Magnetic resonance methods and apparatus

Details Magnetic resonance methods and apparatus Magnetic resonance methods and apparatus

1989-06-29

1991-12-10

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01R 3320

Patent

active

050721844

ABSTRACT:
A coil (17) for use as a surface r.f. coil in magnetic resonance apparatus comprising a conductor (25) wound helically to form a coil of overall laminar form with the parts of the conductor on one main face (29) more closely spaced to one another than are the parts of the conductor on the other main face (31). The coil is used to induce or detect an r.f. field locally in a body under investigation by positioning it with the main face having the more closely spaced conductor parts adjacent the body. The closer spacing improves coupling to the body while allowing the coil to be thinner, and therefore less bulky, than a coil of comparable performance with the same conductor part spacing on both main faces.

REFERENCES:
patent: 4095163 (1978-06-01), Hlavka
patent: 4607226 (1986-08-01), Zeiger
patent: 4714887 (1987-12-01), Meissner et al.
patent: 4793356 (1988-12-01), Misic et al.
patent: 4816765 (1989-03-01), Boskamp
"Planar-pair local coils for high-resolution magnetic resonance imaging, particularly of the temporomandibular joing", Medical Physics, vol. 13(1), Jan./Feb. 1986, pp. 3 to 7; James S. Hyde et al.
"A Surface Coil Geometry with Field Pattern Entirely on X-Y Plane for Optimum Patient Loading:", SMRM Abstracts, Aug. 1987, p. 413; Mehrdad Mehdizadeh, PhD., et al.

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