Magnetic resonance imaging device with an active shielding device
AssigneeKoninklijke Philips Electronics N.V.
InventorsNicolaas Roozen, Adrian Toma, Georgo Angelis
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Abstract
The present invention relates to a magnetic resonance imaging (MRI) device. The basic components of an MRI device are the main magnet system, the gradient system, the RF system and the signal processing system. According to the present invention the magnetic resonance imaging device comprises at least one active shielding device (19, 20) assigned to the main magnet system (2), wherein the or each is driven by an electrical current in order to reduce magnetic field penetration inside the main magnet system and to reduce mechanical forces induced in the main magnet
Claims17
A magnetic resonance imaging device, comprising at least:
- a) a main magnet system for generating a steady magnetic field in a measuring space of the magnetic resonance imaging device;
- b) a gradient system comprising gradient coils for generating a magnetic gradient field in said measuring space;
- and
- c) at least one active shielding device assigned to the main magnet systems;
- wherein the or each active shielding device is driven by an electrical current in order to reduce magnetic field penetration inside the main magnet system and to reduce mechanical forces induced in the main magnet system.
Dependencies are inferred from the claim text.