RF-coil for MRI apparatus

Details RF-coil for MRI apparatus RF-coil for MRI apparatus

1991-01-04

1993-03-02

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324322, G01V 300

Patent

active

051912899

ABSTRACT:
An RF coil for MRI apparatus is provided which comprises a dielectric unit, such as a bobbin, plurality of coil conductors formed on the outer peripheral surface of the dielectric unit in a mutually adjacent relation to generate a magnetic field, and frame, such as a guard ring, provided on the inner surface of the dielectric unit to define a bobbin portion of the dielectric unit. An accommodation space is provided inside the bobbin to located a living substance to be examined, allowing an RF wave to be transmitted and received to and from the subject in the accommodation space. A plurality of openings are provided in the dielectric unit per se at a location of the bobbin portion. By so doing, it is possible to reduce an induction loss in the bobbin portion which would otherwise be damaging to the electrical function of the RF coil and to obtain an RF coil of an improved Q-factor.

REFERENCES:
patent: 4591818 (1986-05-01), Butson
patent: 4660013 (1987-04-01), Laskaris et al.
patent: 4720680 (1988-01-01), Nishihara et al.
patent: 4725803 (1988-02-01), Prevot et al.
patent: 4875013 (1989-10-01), Murakami et al.

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