公开(公告)号：WO2016106037A1

公开(公告)日：2016-06-30

申请号：PCT/US2015/066019

申请日：2015-12-16

Applicant: GENERAL ELECTRIC COMPANY

Inventor： LVOVSKY, Yuri ,  JIANG, Longzhi ,  DERAKHSHAN, Mark ,  LEGALL, Edwin

IPC: H01F6/00 ,  A61B5/055

CPC classification number: G01R33/3815 ,  G01R33/288 ,  G01R33/3875 ,  G01R33/543

Abstract: A control system for a superconducting magnet includes an electrically conductive lead having a first end electrically coupled to the superconducting magnet, at least one of a main power supply, a shimming power supply and a discharge module electrically coupled to a second end of the lead, and a controller in communication with the at least one of the main power supply, the shimming power supply and the discharge module. The controller is configured to monitor at least one magnet parameter value indicative of a state of the superconducting magnet and to automatically control operation of the at least one of the main power supply, the shimming power supply and the discharge module when the magnet parameter value crosses a predetermined threshold value prior to a quench.

Abstract translation: 用于超导磁体的控制系统包括导电引线，其具有电耦合到超导磁体的第一端，主电源，匀场电源和与引线的第二端电耦合的放电模块中的至少一个， 以及与主电源，匀场电源和放电模块中的至少一个通信的控制器。 所述控制器被配置为当所述磁体参数值越过所述控制器时，监视指示所述超导磁体的状态的至少一个磁体参数值，并且自动控制所述主电源，所述匀场电源和所述排出模块中的至少一个的操作 在骤冷之前的预定阈值。

公开(公告)号：WO2017119994A1

公开(公告)日：2017-07-13

申请号：PCT/US2016/066361

申请日：2016-12-13

Applicant: GENERAL ELECTRIC COMPANY

Inventor： SEEBER, Derek ,  LEGALL, Edwin

IPC: A61B5/055 ,  G01R33/565 ,  G01R33/48

CPC classification number: G01R33/4818 ,  G01R33/243 ,  G01R33/56518 ,  G01R33/58

Abstract: Various methods and systems are provided for correcting k-space trajectories. In one embodiment, a system comprises a coil configured to generate a magnetic field, a plurality of magnetic field probes positioned at the coil and configured to measure the magnetic field, and a controller communicatively coupled to the plurality of magnetic field probes and including instructions stored in non-transitory memory that when executed cause the controller to: receive measurements of the magnetic field from the plurality of magnetic field probes; calculate corrections to positions of acquired magnetic resonance signals in spatial-frequency space based on the received measurements; apply the corrections to the positions to generate corrected magnetic resonance signals; and reconstruct an image from the corrected magnetic resonance signals. In this way, image artifacts caused by eddy currents can be reduced.

Abstract translation: 提供了用于修正k空间轨迹的各种方法和系统。 在一个实施例中，系统包括被配置为产生磁场的线圈，被定位在线圈处并被配置为测量磁场的多个磁场探测器，以及被通信地耦合到多个磁场探测器并包括存储的指令的控制器 在非暂时性存储器中，所述非暂时性存储器在被执行时使所述控制器：接收来自所述多个磁场探针的所述磁场的测量结果; 基于接收到的测量值计算对所采集的磁共振信号在空间频率空间中的位置的校正; 将校正应用于位置以生成校正的磁共振信号; 并从修正的磁共振信号重建图像。 通过这种方式，可以减少由涡流引起的图像伪影。