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Abstract #1754

Comparison of patient bore tube supporting structures for a high-performance gradient whole-body MRI system to reduce acoustic noise

Hiromitsu Takamori1, Kaoru Ikeda1, Shoji Ishizaki1, Kazuya Okamoto1, Hitoshi Kanazawa1, and Kazuto Nakabayashi1

1Yokohama Development Center, Toshiba Medical Systems, Yokohama, Japan

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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