QUANTITATIVE INTERPRETATION OF MAGNETIZATION-TRANSFER

被引:605
作者
HENKELMAN, RM
HUANG, XM
XIANG, QS
STANISZ, GJ
SWANSON, SD
BRONSKILL, MJ
机构
[1] UNIV TORONTO,DEPT MED BIOPHYS,TORONTO M5S 1A1,ONTARIO,CANADA
[2] UNIV TORONTO,DEPT RADIOL,TORONTO M5S 1A1,ONTARIO,CANADA
[3] UNIV MICHIGAN,DEPT RADIOL,ANN ARBOR,MI 48109
关键词
MAGNETIC TRANSFER;
D O I
10.1002/mrm.1910290607
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Magnetization transfer contrast (MTC) experiments using off-resonance irradiation have been performed with an agar gel model by systematically varying offset frequency, amplitude of the RF irradiation and gel concentration. The experimental results are shown to be quantitatively modelled by a two-pool system consisting of a liquid pool with a Lorentzian line shape and a small semisolid pool with a Gaussian lineshape. The fitted model yields physically realistic fundamental parameters with a T2 of the semisolid pool of 13 mus. Further analysis shows that the off-resonance irradiation MTC experiment has significant limitations in its ability to saturate the semisolid pool without directly affecting the liquid component.
引用
收藏
页码:759 / 766
页数:8
相关论文
共 36 条
[1]  
ABRAGAM A, 1961, PRINCIPLES NUCLEAR M
[2]   NMR LINESHAPES CAUSED BY TRANSVERSE CROSS RELAXATION OF NEARLY LIKE SPINS [J].
ANET, FAL ;
OLEARY, DJ .
JOURNAL OF MAGNETIC RESONANCE, 1990, 86 (02) :358-370
[3]   THE EFFECTS OF MORPHOLOGY AND EXCHANGE ON PROTON NMR RELAXATION IN AGAROSE GELS [J].
BELTON, PS ;
HILLS, BP ;
RAIMBAUD, ER .
MOLECULAR PHYSICS, 1988, 63 (05) :825-842
[4]   THE MAGNETIC-FIELD DEPENDENCE OF PROTON SPIN RELAXATION IN TISSUES [J].
BRYANT, RG ;
MENDELSON, DA ;
LESTER, CC .
MAGNETIC RESONANCE IN MEDICINE, 1991, 21 (01) :117-126
[5]   INCORPORATION OF MAGNETIZATION TRANSFER INTO THE FORMALISM FOR ROTATING-FRAME SPIN-LATTICE PROTON NMR RELAXATION IN THE PRESENCE OF AN OFF-RESONANCE-IRRADIATION FIELD [J].
CAINES, GH ;
SCHLEICH, T ;
RYDZEWSKI, JM .
JOURNAL OF MAGNETIC RESONANCE, 1991, 95 (03) :558-566
[6]   THE LOSS OF SMALL OBJECTS IN VARIABLE TE IMAGING - IMPLICATIONS FOR FSE, RARE, AND EPI [J].
CONSTABLE, RT ;
GORE, JC .
MAGNETIC RESONANCE IN MEDICINE, 1992, 28 (01) :9-24
[7]   INCIDENTAL MAGNETIZATION TRANSFER CONTRAST IN STANDARD MULTISLICE IMAGING [J].
DIXON, WT ;
ENGELS, H ;
CASTILLO, M ;
SARDASHTI, M .
MAGNETIC RESONANCE IMAGING, 1990, 8 (04) :417-422
[8]  
EDZES HT, 1978, J MAGN RESON, V31, P207, DOI 10.1016/0022-2364(78)90185-3
[9]   CROSS RELAXATION AND SPIN DIFFUSION IN PROTON NMR OF HYDRATED COLLAGEN [J].
EDZES, HT ;
SAMULSKI, ET .
NATURE, 1977, 265 (5594) :521-523
[10]   QUANTITATIVE H-1 MAGNETIZATION TRANSFER IMAGING INVIVO [J].
ENG, J ;
CECKLER, TL ;
BALABAN, RS .
MAGNETIC RESONANCE IN MEDICINE, 1991, 17 (02) :304-314