Abstract
A technique, field-focusing NMR (FONAR), is described for doing NMR scans in large samples. The method utilizes a shaped D.C. magnetic field that confines the NMR-signal-producing region of the sample to a small volume called the resonance aperture. The aperture contains the required values of the H o field to fully bracket the band of the r.f. pulse. The magnet system and r.f. pick-up coil that achieved the first human NMR scan is discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Damadian, R.: Science 171, 1151 (1971)
Damadian, R.: U.S. Patent 3,789,832, filed 17 March 1972
Hinshaw, W.S.: J. Appl. Phys. 47, 3709 (1976)
Mansfield, P., Maudsley, A.A.: Brit. J. Radiol. 50, 188 (1977)
Kumar, A., Welti, D., Ernst, R.R..: J. Magn. Res. 18, 69 (1975)
Bené, G.J., et al.: C.R. Hebd. Seances Acad. Sci. Ser. B 284 (8), 141 (1977)
Bloch, F., Hansen, W.W., Packard, M.: Phys. Rev. 70, 474 (1946) Purcell, E.M., Torrey, H.C., Pound, R.V.: ibid. 69, 37 (1946)
Damadian, R., et al.: Science 194, 1430 (1976)
Damadian, R.: Hosp. Prac. 12, 63 (1977)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Damadian, R., Minkoff, L., Goldsmith, M. et al. Field-focusing nuclear magnetic resonance (FONAR). Naturwissenschaften 65, 250–252 (1978). https://doi.org/10.1007/BF00368564
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00368564