초록 ▼

A magnetic resonance imaging apparatus (10) includes a primary magnet assembly for generating a temporarily constant magnetic field through an examination region (20), a gradient coil assembly for inducing magnetic field gradients across the examination region (20), and a radio frequency coil for re

A magnetic resonance imaging apparatus (10) includes a primary magnet assembly for generating a temporarily constant magnetic field through an examination region (20), a gradient coil assembly for inducing magnetic field gradients across the examination region (20), and a radio frequency coil for receiving resonance signals from the examination region. The gradient coil assembly includes a coil carrying member (22) carrying first (44) and second (46) spaced apart gradient coil portions which are physically separated from each other on the coil carrying member to define at least one azimuthally directed gap (48, 50, 52, 54) extending along the coil carrying member between said first and second gradient coil portions. The first and second coil portions are disposed towards opposite top and bottom sides of the examination region and have internal windings therein for generating gradient magnetic field components along at least two mutually orthogonal axes (X, Y) in the examination region.

대표청구항 ▼

[ Having thus described the preferred embodiments, the invention is now claimed to be:] [1.] A gradient coil assembly for inducing magnetic field gradients across an examination region in a magnetic resonance imaging apparatus which includes a primary magnet assembly for generating a temporarily con

[ Having thus described the preferred embodiments, the invention is now claimed to be:] [1.] A gradient coil assembly for inducing magnetic field gradients across an examination region in a magnetic resonance imaging apparatus which includes a primary magnet assembly for generating a temporarily constant magnetic field through the examination region, and a radio frequency coil for receiving resonance signals from the examination region, the gradient coil assembly comprising:a coil carrying member carrying first and second spaced apart gradient coil portions which are physically separated from each other on the coil carrying member by at least one azimuthally directed gap having a predetermined arbitrarily selected width extending through the coil carrying member and between said first and second gradient coil portions to define an access port extending along the gradient coil assembly to provide interventional access to a patient while the patient is received within the coil assembly, the first and second coil portions being disposed in the examination region and having internal windings therein for generating gradient magnetic field components along at least two mutually orthogonal axes in the examination region.