University of California

Toshiba America Mri, Inc.

William K Lu

Mitsuaki A Arakawa

Leon Kaufman

Joseph W Carlson

Barry M McCarten

Kevin A Derby

John H Fehn

Stephen Krasnor

Ernesto Zepeda

A nuclear magnetic resonance imaging system is described. The nuclear magnetic resonance imaging system includes an RF transmit device formed as two rectangular coils arranged in planes orthogonal to one another and formed by two U-shaped loops. The U-shaped loops improve B.sub.1 field homogeneity in the vertical direction. The rectangular coils may be used in a four post MRI device to improve access to the body being imaged.

Spatially orthogonal rectangular coil pair suitable for vertical

A matching circuit for a RF coil on an MRI device is disclosed. The matching circuit includes a variable neutralizing inductance on the output side of the matching circuit ground breaker. All variable components are removed from the coil trace board, providing greater access to the tuning components during the MRI operation.

Parasitic compensating matching circuit integral with ground breaker for

A four-post MRI system used in conjunction with a X-wing transmission coil is disclosed in which the post of the system and the upper and lower gradient coil assemblies are covered in a RF reflective material. The covering may be in applied foil such as copper or aluminum, or may be a screen of conductive metal, or may be a spray-on conductive metal.

RF shield for four-post vertical field magnet used for MRI

Pad for a lumbar spine coil for a magnetic resonance imaging device

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San Francisco, CA, United States of America

William K Lu