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Universal-multi-layered, multi-tuned RF probe for MRI and MRS

  • US 6,081,120 A
  • Filed: 05/20/1998
  • Issued: 06/27/2000
  • Est. Priority Date: 05/20/1998
  • Status: Expired due to Fees
First Claim
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1. A universal multi-layered, multi-tuned RF probe coil, with substantially identical B1 field patterns for multiple nuclei, that operates independently for each nuclide examined, comprising:

  • (a) a thin NMR, MRI and MRS multi-layered, multi-tuned RF probe coil, that operates independently for each nuclide examined and with substantially identical B1 field patterns for multiple nuclei;

    (b) a first fast electronic switch, connected to the coil in series at connection points that switches in 1 nanosecond or less, for controlling the RF coil inductance and changing the resonant frequency;

    (c) an array of tuning capacitors for adjusting the resonant frequency;

    (d) a second fast electronic switch, that switches in 1 nanosecond or less, to select the tuning capacitance from the array of tuning capacitors;

    (e) an array of matching capacitors; and

    (f) a second fast electronic switch, that switches in 1 nanosecond or less, to select the matching capacitance for impedance matching.

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