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公开(公告)号：US10141909B2
公开(公告)日：2018-11-27
申请号：US15723920
申请日：2017-10-03
Applicant: General Electric Company
Inventor： Melissa Jean Freeman , Thomas George McFarland , Margaret Ann Wiza , Douglas Link
Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.
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公开(公告)号：US10132852B2
公开(公告)日：2018-11-20
申请号：US14585813
申请日：2014-12-30
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Margaret Ann Wiza , Louis Martin Frigo , Melissa Jean Freeman , Douglas Link , Michael Thomas Rose , Andrew John Panos
IPC: G01R31/06 , G01R33/385 , G01R31/44
Abstract: An apparatus that includes a power amplifier; a load that is operatively connected to be electrically driven from the power amplifier; and an impedance monitor that is configured to in real-time identify a favorable segment within an output waveform of the power amplifier, model the baseline power spectral density of a load driven by the power amplifier during the identified segment of the output waveform, sample an empirical power spectral density of the load during the identified segment of the output waveform, and indicate a load fault in the event that the empirical power spectral density deviates from the baseline power spectral density beyond at least one pre-determined error criteria.
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公开(公告)号：US10101417B2
公开(公告)日：2018-10-16
申请号：US14817138
申请日：2015-08-03
Applicant: General Electric Company
Inventor： Andreas Ebel , Melissa Jean Freeman , Clyve Konrad Rosales Follante , Hyokwon Nam
Abstract: Various methods and systems are provided for detecting an unplugged radio frequency (RF) coil in a magnetic resonance imaging (MRI) system. In one embodiment, a device for an RF coil comprises an alert generator, a power source, and a field-sensitive switch including an open state and a closed state, wherein the field-sensitive switch switches from the open state to the closed state responsive to sensing a magnetic field with a strength above a threshold, and wherein the field-sensitive switch in the closed state electrically couples the alert generator and the power source. In this way, an alert may be generated to notify an operator of an MRI apparatus of an unplugged RF coil.
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Patent Agency Ranking
公开(公告)号：US20180026602A1
公开(公告)日：2018-01-25
申请号：US15723920
申请日：2017-10-03
Applicant: General Electric Company
Inventor： Melissa Jean Freeman , Thomas George McFarland , Margaret Ann Wiza , Douglas Link
IPC: H03H7/09
CPC classification number: H03H7/09 , H03H7/06 , H03H7/075 , H03H2007/013
Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.
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公开(公告)号：US10310038B2
公开(公告)日：2019-06-04
申请号：US15163193
申请日：2016-05-24
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Margaret Ann Wiza , Melissa Jean Freeman , Syed Saad Asif Ali , Douglas John Link , Michael Thomas Rose , Tanzania Samone Sewell
IPC: G01R33/385
Abstract: A method for supplying electrical power to a gradient amplifier that drives a gradient coil for a magnetic resonance imaging system is provided. The method includes predicting a gradient voltage required to drive the gradient coil for a scan based at least in part on a gradient coil model. The method further includes calculating a voltage set point for a power supply based at least in part on the predicted gradient voltage. The method further includes providing electrical power to the gradient amplifier via the power supply based at least in part on the calculated voltage set point. The gradient coil model is based at least in part on historical data acquired prior to the scan.
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公开(公告)号：US20170038443A1
公开(公告)日：2017-02-09
申请号：US14817138
申请日：2015-08-03
Applicant: General Electric Company
Inventor： Andreas Ebel , Melissa Jean Freeman , Clyve Konrad Rosales Follante , Hyokwon Nam
CPC classification number: G01R33/36 , G01R33/3664
Abstract: Various methods and systems are provided for detecting an unplugged radio frequency (RF) coil in a magnetic resonance imaging (MRI) system. In one embodiment, a device for an RF coil comprises an alert generator, a power source, and a field-sensitive switch including an open state and a closed state, wherein the field-sensitive switch switches from the open state to the closed state responsive to sensing a magnetic field with a strength above a threshold, and wherein the field-sensitive switch in the closed state electrically couples the alert generator and the power source. In this way, an alert may be generated to notify an operator of an MRI apparatus of an unplugged RF coil.
Abstract translation: 提供用于检测磁共振成像（MRI）系统中的未插拔射频（RF）线圈的各种方法和系统。 在一个实施例中，用于RF线圈的装置包括报警发生器，电源和包括打开状态和关闭状态的场敏感开关，其中所述场敏感开关从打开状态切换到关闭状态 以感测具有高于阈值的强度的磁场，并且其中所述关闭状态下的所述场敏感开关将警报发生器和电源电耦合。 以这种方式，可以产生警报以向MRI设备的操作者通知未插拔的RF线圈。
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公开(公告)号：US10247795B2
公开(公告)日：2019-04-02
申请号：US14585554
申请日：2014-12-30
Applicant: General Electric Company
Inventor： Louis Martin Frigo , Melissa Jean Freeman , Margaret Ann Wiza , Douglas Link , Michael Thomas Rose , Scott Richard Weber , Andrew John Panos
IPC: G01R33/385 , G01R33/38
Abstract: A method that includes deriving a first power spectral density function of a signal input to a ripple cancellation filter; deriving a second power spectral density function of a signal concurrently output from the ripple cancellation filter; frequency shaping the first power spectral density according to a spectral rejection image of the ripple cancellation filter to obtain a test power spectral density; and indicating a degraded performance of the ripple cancellation filter in the event that the test and second power spectral density functions fail to match within pre-determined criteria.
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公开(公告)号：US09893705B2
公开(公告)日：2018-02-13
申请号：US14587443
申请日：2014-12-31
Applicant: General Electric Company
Inventor： Melissa Jean Freeman , Thomas George McFarland , Margaret Ann Wiza , Douglas Link
CPC classification number: H03H7/09 , H03H7/06 , H03H7/075 , H03H2007/013
Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.
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