Radiofrequency shielding
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Radiofrequency (RF) shielding serves to both prevent external RF interference and ensure RF signals generated by MR imaging do not escape the room.
MRI systems utilise RFelectromagnetic waves to produce the soft tissue contrast characteristic to the modality. Given the ubiquity of similar waves in the external environment, it is crucial that the extremely sensitive detector elements are shielded from this kind of interference so as to avoid image artifact 1.
RFRadiofrequency shields based on the principle of the Faraday cage usually encompass the entire scanning room. While any electrically conducting material can be used as shielding, galvanised steel and copper have been shown to be effective at a reasonable cost 2.
-<p><strong>Radiofrequency (RF) shielding </strong>serves to both prevent external RF interference and ensure RF signals generated by MR imaging do not escape the room. </p><p>MRI systems utilise RF waves to produce the soft tissue contrast characteristic to the modality. Given the ubiquity of similar waves in the external environment, it is crucial that the extremely sensitive detector elements are shielded from this kind of interference so as to avoid image artifact <sup>1</sup>. </p><p>RF shields based on the principle of the <a title="Faraday cage" href="/articles/faraday-cage">Faraday cage</a> usually encompass the entire scanning room. While any electrically conducting material can be used as shielding, galvanised steel and copper have been shown to be effective at a reasonable cost <sup>2</sup>. </p>- +<p><strong>Radiofrequency shielding </strong>serves to both prevent external interference and ensure signals generated by MR imaging do not escape the room. </p><p>MRI systems utilise electromagnetic waves to produce the soft tissue contrast characteristic to the modality. Given the ubiquity of similar waves in the external environment, it is crucial that the extremely sensitive detector elements are shielded from this kind of interference to avoid image artifact <sup>1</sup>. </p><p>Radiofrequency shields based on the principle of the <a href="/articles/faraday-cage">Faraday cage</a> usually encompass the entire scanning room. While any electrically conducting material can be used as shielding, galvanised steel and copper have been shown to be effective at a reasonable cost <sup>2</sup>. </p>
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