Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1988-10-03
1990-04-24
Williams, Hezron E.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324322, 128653A, G01R 3320
Patent
active
049203185
ABSTRACT:
A resonance exciting coil (C) excites magnetic resonance in nuclei disposed in an image region in which a main magnetic field and transverse gradients have been produced. A flexible receiving coil (D) includes a flexible plastic sheet (40) on which one or more loops (20) are adhered to receive signals from the resonating nuclei. Velcro straps (46) strap the flexible sheet and the attached coil into close conformity with the surface of the portion of the patient to be imaged. An impedance matching or coil resonant frequency adjusting network (50) is mounted on the flexible sheet for selectively adjusting at least one of an impedance match and the peak sensitivity resonant frequency of the receiving coil. A preamplifier (52) amplifies the received signals prior to transmission on a cable (24). A selectively variable voltage source (70) applies a selectively adjustable DC bias voltage to the cable for selectively adjusting at least one of the impedance match and the LC resonant frequency of the receiving coil. The received signals are amplified by an amplifier (82) and processed by an image processor (30) to form man-readable images of the examined region of the patient for display on a video display (32) or the like.
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Holland G. Neil
Hurst Gregory C.
Misic George J.
Orlando Paul T.
Patrick, III John L.
O'Shea Kevin D.
Picker International Inc.
Williams Hezron E.
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