公开(公告)号：US20200333410A1

公开(公告)日：2020-10-22

申请号：US16699415

申请日：2019-11-29

申请人： Gudrun Ruyters ,  Andrew Dewdney ,  Manuel Stich ,  Herbert Köstler ,  Christiane Pfaff ,  Tobias Wech ,  Adrienne Campbell-Washburn

发明人： Gudrun Ruyters ,  Andrew Dewdney ,  Manuel Stich ,  Herbert Köstler ,  Christiane Pfaff ,  Tobias Wech ,  Adrienne Campbell-Washburn

IPC分类号： G01R33/385 ,  G01R33/565

摘要： The disclosure relates to methods, devices, and systems for developing gradient system characterization functions and imaging a patient using pre-emphasized magnetic field components in a magnetic resonance (MR) device, wherein the processes allow for a reduction in a number of artifacts when reconstructing the magnetic resonance image. The gradient system characterization function (e.g., a gradient system transfer function) may be developed by measuring a behavior of the MR device at a target temperature and developing at least one gradient system characterization function for a gradient coil of the MR device at the target temperature based on the measured behavior. A patient may be subsequently imaged by the MR device, wherein the imaging process comprises measuring a temperature of a gradient coil, determining a gradient system characterization function at the measured temperature, calculating a pre-emphasized gradient of the gradient coil, and imaging the patient using the pre-emphasized magnetic field component.

公开(公告)号：US20170059670A1

公开(公告)日：2017-03-02

申请号：US15245398

申请日：2016-08-24

申请人： Matthias Gebhardt ,  Gudrun Ruyters

发明人： Matthias Gebhardt ,  Gudrun Ruyters

IPC分类号： G01R33/24 ,  G01R33/54 ,  G01R33/28

CPC分类号： G01R33/24 ,  G01R33/288 ,  G01R33/385 ,  G01R33/543

摘要： A method and system for determining a maximum function for a magnetic resonance imaging scanner. The maximum function indicates the upper bound of a magnetic field magnitude in an examination volume in dependence on activation signals of magnetic coils acting on the examination volume. The examination volume is divided into a plurality of partial volumes. The method determines matrices (MB), which, when multiplied by a vector of the activation signals of the magnetic coils, indicate a resultant square of the magnetic field magnitude for each partial volume.

摘要翻译： 一种用于确定磁共振成像扫描仪的最大功能的方法和系统。 最大功能根据作用于检查体积的磁性线圈的激活信号，指示检查体积中磁场强度的上限。 检查体积分为多个部分体积。 该方法确定矩阵（MB），当乘以磁线圈的激活信号的矢量时，其表示每个部分体积的磁场强度的合成平方。

公开(公告)号：US11112472B2

公开(公告)日：2021-09-07

申请号：US16699415

申请日：2019-11-29

申请人： Gudrun Ruyters ,  Andrew Dewdney ,  Manuel Stich ,  Herbert Köstler ,  Christiane Pfaff ,  Tobias Wech ,  Adrienne Campbell

发明人： Gudrun Ruyters ,  Andrew Dewdney ,  Manuel Stich ,  Herbert Köstler ,  Christiane Pfaff ,  Tobias Wech ,  Adrienne Campbell

IPC分类号： G01R33/385 ,  G01R33/565

摘要： A gradient system characterization function (e.g., a gradient system transfer function) may be developed by measuring a behavior of the MR device at a target temperature and developing at least one gradient system characterization function for a gradient coil of a magnetic resonance (MR) device at the target temperature based on the measured behavior. A patient may be subsequently imaged by the MR device, wherein the imaging process comprises measuring a temperature of a gradient coil, determining a gradient system characterization function at the measured temperature, calculating a pre-emphasized gradient of the gradient coil, and imaging the patient using the pre-emphasized magnetic field component.

公开(公告)号：US10663538B2

公开(公告)日：2020-05-26

申请号：US15700124

申请日：2017-09-09

申请人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Swen Campagna ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Helmut Lenz ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester

发明人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Swen Campagna ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Helmut Lenz ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester

IPC分类号： G01R33/24 ,  G01R33/385 ,  G01R33/28

摘要： A method for monitoring a temporal change in a magnetic field in a magnetic resonance device, as well as an evaluation unit, a magnetic resonance device, and a computer program product for performing the method are provided. The method provides that a position-dependent magnetic field distribution that is produced by the plurality of gradient coils is provided with a plurality of monitoring points. In addition, time-dependent gradient values of the plurality of gradient coils are ascertained. Based on position-dependent magnetic field distribution and the time-dependent gradient values, the temporal change in the magnetic field is ascertained. The temporal change in the magnetic field is monitored by comparing the temporal change in the magnetic field with at least one limit value.

公开(公告)号：US10101415B2

公开(公告)日：2018-10-16

申请号：US15488478

申请日：2017-04-15

申请人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester ,  Swen Campagna

发明人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester ,  Swen Campagna

IPC分类号： G01V3/00 ,  G01R33/28 ,  A61B5/055 ,  G01R33/54

摘要： A method for operating a magnetic resonance apparatus by a safety unit, taking into account persons fitted with an implant, a safety unit, a safety system, a magnetic resonance apparatus, and a computer program product are provided. The magnetic resonance apparatus includes a first part and a second part. The first part is operated separately from the second part and includes the safety unit. During an examination of a person fitted with an implant, the safety unit checks that the magnetic resonance apparatus, in a restricted operating mode, is complying with implant-conformant limit values.

公开(公告)号：US20180074138A1

公开(公告)日：2018-03-15

申请号：US15700124

申请日：2017-09-09

申请人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Swen Campagna ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Helmut Lenz ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester

发明人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Swen Campagna ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Helmut Lenz ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester

IPC分类号： G01R33/24 ,  G01R33/385 ,  G01R33/28

CPC分类号： G01R33/24 ,  G01R33/288 ,  G01R33/385

摘要： A method for monitoring a temporal change in a magnetic field in a magnetic resonance device, as well as an evaluation unit, a magnetic resonance device, and a computer program product for performing the method are provided. The method provides that a position-dependent magnetic field distribution that is produced by the plurality of gradient coils is provided with a plurality of monitoring points. In addition, time-dependent gradient values of the plurality of gradient coils are ascertained. Based on position-dependent magnetic field distribution and the time-dependent gradient values, the temporal change in the magnetic field is ascertained. The temporal change in the magnetic field is monitored by comparing the temporal change in the magnetic field with at least one limit value.

公开(公告)号：US20170299667A1

公开(公告)日：2017-10-19

申请号：US15488478

申请日：2017-04-15

申请人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester ,  Swen Campagna

发明人： Wolfgang Bielmeier ,  Gerhard Brinker ,  Nikolaus Demharter ,  Bernd Erbe ,  Matthias Gebhardt ,  Jürgen Nistler ,  Dominik Paul ,  Carsten Prinz ,  Gudrun Ruyters ,  Stephan Stöcker ,  Markus Vester ,  Swen Campagna

IPC分类号： G01R33/28 ,  G01R33/54 ,  A61B5/055

CPC分类号： G01R33/288 ,  A61B5/055 ,  G01R33/543

摘要： A method for operating a magnetic resonance apparatus by a safety unit, taking into account persons fitted with an implant, a safety unit, a safety system, a magnetic resonance apparatus, and a computer program product are provided. The magnetic resonance apparatus includes a first part and a second part. The first part is operated separately from the second part and includes the safety unit. During an examination of a person fitted with an implant, the safety unit checks that the magnetic resonance apparatus, in a restricted operating mode, is complying with implant-conformant limit values.