Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1984-07-06
1987-12-08
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
335299, G01R 3320
Patent
active
047120681
ABSTRACT:
The invention relates to an RF (=radio frequency) coil arrangement for an NMR examination apparatus, an object or target to be examined, e.g. a patient or part of a patient being adapted to be placed inside said coil arrangement which is adapted to excite the nuclei of a selected target area by transmitting an RF pulse substantially orthogonal to a homogeneous basic magnetic field produced by the apparatus and, thereafter, to receive and detect an NMR signal generated in the target. In order to eliminate the drawbacks of a so-called saddle coil conventionally used as an RF coil the invention is characterized in that it comprises a transfer line, continuous and wired in a manner that its various parts induce an RF field of different direction. Both in excitation and detection of signals, said transfer line can be adapted to process a magnetic field rotating in just one direction and it can be connected as an endless loop. Especially if a plurality of rounds are desired on an RF coil, a preferably and technically readily designable construction can be achieved by entwining the transfer line into a mesh shaped e.g. as a cylinder or a like body of revolution.
REFERENCES:
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patent: 2267613 (1941-11-01), Lindenblad
patent: 2306693 (1942-12-01), Gloss
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patent: 4398149 (1983-08-01), Zens
patent: 4439733 (1984-03-01), Hinshaw
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patent: 4621237 (1986-11-01), Timms
Nucler Magnetic Resonance Imaging in Medicine: Kaufman, 1981, pp. 62-65.
Instrumentarium Corp.
Oldham Scott M.
Tokar Michael J.
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