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1. 发明申请

WO2017072805A1 MAGNET ASSEMBLY FOR MRI COMPRISING CYLINDRICAL RINGS OF HALBACH TYPE 审中-公开
标题翻译：包含HALBACH型圆柱环的磁共振成像
公开(公告)号：WO2017072805A1
公开(公告)日：2017-05-04
申请号：PCT/IT2016/000252
申请日：2016-10-25
申请人： SOTGIU, Antonello
发明人： SOTGIU, Antonello
IPC分类号： G01R33/383 , G01R33/3873
CPC分类号： G01R33/383 , G01R33/3873
摘要： The present invention identifies the construction methods and the techniques that allow to obtain a magnetic field of the field homogeneity required for the use in magnetic resonance imaging (MRI), in the order of 20 parts per million (ppm) in the area of interest (such techniques in the following will be indicated with the word "shimming"). The peculiarity of the described constructive method is to obtain a homogeneous field region, usable for the MRI analysis, of linear dimensions equal to about 40% of the linear dimensions of the magnet. The shimming technique involves the use of conditioned magnetic material and allows to control accurately the magnetization of the corrective elements while using a material that inherently has a large spread in the magnetization value. The result is a low weight and small magnet suitable for MRI for dedicated clinical applications such as the analysis of the peripheral joint, the analysis of the ocular region, veterinary applications.
摘要翻译：本发明确定了允许获得用于磁共振成像（MRI）所需的磁场均匀性的磁场的构造方法和技术，其大约为百万分之20（ ppm）在感兴趣的区域中（下文中的这些技术将用词“匀场”来表示）。所描述的构造方法的特点是获得可用于MRI分析的均匀磁场区域，其线性尺寸等于磁体线性尺寸的约40％。匀场技术涉及使用经调节的磁性材料，并且允许在使用固有地具有大的磁化值的材料的同时准确地控制校正元件的磁化。其结果是重量轻，体积小，适用于MRI专用临床应用，如周边关节分析，眼部分析，兽医应用。

2. 发明申请

WO2005120340A3 RADIO FREQUENCY SURFACE COIL DESIGNS FOR MAGNETIC RESONANCE APPARATUS WITH IMPROVED SPATIAL SENSITIVITY AND SELECTIVITY 审中-公开
公开(公告)号：WO2005120340A3
公开(公告)日：2005-12-22
申请号：PCT/IB2005/051855
申请日：2005-06-07
申请人： CONSIGLIO NAZIONALE DELLE RICERCHE - INFM ISTITUTO NAZIONALE PER LA FISICA DELLA MATERIA , ALFONSETTI, Maria , PLACIDI, Giuseppe , SOTGIU, Antonello , CLEMENTI, Valeria , IOTTI, Stefano , LODI, Raffaele , BARBIROLI, Bruno , ALECCI, Marcello
发明人： ALFONSETTI, Maria , PLACIDI, Giuseppe , SOTGIU, Antonello , CLEMENTI, Valeria , IOTTI, Stefano , LODI, Raffaele , BARBIROLI, Bruno , ALECCI, Marcello
IPC分类号： G01R33/341
摘要： Surface coil configurations for a magnetic resonance apparatus are described, said configurations comprising a conductive path (10) which extends substantially in a figure of eight forming a pair of adjacent lobes (10a, 10b;) and including a plurality of middle linear sections (20a, 20a', 20a'', 20b, 20b', 20b'';) passed through by current directed in the same direction or in substantially concordant directions and grouped together in a central region of the coil, and sections with an arbitrary shape (22a, 22b) passed through current in the opposite direction in the peripheral region, so that the magnetic radiofrequency field in the central region of the coil is substantially directed in a direction parallel to the local plane of the coil and is spatially non-homogeneous and able to be modulated depending on the number and the geometrical arrangement of said middle linear sections.

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