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公开(公告)号：US09746533B2
公开(公告)日：2017-08-29
申请号：US14375354
申请日：2013-01-14
CPC分类号： G01R33/3642 , G01R33/34 , G01R33/3815 , H01F6/008 , H01F6/06 , H01F6/065 , H01H36/008
摘要： The invention provides for magnetic resonance imaging system (600) comprising a superconducting magnet (100) with a first current lead (108) and a second current lead (110) for connecting to a current ramping system (624). The magnet further comprises a vacuum vessel (104) penetrated by the first current lead and the second current lead. The magnet further comprises a magnet circuit (106) within the vacuum vessel. The magnet circuit has a first magnet circuit connection (132) and a second magnet circuit connection (134). The magnet further comprises a first switch (120) between the first magnet connection and the first current lead and a second switch (122) between the second magnet connection and the second current lead. The magnet further comprises a first current shunt (128) connected across the first switch and a second current shunt (130) connected across the second switch. The magnet further comprises a first rigid coil loop (124) operable to actuate the first switch. The first rigid coil loop forms a portion of the first electrical connection. The magnet further comprises a second rigid coil loop (126) operable to actuate the second switch. The second rigid coil loop forms a portion of the second electrical connection.
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2.发明申请RF-SAFE INTERVENTIONAL OR NON-INTERVENTIONAL INSTRUMENT FOR USE IN AN MRI APPARATUS 有权RF安全性传统或非传统仪器用于MRI设备公开(公告)号：US20140303485A1
公开(公告)日：2014-10-09
申请号：US14359151
申请日：2012-11-22
发明人： Steffen Weiss , Oliver Lips , Bernd David
IPC分类号： G01R33/28
CPC分类号： G01R33/288
摘要： An RF-safe interventional or a non-interventional instrument is disclosed for use during an MR imaging or MR examination of an examination object (A), which instrument is made of or comprises at least one longitudinal or elongated electrically conductive element (1, 3), especially in the form of a conductor or wire or line for feeding electrical signals, or in the form of the instrument itself or a component or a part thereof, which is not provided for feeding electrical signals but nevertheless electrically conductive, wherein all such elements are subject to RF common mode currents which are induced in the element when the instrument or element is exposed to an RF/MR excitation field generated during MR imaging or MR examination by means of an MR imaging apparatus. The instrument is made RF-safe by increasing the energy A loss of an oscillator which is represented by the conductor (1, 3) by means of a damping element (4; 6) in order to prevent or limit RF heating of the examination object (A) at or surrounding the conductor (1, 3).
摘要翻译： 公开了用于在检查对象（A）的MR成像或MR检查期间使用的RF安全介入或非介入性仪器，该仪器由或包括至少一个纵向或细长的导电元件（1,3） ），特别是用于馈送电信号的导线或线或线的形式，或以仪器本身或其部件或部分的形式，其不被提供用于馈送电信号但仍然导电，其中所有这些 当仪器或元件暴露于通过MR成像设备的MR成像或MR检查期间产生的RF / MR激励场时，元件受到在元件中感应的RF共模电流。 通过增加由导体（1,3）表示的振荡器的能量A的损失，通过阻尼元件（4; 6）来增加仪器的RF安全性，以便防止或限制检查对象的RF加热 （A）在导体（1,3）处或周围。
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公开(公告)号：US20170356970A1
公开(公告)日：2017-12-14
申请号：US15688047
申请日：2017-08-28
CPC分类号： G01R33/3642 , G01R33/34 , G01R33/3815 , H01F6/008 , H01F6/06 , H01F6/065 , H01H36/008
摘要： The invention provides for magnetic resonance imaging system (600) comprising a superconducting magnet (100) with a first current lead (108) and a second current lead (110) for connecting to a current ramping system (624). The magnet further comprises a vacuum vessel (104) penetrated by the first current lead and the second current lead. The magnet further comprises a magnet circuit (106) within the vacuum vessel. The magnet circuit has a first magnet circuit connection (132) and a second magnet circuit connection (134). The magnet further comprises a first switch (120) between the first magnet connection and the first current lead and a second switch (122) between the second magnet connection and the second current lead. The magnet further comprises a first current shunt (128) connected across the first switch and a second current shunt (130) connected across the second switch. The magnet further comprises a first rigid coil loop (124) operable to actuate the first switch. The first rigid coil loop forms a portion of the first electrical connection. The magnet further comprises a second rigid coil loop (126) operable to actuate the second switch. The second rigid coil loop forms a portion of the second electrical connection.
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公开(公告)号：US09891298B2
公开(公告)日：2018-02-13
申请号：US15688047
申请日：2017-08-28
CPC分类号： G01R33/3642 , G01R33/34 , G01R33/3815 , H01F6/008 , H01F6/06 , H01F6/065 , H01H36/008
摘要： The invention provides for magnetic resonance imaging system (600) comprising a superconducting magnet (100) with a first current lead (108) and a second current lead (110) for connecting to a current ramping system (624). The magnet further comprises a vacuum vessel (104) penetrated by the first current lead and the second current lead. The magnet further comprises a magnet circuit (106) within the vacuum vessel. The magnet circuit has a first magnet circuit connection (132) and a second magnet circuit connection (134). The magnet further comprises a first switch (120) between the first magnet connection and the first current lead and a second switch (122) between the second magnet connection and the second current lead. The magnet further comprises a first current shunt (128) connected across the first switch and a second current shunt (130) connected across the second switch. The magnet further comprises a first rigid coil loop (124) operable to actuate the first switch. The first rigid coil loop forms a portion of the first electrical connection. The magnet further comprises a second rigid coil loop (126) operable to actuate the second switch. The second rigid coil loop forms a portion of the second electrical connection.
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公开(公告)号：US09835697B2
公开(公告)日：2017-12-05
申请号：US14359151
申请日：2012-11-22
发明人： Steffen Weiss , Oliver Lips , Bernd David
IPC分类号： G01R33/28
CPC分类号： G01R33/288
摘要： An RF-safe interventional or a non-interventional instrument is used during an MR imaging or MR examination of an examination object (A). The instrument is made of or includes at least one longitudinal or elongated electrically conductive element (1, 3), for example, in the form of a conductor or wire or line for feeding electrical signals, or in the form of the instrument itself or a component or a part thereof, which is not provided for feeding electrical signals but is nevertheless electrically conductive. All such elements are subject to RF common mode currents which are induced in the element when the instrument or element is exposed to an RF/MR excitation field generated during MR imaging or MR examination by an MR imaging apparatus. The instrument is made RF-safe by increasing the energy loss of an oscillator which is represented by the conductor (1, 3) by a damping element (4; 6) in order to prevent or limit RF heating of the examination object (A) at or surrounding the conductor (1, 3).
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公开(公告)号：US20150045226A1
公开(公告)日：2015-02-12
申请号：US14375354
申请日：2013-01-14
IPC分类号： G01R33/36 , G01R33/34 , H01F6/06 , G01R33/3815
CPC分类号： G01R33/3642 , G01R33/34 , G01R33/3815 , H01F6/008 , H01F6/06 , H01F6/065 , H01H36/008
摘要： The invention provides for magnetic resonance imaging system (600) comprising a superconducting magnet (100) with a first current lead (108) and a second current lead (110) for connecting to a current ramping system (624). The magnet further comprises a vacuum vessel (104) penetrated by the first current lead and the second current lead. The magnet further comprises a magnet circuit (106) within the vacuum vessel. The magnet circuit has a first magnet circuit connection (132) and a second magnet circuit connection (134). The magnet further comprises a first switch (120) between the first magnet connection and the first current lead and a second switch (122) between the second magnet connection and the second current lead. The magnet further comprises a first current shunt (128) connected across the first switch and a second current shunt (130) connected across the second switch. The magnet further comprises a first rigid coil loop (124) operable to actuate the first switch. The first rigid coil loop forms a portion of the first electrical connection. The magnet further comprises a second rigid coil loop (126) operable to actuate the second switch. The second rigid coil loop forms a portion of the second electrical connection.
摘要翻译： 本发明提供了包括具有第一电流引线（108）的超导磁体（100）和用于连接到电流斜坡系统（624）的第二电流引线（110）的磁共振成像系统（600）。 磁体还包括由第一电流引线和第二电流引线穿透的真空容器（104）。 磁体还包括在真空容器内的磁体回路（106）。 磁体电路具有第一磁体电路连接（132）和第二磁体电路连接（134）。 磁体还包括在第一磁体连接和第一电流引线之间的第一开关（120）和在第二磁体连接和第二电流引线之间的第二开关（122）。 磁体还包括跨越第一开关连接的第一电流分流器（128）和连接在第二开关上的第二电流分流器（130）。 磁体还包括可操作以致动第一开关的第一刚性线圈环（124）。 第一刚性线圈环形成第一电连接的一部分。 磁体还包括可操作以致动第二开关的第二刚性线圈环（126）。 第二刚性线圈环形成第二电连接的一部分。
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