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American Journal of Roentgenology, Vol 141, Issue 6, 1195-1201
Copyright © 1983 by American Roentgen Ray Society

Articles

Nuclear magnetic resonance imaging: contrast-to-noise ratio as a function of strength of magnetic field

HR Hart Jr, PA Bottomley, WA Edelstein, SG Karr, WM Leue, O Mueller, RW Redington, JF Schenck, LS Smith, and D Vatis

The choice of the strength of the magnetic field for an imaging system based on the nuclear magnetic resonance of hydrogen is considered. It is shown by an analysis based on in vitro data that the quality, or contrast-to-noise ratio, of images based on T1 or T2 discrimination increases with field up to 1.5-2 T. After a brief discussion of potential high-field limitations, results are presented which show that images of the human head with excellent anatomic detail can be produced at 1.5 T or 64 MHz.
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A. J. Maubon, J.-M. Ferru, V. Berger, M. C. Soulage, M. DeGraef, P. Aubas, P. Coupeau, E. Dumont, and J.-P. Rouanet
Effect of Field Strength on MR Images: Comparison of the Same Subject at 0.5, 1.0, and 1.5 T
RadioGraphics, July 1, 1999; 19(4): 1057 - 1067.
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