메뉴 건너뛰기




Volumn 50, Issue 22, 2005, Pages 5281-5291

A theoretical comparison of two optimization methods for radiofrequency drive schemes in high frequency MRI resonators

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTER SIMULATION; MATHEMATICAL MODELS; MATRIX ALGEBRA; OPTIMIZATION; RESONATORS; SENSITIVITY ANALYSIS;

EID: 27644503224     PISSN: 00319155     EISSN: 00319155     Source Type: Journal    
DOI: 10.1088/0031-9155/50/22/005     Document Type: Article
Times cited : (13)

References (36)
  • 2
    • 28044459877 scopus 로고
    • A perfectly matched layer for the absorption of electromagnetic waves
    • Berenger J 1994 A perfectly matched layer for the absorption of electromagnetic waves J. Comput. Phys. 114 185-200
    • (1994) J. Comput. Phys. , vol.114 , pp. 185-200
    • Berenger, J.1
  • 3
    • 0033296256 scopus 로고    scopus 로고
    • A subspace, interior, and conjugate gradient method for large-scale bound-constrained minimization problems
    • Branch M N, Coleman T F and Li Y 1999 A subspace, interior, and conjugate gradient method for large-scale bound-constrained minimization problems SIAM J. Sci. Comput. 21 1-23
    • (1999) SIAM J. Sci. Comput. , vol.21 , pp. 1-23
    • Branch, M.N.1    Coleman, T.F.2    Li, Y.3
  • 4
    • 3142535158 scopus 로고    scopus 로고
    • Reduction of wave phenomena in high-field MRI experiments using absorbing layers
    • Caserta J, Beck B L and Fitzsimmons J R 2004 Reduction of wave phenomena in high-field MRI experiments using absorbing layers J. Magn. Reson. 169 187-95
    • (2004) J. Magn. Reson. , vol.169 , pp. 187-195
    • Caserta, J.1    Beck, B.L.2    Fitzsimmons, J.R.3
  • 5
    • 18444401717 scopus 로고    scopus 로고
    • Birdcage builder: Design of specified-geometry birdcage coils with desired current pattern and resonant frequency
    • Chin C, Collins C M, Li S, Dardzinski B J and Smith M B 2002 Birdcage builder: design of specified-geometry birdcage coils with desired current pattern and resonant frequency Concepts Magn. Reson. 15 156-63
    • (2002) Concepts Magn. Reson. , vol.15 , pp. 156-163
    • Chin, C.1    Collins, C.M.2    Li, S.3    Dardzinski, B.J.4    Smith, M.B.5
  • 6
    • 27644476616 scopus 로고    scopus 로고
    • Strengths and limitations of pulsing coils in an array sequentially to avoid RF interference in high field MRI
    • Collins C M, Beck B L, Fitzsimmons J R, Blackband S J and Smith M B 2005 Strengths and limitations of pulsing coils in an array sequentially to avoid RF interference in high field MRI Proc. ISMRM p 816
    • (2005) Proc. ISMRM , pp. 816
    • Collins, C.M.1    Beck, B.L.2    Fitzsimmons, J.R.3    Blackband, S.J.4    Smith, M.B.5
  • 7
    • 0032252606 scopus 로고    scopus 로고
    • SAR and B1 field distributions in a heterogeneous human head model within a birdcage coil
    • Collins C M, Li S and Smith M B 1998 SAR and B1 field distributions in a heterogeneous human head model within a birdcage coil Magn. Reson. Med. 40 847-56
    • (1998) Magn. Reson. Med. , vol.40 , pp. 847-856
    • Collins, C.M.1    Li, S.2    Smith, M.B.3
  • 8
    • 0000657246 scopus 로고    scopus 로고
    • A method for accurate calculation of B1 fields in three dimensions effects of shield geometry on field strength and homogeneity in the birdcage coil
    • Collins C M, Li S,, Yang Q X and Smith M B 1997 A method for accurate calculation of B1 fields in three dimensions effects of shield geometry on field strength and homogeneity in the birdcage coil J. Magn. Reson. 125 233-41
    • (1997) J. Magn. Reson. , vol.125 , pp. 233-241
    • Collins, C.M.1    Li, S.2    Yang, Q.X.3    Smith, M.B.4
  • 9
    • 27644437236 scopus 로고    scopus 로고
    • Optimal multiple-element driving configuration depends on head geometry, placement, and volume of interest
    • Collins C M, Swift B J, Liu W, Vaughan J T, Ugurbil K and Smith M B 2004 Optimal multiple-element driving configuration depends on head geometry, placement, and volume of interest Proc. ISMRM p 1556
    • (2004) Proc. ISMRM , pp. 1556
    • Collins, C.M.1    Swift, B.J.2    Liu, W.3    Vaughan, J.T.4    Ugurbil, K.5    Smith, M.B.6
  • 10
    • 18444402761 scopus 로고    scopus 로고
    • Current density mapping approach for design of clinical magnetic resonance imaging magnets
    • Crozier S, Zhao H W and Doddrell D M 2002 Current density mapping approach for design of clinical magnetic resonance imaging magnets Concepts Magn. Reson. 15 208-15
    • (2002) Concepts Magn. Reson. , vol.15 , pp. 208-215
    • Crozier, S.1    Zhao, H.W.2    Doddrell, D.M.3
  • 13
    • 84907101316 scopus 로고
    • Using the L-curve for determining optimal regularization parameters
    • Engl H W and Grever W 1994 Using the L-curve for determining optimal regularization parameters Numer. Math. 69 25-31
    • (1994) Numer. Math. , vol.69 , pp. 25-31
    • Engl, H.W.1    Grever, W.2
  • 14
    • 4444347816 scopus 로고    scopus 로고
    • Novel target-field method tor designing shielded biplanar shim and gradient coils
    • Forbes L K and Crozier S 2004 Novel target-field method tor designing shielded biplanar shim and gradient coils IEEE Trans. Magn. 40 1929-38
    • (2004) IEEE Trans. Magn. , vol.40 , pp. 1929-1938
    • Forbes, L.K.1    Crozier, S.2
  • 15
    • 0030244610 scopus 로고    scopus 로고
    • An analysis and optimization of elliptical RF probes used in magnetic resonance imaging
    • Forbes L K, Crozier S and Doddrell D M 1996 An analysis and optimization of elliptical RF probes used in magnetic resonance imaging Meas. Sci. Technol. 7 1281-90
    • (1996) Meas. Sci. Technol. , vol.7 , pp. 1281-1290
    • Forbes, L.K.1    Crozier, S.2    Doddrell, D.M.3
  • 16
    • 0034405181 scopus 로고    scopus 로고
    • The principle of reciprocity in signal strength calculations - A mathematical guide
    • Hoult D I 2000a The principle of reciprocity in signal strength calculations - a mathematical guide Concepts Magn. Reson. 12 173-87
    • (2000) Concepts Magn. Reson. , vol.12 , pp. 173-187
    • Hoult, D.I.1
  • 17
    • 0033945956 scopus 로고    scopus 로고
    • The sensitivity and power deposition of the high field imaging experiment
    • Hoult D I 2000b The sensitivity and power deposition of the high field imaging experiment J. Magn. Reson. Imaging 12 46-67
    • (2000) J. Magn. Reson. Imaging , vol.12 , pp. 46-67
    • Hoult, D.I.1
  • 18
    • 27644445167 scopus 로고    scopus 로고
    • Optimized whole-body RF coil for imaging applications at 7 Tesla
    • Ibrahim T, Abraham R and Abraham D 2005 Optimized whole-body RF coil for imaging applications at 7 Tesla Proc. ISMRM p 820
    • (2005) Proc. ISMRM , pp. 820
    • Ibrahim, T.1    Abraham, R.2    Abraham, D.3
  • 20
    • 27644550990 scopus 로고    scopus 로고
    • Improved excitation homogeneity at high frequencies with RF pulses of time varying spatial characteristics
    • Ledden P J 2004 Improved excitation homogeneity at high frequencies with RF pulses of time varying spatial characteristics Proc. ISMRM p 38
    • (2004) Proc. ISMRM , pp. 38
    • Ledden, P.J.1
  • 21
    • 19544387778 scopus 로고    scopus 로고
    • Focused, eight-element transceive phased array coil for parallel magnetic resonance imaging of the chest-theoretical considerations
    • Li B K, Liu F and Crozier S 2005a Focused, eight-element transceive phased array coil for parallel magnetic resonance imaging of the chest-theoretical considerations Magn. Reson. Med. 53 1251-7
    • (2005) Magn. Reson. Med. , vol.53 , pp. 1251-1257
    • Li, B.K.1    Liu, F.2    Crozier, S.3
  • 22
    • 27644516848 scopus 로고    scopus 로고
    • A novel method in ameliorating signal voids for 11 T brain imaging using transmission phase cycled, transceive array coils
    • Li B K, Xu B, Crozier S and Liu F 2005b A novel method in ameliorating signal voids for 11 T brain imaging using transmission phase cycled, transceive array coils Proc. ISMRM p 2753
    • (2005) Proc. ISMRM , pp. 2753
    • Li, B.K.1    Xu, B.2    Crozier, S.3    Liu, F.4
  • 23
    • 0031003251 scopus 로고    scopus 로고
    • A method to create an optimum current distribution and homogeneous B-1 field for elliptical birdcage coils
    • Li S, Collins C M, Dardzinski B J, Chin C and Smith M B 1997 A method to create an optimum current distribution and homogeneous B-1 field for elliptical birdcage coils Magn. Reson. Med. 37 600-8
    • (1997) Magn. Reson. Med. , vol.37 , pp. 600-608
    • Li, S.1    Collins, C.M.2    Dardzinski, B.J.3    Chin, C.4    Smith, M.B.5
  • 25
    • 2942579258 scopus 로고    scopus 로고
    • Electromagnetic fields inside a lossy, multilayered spherical head phantom excited by MRI coils: Models and methods
    • Liu F and Crozier S 2004 Electromagnetic fields inside a lossy, multilayered spherical head phantom excited by MRI coils: models and methods Phys. Med. Biol. 49 1835-51
    • (2004) Phys. Med. Biol. , vol.49 , pp. 1835-1851
    • Liu, F.1    Crozier, S.2
  • 26
    • 33846914225 scopus 로고    scopus 로고
    • Using the STIR optimization method to determine the optimal rung drives for resonators in high field head MRI
    • Liu F, Crozier S, Trakic A, Xu B, Li B K and Wei Q 2005b Using the STIR optimization method to determine the optimal rung drives for resonators in high field head MRI Proc. ISMRM p 2750
    • (2005) Proc. ISMRM , pp. 2750
    • Liu, F.1    Crozier, S.2    Trakic, A.3    Xu, B.4    Li, B.K.5    Wei, Q.6
  • 29
    • 1242352263 scopus 로고    scopus 로고
    • 2-D full wave solution for the analysis and design of birdcage coils
    • Spence D K and Wright S M 2003 2-D full wave solution for the analysis and design of birdcage coils Concepts Magn. Reson. 18 15-23
    • (2003) Concepts Magn. Reson. , vol.18 , pp. 15-23
    • Spence, D.K.1    Wright, S.M.2
  • 32
    • 12744278243 scopus 로고    scopus 로고
    • Numerical evaluation of the thermal behavior of a rat model inside high frequency MRI RF coils
    • Tiakic A, Liu F and Crozier S 2004 Numerical evaluation of the thermal behavior of a rat model inside high frequency MRI RF coils Phys. Med. Biol. 49 5547-58
    • (2004) Phys. Med. Biol. , vol.49 , pp. 5547-5558
    • Tiakic, A.1    Liu, F.2    Crozier, S.3
  • 33
    • 27644594164 scopus 로고    scopus 로고
    • RF image optimization at 7 T & 9.4 T
    • Vaughan J T et al 2005 RF image optimization at 7 T & 9.4 T Proc. ISMRM p 953
    • (2005) Proc. ISMRM , pp. 953
    • Vaughan, J.T.1
  • 34
    • 11344249938 scopus 로고    scopus 로고
    • An object-oriented designed finite-difference time-domain simulator for electromagnetic analysis and design in MRI-applications to high field analyses
    • Wei Q, Liu F, Xia L and Crozier S 2005 An object-oriented designed finite-difference time-domain simulator for electromagnetic analysis and design in MRI-applications to high field analyses J. Magn. Reson. 172 222-30
    • (2005) J. Magn. Reson. , vol.172 , pp. 222-230
    • Wei, Q.1    Liu, F.2    Xia, L.3    Crozier, S.4
  • 35
    • 18544386828 scopus 로고    scopus 로고
    • Full-wave analysis of planar radiofrequency coils and coil arrays with assumed current distribution
    • Wright S M 2002 full-wave analysis of planar radiofrequency coils and coil arrays with assumed current distribution Concepts Magn. Reson. 15 2-14
    • (2002) Concepts Magn. Reson. , vol.15 , pp. 2-14
    • Wright, S.M.1
  • 36
    • 26844541700 scopus 로고    scopus 로고
    • An inverse methodology for high frequency RF coil design for MRI with de-emphasized B1 fields
    • Xu B, Wei Q, Liu F and Crozier S 2005 An inverse methodology for high frequency RF coil design for MRI with de-emphasized B1 fields IEEE Trans. Biomed. Eng. 52 1582-7
    • (2005) IEEE Trans. Biomed. Eng. , vol.52 , pp. 1582-1587
    • Xu, B.1    Wei, Q.2    Liu, F.3    Crozier, S.4


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.