223-1227. 1996 https://doi.org/10.2214/ajr.167.5.8911185
  20. D. W. McRobbie, E. A. Moore, M. J. Graves, M. R. Prince. : MRI - From Picture to Proton, 2003
  21. Pruessmann KP, Weiger M, Scheidegger MB, Boesiger P, : SENSE: sensitivity encoding for fast MRI, Magn Reson Med. 42(5), 952-962, 1999 https://doi.org/10.1002/(SICI)1522-2594(199911)42:5<952::AID-MRM16>3.0.CO;2-S
  22. Bauer JS, Banerjee S, Henning TD, Krug R, Majumdar S, Link TM. : Fast high-spatial-resolution MRI of the ankle with parallel imaging using GRAPPA at 3 T, AJR Am J Roentgenol. 189(1), 240-245, 2007 https://doi.org/10.2214/AJR.07.2066
  23. Song HK, Wright AC, Wolf RL, Wehrli FW. : Multislice Double Inversion Pulse Sequence for Efficient Black-Blood MRI, Magn Reson Med. 47(3), 616-620, 2002 https://doi.org/10.1002/mrm.10094
  24. Golay X, Gillen J, van Zijl PC, Barker PB. : Scan time reduction in proton magnetic resonance spectroscopic imaging of the human brain, Magn Reson Med. 47(2), 384-387, 2002 https://doi.org/10.1002/mrm.10038