Patent ID: 9091743
Filing Date: 2015-07-28
Classification: G01R

Abstract:
1. A local screen for screening out magnetic resonance signals from an object under examination during magnetic resonance imaging with a magnetic resonance device, the local screen comprising: a plurality of local screen elements that are electrically conductive and are arranged such that no direct electrically conductive connection exists between the plurality of local screen elements; a carrier device operable to accommodate the plurality of local screen elements; a plurality of switching devices that are connected in an electrically conductive manner to the plurality of local screen elements, the plurality of switching devices being configured such that electrical resistance of the plurality of switching devices is controllable by a plurality of screen control signals; and a plurality of screen control signal inputs for the plurality of screen control signals, wherein the plurality of local screen elements and the plurality of switching devices are configured such that the local screen exhibits, in a frequency range that comprises a working frequency of the magnetic resonance device, a high screening effect when an electrical resistance of the plurality of switching devices is low, at least during a receiving phase of the magnetic resonance imaging, and a low screening effect when an electrical resistance of the plurality of switching devices is high, at least during an excitation phase of the magnetic resonance imaging.