Patent ID: 6081120
Filing Date: 2000-06-27
Classification: G01R

Abstract:
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.