A whole-body MRI scanner with high-performance gradient system produces loud acoustic noise during scan. In the present study we have evaluated the acoustic noise performance for a new gantry structure aimed at noise reduction with a vacuum chamber insert between the gradient coil cylinder and the patient bore tube cylinder. Two different supporting structures for the bore tube were compared. The method supporting the bore tube by means of a beam structure mounted on the feet of magnet scored better performance than the alternative method supporting it by short brackets mounted at the edges of magnet bore opening.
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