Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1994-02-08
1995-02-28
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324321, G01V 300
Patent
active
053940881
ABSTRACT:
A small sample imaging apparatus replaces the dewar which normally passes along the axis of an NMR imaging probe. The small sample imaging apparatus incorporates an integral RF coil and capacitor resonant circuit. The coil and capacitor are positioned adjacent to each other and remotely at the end of a projecting stalk. Stray inductance effects are thereby avoided and the stalk physically positions the resonant circuit at substantially the properly centered location. The stalk which positions the coil and capacitor may be formed from a length of rigid coaxial cable which carried RF energy to the resonant circuit. When large samples are imaged, the conventional probe coil insert can be utilized in the normal manner. However, when smaller samples are images, the adapter can be attached to the probe and the adaptor resonant circuit can be utilized.
REFERENCES:
patent: 4710719 (1987-12-01), Doty
patent: 4859950 (1989-08-01), Keren
patent: 5045793 (1991-09-01), Rathke
patent: 5153516 (1992-10-01), Gopalsami et al.
Magnetic Resonance in Medicine, vol. 6, No. 1, Jan. 1988, Duluth, Minn., USA, R. C. Lyon et al., "A Versatile Multinuclear Probe Designed for in vivo NMR Spectroscopy: Applications to Subcutaneous Human Tumors in Mice". (pp. 1-14).
Journal of Magnetic Resonance, vol. 60, 1984, Orlando, Minn., USA, (pp. 397-404), P. Styles et al., "A High-Resolution NMR Probe in Which the Coil and Preamplifier are Cooled with Liquid Helium".
Magnetic Resonance in Medicine, vol. 11, No. 2, Aug. 1989, Duluth, Minn., USA, (pp. 209-220), P. Narayan et al., "Transrectal Probe for .sup.1 H MRI and .sup.31 P MR Spectroscopy of the Prostate Gland".
Arana Louis
Bruker Instruments, Inc.
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