Ge Medical Systems Global Technology Company, LLC

General Electric Corporation Gmbh

Rory John Warner

Yuri Lvovsky

Piotr Marian Starewicz

Peter John Feenan

William F B Punchard

An apparatus for magnetic resonance imaging having a magnetic assembly with a main magnet, a shielding system positioned outside the main magnet, and a first and second space for positioning the imaged and non-imaged extremity. Various apparatus with distinct vessels and casings are described with a magnetic assembly and ferromagnetic shielding systems. In yet a further aspect, an apparatus for resonance imaging having additional shim elements for compensating effects from non-axisymmetrical shape of ferromagnetic shielding casing is disclosed. Additionally, an apparatus for magnetic resonance imaging is described having a dedicated space outside the imaging region and where the dedicated space has support element for resting non-image extremity as part of the structure of the imager.

Apparatus for positioning a non-imaged extremity during a magnetic imaging process

An imaging system is provided comprising an imaging magnet having a magnet bore . A plurality of passive shims is positioned within the magnet bore . A plurality of resistive shims is also positioned within the magnet bore . A plurality of thermometers is coupled thermally to a select number of the plurality of passive shims and read a passive shim temperature . A controller is in communication with the plurality of thermometers and the plurality of resistive shims . The controller includes logic adapted to adjust control currents sent to each of the plurality of resistive shims in response to the resistive shim temperatures received from each of the thermometers such that the strength of the magnetic field and its homogeneity is maintained.

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Oxford, United Kingdom

Rory John Warner