STATIC MAGNETIC FIELD MAGNET AND MAGNETIC RESONANCE IMAGING APPARATUS

To suppress heat generation of a superconducting coil.SOLUTION: A static magnetic field magnet according to one embodiment includes a vacuum container, a radiation shield, a superconducting coil, and a winding frames. The radiation shield is provided inside the vacuum container. The superconducting...

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Bibliographic Details
Main Authors SHIBUYA TAKEHIRO, KAWAMOTO HIROMI, FUHA SADANORI
Format Patent
LanguageEnglish
Japanese
Published 15.03.2024
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
SURGERY
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Summary:To suppress heat generation of a superconducting coil.SOLUTION: A static magnetic field magnet according to one embodiment includes a vacuum container, a radiation shield, a superconducting coil, and a winding frames. The radiation shield is provided inside the vacuum container. The superconducting coil is provided inside the radiation shield and generates a static magnetic field. The winding frames hold the superconducting coil. The winding frames are provided with a heat generation suppressing shield part comprising a skin part and a dermis part which are structurally or functionally separated. The skin part is a part through which an eddy current generated in the winding frame on the gradient coil side flows. The dermis part is a part on the superconducting coil side where the eddy current does not flow.SELECTED DRAWING: Figure 6 【課題】超伝導コイルの発熱抑制を行うこと。【解決手段】一実施形態の静磁場磁石は、真空容器と、輻射シールドと、超伝導コイルと、巻枠とを設ける。輻射シールドは、真空容器の内部に設けられる。超伝導コイルは、輻射シールドの内部に設けられ、静磁場を発生する。巻枠は、超伝導コイルを保持する。巻枠は、構造上分離しているか、又は、機能的に分離している表皮部及び真皮部を備える発熱抑制用シールド部を設ける。表皮部は、傾斜磁場コイル側の巻枠内で発生する渦電流が流れる部分である。真皮部は、超伝導コイル側の渦電流が流れない部分である。【選択図】 図６
Bibliography:Application Number: JP20220140743