Magnetic resonance imaging with integrated poleface features

Details Magnetic resonance imaging with integrated poleface features Magnetic resonance imaging with integrated poleface features

1998-08-28

2000-11-14

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, 335296, G01V 300

Patent

active

061474959

ABSTRACT:
A magnetic resonance imaging scanner includes a pair of opposing pole pieces (20, 20') disposed symmetrically about an imaging volume (24) facing one another. The pair of opposing pole pieces (20, 20') includes a first ferrous pole piece (20) which has a front side (22) facing the imaging volume (24) and a back side (28). Also included is a second ferrous pole piece (20') which also has a front side (22) facing the imaging volume (24) and a back side (28). A magnetic flux return path (30) extends, remotely from the imaging volume (24), between a point adjacent the back side 28 of the first pole piece (20) and a point adjacent the back side 28' of the second pole piece (20)'. A source of magnetic flux generates a magnetic flux through the imaging volume (24), the pair of opposing pole pieces (20, 20'), and the magnetic flux return path (30). An array of annular hoops (40) and (40') are integrated with the pair of opposing pole pieces (20, 20') for homogenizing the magnetic flux through the imaging volume (24). The annular hoops (40, 40') are made of a material having magnetic properties different from those of the pair of opposing pole pieces (20, 20').

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patent: 5627471 (1997-05-01), Kinanen
patent: 5864275 (1999-01-01), Ohashi et al.

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