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1. 发明公开

EP3082592A1 RF SHIELDING CONDUIT FOR MRI CLOSURE ASSEMBLY 审中-公开
标题翻译： RF屏蔽线MRI的封闭装置，
公开(公告)号：EP3082592A1
公开(公告)日：2016-10-26
申请号：EP14872975.9
申请日：2014-12-17
申请人： Aspect Imaging Ltd.
发明人： RAPOPORT, Uri
IPC分类号： A61B5/05 , A61B6/00 , H05K9/00
CPC分类号： G01R33/42 , A61B5/055 , A61B2562/182 , G01R33/0052 , G01R33/28 , G01R33/422 , G01R33/48 , H05K9/00
摘要： The present invention provides, in a magnetic resonance imaging device (MRD) comprising (a) a main longitudinal axis with a distal and proximal ends; (b) an open bore extended along the axis and terminated by an aperture located in the proximal end; and (c) a closure assembly which is shaped to fit the aperture; an RF shielding conduit (RFSC), having apertures shaped to permit passage of medical equipment tubing from the external environment of the MRD to inner space of the bore, affixed to the closure assembly, wherein the conduit is characterized by a length (l) and width (w), l:w ratio is greater than a predefined value n, thereby providing RF shielding.

2. 发明公开

EP2910370A2 Customized magnetic susceptibility materials 审中-公开
标题翻译：改编磁SUSZEPTIBILITÄTSMATERIALIEN
公开(公告)号：EP2910370A2
公开(公告)日：2015-08-26
申请号：EP15155945.7
申请日：2015-02-20
申请人： Northrop Grumman Systems Corporation
发明人： Bulatowicz, Michael D.
IPC分类号： B32B15/00 , B32B15/01 , B32B18/00 , G01C19/00 , G01C19/60 , G01N24/00 , G01R33/20 , G01R33/28 , G01R33/34 , G01R33/387 , G01R33/42 , G01R33/44 , H05K9/00 , C04B37/00 , C04B37/02
CPC分类号： G01R33/34 , B05D7/52 , B32B15/00 , B32B15/01 , B32B18/00 , C04B37/001 , C04B37/021 , C04B2237/34 , C04B2237/348 , C04B2237/36 , C04B2237/408 , G01C19/00 , G01C19/60 , G01R33/00 , G01R33/42 , G01R33/56536 , Y10T428/23
摘要： One example includes a method for fabricating a compound material. The method includes providing a first discrete material layer having a first thickness dimension. The first discrete material layer includes a first material having a first magnetic susceptibility. The method also includes depositing a second discrete material layer having a second thickness dimension over the first discrete material layer. The second discrete material layer can include a second material having a second magnetic susceptibility. The relative first and second thickness dimensions can be selected to provide a desired magnetic susceptibility of the compound material.

3. 发明公开

EP0430104A2 Magnetic resonance imaging apparatus 失效
标题翻译： Apparat zur Bilderzeugung mittels magnetischer Resonanz。
公开(公告)号：EP0430104A2
公开(公告)日：1991-06-05
申请号：EP90122419.6
申请日：1990-11-23
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Konishi, Mineyuki, c/o Intellectual Property Div.
IPC分类号： G01R33/36 , G01R33/38 , G01R33/42
CPC分类号： G01R33/42 , G01R33/422
摘要： In a magnetic resonance imaging apparatus, a radiofrequency shielding body (20), which is disposed between the gradient magnetic field generating coils (12) and the radio-frequency coil (13) for interrupting electromagnetic coupling between the gradient magnetic field generating coils (12a, 12b, 12c) and the radio-frequency coil (13) due to the radio-frequency pulse applied to the radio-frequency coil (13), is formed of a conductive material having a thickness less than the skin depth defined by where π stands for the ratio of the circumference of a circle to its diameter, fo stands for the Larmor frequency of atomic nuclei of an imaging object, µ stands for the conductivity of the conductive material and σ stands for the magnetic permeability of the conductive material.
摘要翻译：在磁共振成像装置中，设置在倾斜磁场产生线圈（12）和射频线圈（13）之间的用于中断倾斜磁场产生线圈（12a）之间的电磁耦合的射频屏蔽体（20），12b，12c）和由射频线圈（13）施加的射频脉冲引起的射频线圈（13）由导电材料形成，导电材料的厚度小于由 $其中pi表示圆周长与其直径的比率，fo表示成像对象的原子核的Larmor频率，μ表示导电材料的导电率，sigma表示导电性的导磁率材料。$

4. 发明公开

EP4390430A1 METHOD AND SYSTEM FOR DETERMINING A POSITION OF A PORTABLE MRI SYSTEM 审中-公开
公开(公告)号：EP4390430A1
公开(公告)日：2024-06-26
申请号：EP22215566.5
申请日：2022-12-21
申请人： Koninklijke Philips N.V.
发明人： WEISS, Steffen , LEUSSLER, Christoph Günther , VOGTMEIER, Gereon , JOHNSON, Mark Thomas
IPC分类号： G01R33/38 , G01R33/24 , G01R33/42 , G01R33/44 , G01R33/02 , G01R33/10 , G01R33/28 , G01R33/381 , G01R33/028
CPC分类号： G01R33/42 , G01R33/445 , G01R33/3802 , G01R33/28 , G01R33/381 , G01R33/025 , G01R33/5659 , G01R33/56563
摘要： Influence of RF noise and external magnetic field on the image quality of a portable magnetic resonance imaging (MRI) system (1) are to be avoided. This is achieved by providing a system and a computer-implemented method for determining an optimized position and/or orientation of a portable MRI system (1) for an MR imaging process in a medical environment (2), comprising at least one RF noise sensor (3), wherein the RF noise sensor (3) is configured for measuring RF noise in the medical environment (2) and to provide sensor data, at least one magnetic field sensor (4), wherein the magnetic field sensor (4) is configured to measure the external magnetic field in the medical environment (2) and to provide sensor data, a processor unit (5), wherein the sensors (3, 4) are connected to the processor unit (5), the processor unit (5) comprising at least one memory (6) for storing instructions, at least one processor (7) configured to execute the instructions to cause the following to be performed: measuring RF noise and the external magnetic field in the medical environment by means of corresponding sensors (3, 4), evaluating the sensor data and creating spatial distributions of the measured RF noise and/or the measured external magnetic field in the medical environment (2), determining a position and/or orientation of the portable MRI system (1) in the medical environment (2) for an MR imaging process based on the spatial distributions of the measured RF noise and/or the measured external magnetic field.

5. 发明公开

EP2910370A3 Customized magnetic susceptibility materials 审中-公开
标题翻译：定制磁化率材料
公开(公告)号：EP2910370A3
公开(公告)日：2015-12-23
申请号：EP15155945.7
申请日：2015-02-20
申请人： Northrop Grumman Systems Corporation
发明人： Bulatowicz, Michael D.
IPC分类号： B32B15/00 , B32B15/01 , B32B18/00 , G01C19/00 , G01C19/60 , G01N24/00 , G01R33/20 , G01R33/28 , G01R33/34 , G01R33/387 , G01R33/42 , G01R33/44 , H05K9/00 , C04B37/00 , C04B37/02
CPC分类号： G01R33/34 , B05D7/52 , B32B15/00 , B32B15/01 , B32B18/00 , C04B37/001 , C04B37/021 , C04B2237/34 , C04B2237/348 , C04B2237/36 , C04B2237/408 , G01C19/00 , G01C19/60 , G01R33/00 , G01R33/42 , G01R33/56536 , Y10T428/23
摘要： One example includes a method for fabricating a compound material. The method includes providing a first discrete material layer having a first thickness dimension. The first discrete material layer includes a first material having a first magnetic susceptibility. The method also includes depositing a second discrete material layer having a second thickness dimension over the first discrete material layer. The second discrete material layer can include a second material having a second magnetic susceptibility. The relative first and second thickness dimensions can be selected to provide a desired magnetic susceptibility of the compound material.
摘要翻译：一个例子包括制造复合材料的方法。该方法包括提供具有第一厚度尺寸的第一离散材料层。第一离散材料层包括具有第一磁化率的第一材料。该方法还包括在第一离散材料层上沉积具有第二厚度尺寸的第二离散材料层。第二离散材料层可以包括具有第二磁化率的第二材料。可以选择相对的第一和第二厚度尺寸以提供化合物材料的期望磁化率。

6. 发明授权

EP0151726B1 A shield for decoupling RF and gradient coils in an NMR apparatus 有权
标题翻译：用于在NMR装置中解耦RF和等级线圈的屏蔽
公开(公告)号：EP0151726B1
公开(公告)日：1988-08-17
申请号：EP84114885.1
申请日：1984-12-06
申请人： GENERAL ELECTRIC COMPANY
发明人： Hayes, Cecil Edward , Eash, Matthew G.
IPC分类号： H01F27/36 , H01F7/22
CPC分类号： G01R33/422 , G01R33/42 , Y10S505/844

7. 发明公开

EP0105550A1 Nuclear magnetic resonance tomography apparatus including a Faraday cage 失效
标题翻译：磁共振断层成像装置，包括一个法拉第笼。
公开(公告)号：EP0105550A1
公开(公告)日：1984-04-18
申请号：EP83201334.6
申请日：1983-09-16
申请人： Philips Electronics N.V.
发明人： Van Dijk, Pieter
IPC分类号： G01N24/04 , G01N24/08
CPC分类号： G01R33/42 , G01R33/28 , G01R33/422
摘要： @ A nuclear magnetic resonance tomography apparatus incuding a Faraday cage (30) which, in order to shield the measurement space against stray electromagnetic fields and in order to increase the Q factor of a coil circuit which comprises the transmitting/receiving coil (10) of the apparatus, is arranged around the object space (32) inside the magnetic coils (2,4) for generating the necessary steady magnetic field but around the RF transmitting/receiving coil (10). The transmitting/receiving coil may be provided with comb-like screens which shield against electrical fields and the Faraday cage may include a readily accessible extension having larger transverse dimensions.

8. 发明授权

EP0430104B1 Magnetic resonance imaging apparatus 失效
标题翻译：一种用于磁共振成像
公开(公告)号：EP0430104B1
公开(公告)日：1998-04-15
申请号：EP90122419.6
申请日：1990-11-23
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Konishi, Mineyuki, c/o Intellectual Property Div.
IPC分类号： G01R33/36 , G01R33/38 , G01R33/42
CPC分类号： G01R33/42 , G01R33/422

9. 发明公开

EP0710434A1 ACTIVE ELECTROMAGNETIC SHIELDING 失效
标题翻译：署理电磁屏蔽
公开(公告)号：EP0710434A1
公开(公告)日：1996-05-08
申请号：EP94922671.0
申请日：1994-07-22
申请人： Shattil, Steven James
发明人： Shattil, Steven James
IPC分类号： G01R33 , H05K9
CPC分类号： H05K9/00 , G01R33/42 , G10H3/181
摘要： A cancellation circuit provides active electromagnetic shielding for canceling inductive noise in electrical circuits caused by electromagnetic flux. The cancellation circuit includes amplitude-adjustment and phase-adjustment circuits for adjusting amplitude and phase of electrical signals, and a means for combining electrical signals such that the effects of electromagnetic induction cancel. An electromagnetic pickup is provided with a cancellation circuit for canceling its response to electromagnetic flux. An electromagnetic drive coil is provided with a cancellation circuit for canceling electromagnetic flux in a predetermined region of space, and a compensation circuit is disclosed for compensating for frequency-dependent phase and amplitude variations in electrical pickup signals and transmitted electromagnetic flux. The cancellation and compensation circuits may be combined to provide a device that can simultaneously transmit and receive electromagnetic radiation.

10. 发明公开

EP0430104A3 Magnetic resonance imaging apparatus 失效
标题翻译：磁共振成像装置
公开(公告)号：EP0430104A3
公开(公告)日：1991-10-30
申请号：EP90122419.6
申请日：1990-11-23
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Konishi, Mineyuki, c/o Intellectual Property Div.
IPC分类号： G01R33/36 , G01R33/38 , G01R33/42
CPC分类号： G01R33/42 , G01R33/422
摘要： In a magnetic resonance imaging apparatus, a radiofrequency shielding body (20), which is disposed between the gradient magnetic field generating coils (12) and the radio-frequency coil (13) for interrupting electromagnetic coupling between the gradient magnetic field generating coils (12a, 12b, 12c) and the radio-frequency coil (13) due to the radio-frequency pulse applied to the radio-frequency coil (13), is formed of a conductive material having a thickness less than the skin depth defined by where π stands for the ratio of the circumference of a circle to its diameter, fo stands for the Larmor frequency of atomic nuclei of an imaging object, µ stands for the conductivity of the conductive material and σ stands for the magnetic permeability of the conductive material.

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