Magnetic resonance imaging apparatus including a bird-cage r.f.

Details Magnetic resonance imaging apparatus including a bird-cage r.f. Magnetic resonance imaging apparatus including a bird-cage r.f.

1986-08-01

1988-04-12

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

333219, G01R 3320

Patent

active

047377186

ABSTRACT:
Disclosed is a magnetic resonance imaging apparatus, with an r.f. coil which is designed on the basis of the sinusoidal current distribution across a circular-cylindrical surface about a central coil axis and which is, subject to a generally applicable looping-through condition z.sub.1 =-K z.sub.2, when K is a positive constant which depends on the number of bars and geometrical deviations, z.sub.1 is the impedance of the bar conductors, and z.sub.2 is the impedance of ring conductor elements between each two pair of bar conductors. The coil based on the above condition is particularly adapted to parasitic capacitances of the bar conductors and to the general shape of objects to be examined.

REFERENCES:
patent: 4591818 (1986-05-01), Butson
patent: 4638253 (1987-01-01), Jaskolski et al.

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