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Electronics for a high temperature superconducting receiver system for magnetic resonance microimaging

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3 Author(s)
Black, R.D. ; Gen. Electr. Corp. Res. & Dev. Center, Schenectady, NY, USA ; Roemer, P.B. ; Mueller, O.M.

Describes an MRI (magnetic resonance imaging) receiver system that incorporates a high temperature superconducting (HTS) resonator as a surface coil. Techniques for measuring the Q of the HTS resonator in a 7 Tesla field are discussed. A method for coupling a room temperature copper resonant circuit to the HTS element is covered, and it is shown that such a coupling scheme preserves the signal-to-noise gain afforded by the HTS coil. A preamplifier with a noise figure of <0.15 dB at 300 MHz is described.

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Biomedical Engineering, IEEE Transactions on  (Volume:41 ,  Issue: 2 )