The influence of stimulated echoes on contrast in fast spin-echo imaging.
作者： C.F.M. Williams , T.W. Redpath , F.W. Smith
DOI: 10.1016/0730-725X(95)02110-F
关键词:
摘要: Tissue contrast obtained using fast spin-echo (FSE) and conventional (SE) sequences is not identical a number of mechanisms are thought to contribute these differences. The effect stimulated echoes has previously been apparently ruled out as contributing mechanism. Signal-to-noise ratios single-slice matched FSE SE were compared in aqueous solutions CuSO4, Cr2(SO4)3 MnSO4 with various T1 T2 values. Enhancement the signal was observed short greater samples where ratio high. Reducing refocusing pulse flip angle increase contribution from also resulted slightly increased enhancement. Experimental results verified by computer simulations. Our show that do differences between images may be significant imaging brain hemorrhage.
elsevier.com
sci-hub.se 参考文章(22)
R. Hausser, F. Noack, Kernmagnetische Relaxation und Korrelation in Zwei-Spin-Systemen European Physical Journal. ,vol. 182, pp. 93- 110 ,(1964) , 10.1007/BF01387090
Ching-Nien Chen, D. I. Hoult, Biomedical magnetic resonance technology ,(1989)
A. L. Hopkins, H. N. Yeung, C. B. Bratton, Multiple field strengthin vivo T1 andT2 for cerebrospinal fluid protons Magnetic Resonance in Medicine. ,vol. 3, pp. 303- 311 ,(1986) , 10.1002/MRM.1910030214
Val M. Runge, Clinical magnetic resonance imaging Lippincott. ,(1990)
J V Catasca, S A Mirowitz, T2-weighted MR imaging of the abdomen: fast spin-echo vs conventional spin-echo sequences. American Journal of Roentgenology. ,vol. 162, pp. 61- 67 ,(1994) , 10.2214/AJR.162.1.8273691
R Todd Constable, John C Gore, None, The loss of small objects in variable TE imaging: implications for FSE, RARE, and EPI. Magnetic Resonance in Medicine. ,vol. 28, pp. 9- 24 ,(1992) , 10.1002/MRM.1910280103
Jianhui Zhong, John C Gore, Ian M Armitage, None, Relative contributions of chemical exchange and other relaxation mechanisms in protein solutions and tissues Magnetic Resonance in Medicine. ,vol. 11, pp. 295- 308 ,(1989) , 10.1002/MRM.1910110304
Koichi Oshio, Ferenc A. Jolesz, Fast MRI by creating multiple spin echoes in a CPMG sequence. Magnetic Resonance in Medicine. ,vol. 30, pp. 251- 254 ,(1993) , 10.1002/MRM.1910300216
W. A. Edelstein, Paul A. Bottomley, Leah M. Pfeifer, A signal-to-noise calibration procedure for NMR imaging systems Medical Physics. ,vol. 11, pp. 180- 185 ,(1984) , 10.1118/1.595484
Colin S. Poon, Jerzy Szumowski, Donald B. Plewes, Peter Ashby, R.Mark Henkelman, Fat/water quantitation and differential relaxation time measurement using chemical shift imaging technique. Magnetic Resonance Imaging. ,vol. 7, pp. 369- 382 ,(1989) , 10.1016/0730-725X(89)90486-4