Mechanical Structure Design of a 14T Body-Size MRI Magnet

With higher magnetic field, the imaging quality and signal-to-noise ratio of MRI system will be significantly improved. The Institute of Plasma Physics Chinese Academy of Sciences (ASIPP) has announced a project, which is supported by the Chinese Academy of Sinences, to design a 14T MRI magnet with a 900 mm warm bore and comprised of Nb3Sn Rutherford cables, the homogeneity of the magnetic field is better than 0.5 ppm in a 22 cm diameter spherical volume. This paper is focusing on the introduction of the structural design of the 14T MRI magnet systems, including the coils, main frame, cold shield, dewar, pre-tension and supporting structures. In addition, the preliminary mechanical analysis results of the structure systems are performed.