Abstract
In the past five years a considerable amount of clinical test results have become available from Magnetic Resonance Imaging (MRI) and/or Spectroscopy systems based on superconducting magnets with field strengths up to 4 T. This new technique has now proved to be an important diagnostic tool for physicians. Most of the superconducting magnet systems commercially available today are solenoid type magnets cooled by pool boiling of liquid helium surrounded by a liquid nitrogen cooled radiation shield. At DUT we reconsidered the design of the superconducting magnet and the cooling system to get a system that might be more acceptable for use in a clinical environment. We designed a compact 1.5 T double pair magnet system with low temperature cooling system for: a) two radiation shields, b) precooling of the magnet system to 20 K and c) recondensation of the evaporated helium from the coils. The design and first test results of this system will be discussed.
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References
R. Damadian, Tumor detection by NMR, Science 171: 1151 (1971).
P. A. Bottomley, NMR imaging techniques and applications: A Review, Rev. Sci. Instrum. 53:1319 (1982).
M. A. Foster, “Magnetic Resonance in Medicin and Biology”, Pergamon Press, Oxford, UK (1984).
J. E. C. Williams, Superconducting magnets for MRI, IEEE Trans. Nucl. Sci. NS-31: 994 (1984).
M. F. Wood, I. L. MacDougall, P. M. Winson, Superconducting magnets for NMR imaging and in-vivo spectroscopy in: “Proc. Tenth Intl. Cryo. Engr. Conf.”, Butterworth, Guildford, UK (1984) p. 44.
R. C. Longsworth, Interfacing small closed cycle refrigerators to liquid Helium cryostats, Cryogenics 24: 175 (1984).
K. Pieterman and H. Postma, A 1.5 T superconducting magnet with closed cooling system for spin-imaging: An outline, Cryogenics 24: 59 (1984).
G. Levy et al, Superconducting solenoids for nuclear physics at Orsay, Journal de Physique Colloque Cl, supplément au n°l, 45: C1–821 (1984).
J. Holland, Cold-transfer systems, in: “Proc. Third Intl. Cryo. Engr. Conf.”, Iliffe Science and Technology Publications Ltd, Guildford, UK (1970) p. 255.
H. Sixsmith and P. Giarratano, A miniature centrifugal pump, Rev. Sci. Instrum. 41:1570 (1970).
L. P. Ludwig and T. N. Strom, Mech. Eng. 12: 45 (1969).
G. J. J. v. Heijningen, private communication.
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© 1986 Plenum Press, New York
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Pieterman, K., Dam, J.A.M., Postma, H. (1986). Low Temperature Closed Cooling System for MRI Magnets. In: Fast, R.W. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 31. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2213-9_61
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DOI: https://doi.org/10.1007/978-1-4613-2213-9_61
Publisher Name: Springer, Boston, MA
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