公开(公告)号：US20190132813A1

公开(公告)日：2019-05-02

申请号：US16172394

申请日：2018-10-26

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Xin Jiang ,  Tingting Song ,  Desmond Teck Beng Yeo ,  Thomas Kwok-Fah Foo ,  Jing Li

IPC: H04W56/00 ,  G01R33/422 ,  G01R33/32 ,  H04B17/364 ,  H04B17/391

Abstract: A synchronization system based on wireless or limited cable interconnection is disclosed, which includes a central unit comprising a delay compensation module, and RF transmission channels. At least one channel comprises a clock controller and a synchronization controller. The central unit transmits a controlled clock signal and a controlled synchronization signal to the at least one channel, and receives a clock echo signal and a synchronization echo signal. The delay compensation module estimates a clock phase compensation based on the controlled clock signal transmitted and the clock echo signal received, and a synchronization delay compensation based on the controlled synchronization signal transmitted and the synchronization echo signal received. The clock controller and the synchronization controller adjusts respectively a clock signal and a synchronization signal received from the at least one channel based on the clock phase compensation and the synchronization delay compensation. MR systems and a synchronization method are also disclosed.

公开(公告)号：US10209327B2

公开(公告)日：2019-02-19

申请号：US15329186

申请日：2015-07-24

Applicant: General Electric Company

Inventor： Tingting Song ,  Xin Jiang ,  Jifeng Chen

IPC: G01R33/36 ,  H03F3/189 ,  H03F1/32

Abstract: A radio frequency (RF) amplification method, comprising: modulating a first digital carrier signal with a digital envelop signal to generate digital RF pulse signals having a first frequency, converting the digital RF pulse signals into analog RF pulse signals, amplifying the analog RF pulse signals to generate an RF output signal, converting an analog feedback signal sampled from the RF output signal into digital feedback signals; demodulating the digital feedback signals with a second digital carrier signal to generate an in-phase (I) signal and a quadrature (Q) signal, and generating an amplitude setting signal for adjusting an amplitude of the digital envelop signal and a phase setting signal for adjusting a phase of the first digital carrier signal according to the I signal and the Q signal. The second digital carrier signal has a predetermined frequency shift relative to the first digital carrier signal, and the second digital carrier signal has a predetermined phase shift relative to the first digital carrier signal. The present invention also provides an RF amplification system and a magnetic resonance imaging (MRI) apparatus.

公开(公告)号：US20180275227A1

公开(公告)日：2018-09-27

申请号：US15924579

申请日：2018-03-19

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Tingting Song ,  Desmond Teck Beng Yeo ,  Thomas Kwok-Fah Foo ,  Xin Jiang

IPC: G01R33/36 ,  G01R33/422

CPC classification number: G01R33/3614 ,  G01R33/3415 ,  G01R33/422 ,  G01R33/5659

Abstract: An RF coil array for use in MRI is disclosed, which includes a plurality of transmit coil elements and a plurality of RF power amplifiers. Each RF power amplifier is integrated with at least one transmit coil element for driving the at least one transmit coil element. An MRI transmit array is also disclosed, which includes a plurality of RF transmitters for generating a plurality of RF signals, the RF coil array above-mentioned, and a DC voltage source for providing a DC voltage to the plurality of transmit coil elements. The RF coil array further includes an RF shield for shielding the plurality of transmit coil elements from interacting with magnet cryostat and gradient coil elements. The plurality of RF power amplifiers are connected with respective RF transmitters and configured for power amplification of the RF signals from the respective RF transmitters, and the plurality of transmit coil elements are configured for transmitting respective amplified RF signals.

公开(公告)号：US20180342349A1

公开(公告)日：2018-11-29

申请号：US15987666

申请日：2018-05-23

Applicant: General Electric Company

Inventor： Saijun Mao ,  Bo Qu ,  Jingkui Shi ,  He Xu ,  Jie Shen ,  Tingting Song ,  Zhihui Yuan ,  Xin Jiang ,  Xi Lu ,  Stefan Schroeder ,  Marius Michael Mechlinski

IPC: H01F38/14 ,  H05K1/18 ,  H01F27/28 ,  H01F27/24 ,  H03K17/687

Abstract: An integrated system for signal and power transmission with galvanic isolation is disclosed. The integrated system comprises an insulative layer having a primary side and a secondary side; a planar signal transformer and a planar power transformer for signal and power transmission between the primary and the secondary sides of the insulative layer respectively. The planar signal transformer comprises two signal coupling elements which are disposed on the primary and the secondary sides of the insulative layer respectively. The planar power transformer includes two power coupling elements which are disposed on the primary and the secondary sides of the insulative layer respectively. Each of the two signal coupling elements and the two power coupling elements is embedded in at least one layer of a multi-layer printed circuit board. The integrated system of the present disclosure has a compact structure and is suitable for automatic assembly and manufacturing.

公开(公告)号：US20170212193A1

公开(公告)日：2017-07-27

申请号：US15329186

申请日：2015-07-24

Applicant: General Electric Company

Inventor： Tingting Song ,  Xin Jiang ,  Jifeng Chen

IPC: G01R33/36 ,  H03F3/189

CPC classification number: G01R33/3614 ,  G01R33/36 ,  H03F1/3247 ,  H03F3/189 ,  H03F2200/165 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2200/471

Abstract: A radio frequency (RF) amplification method, comprising: modulating a first digital carrier signal with a digital envelop signal to generate digital RF pulse signals having a first frequency, converting the digital RF pulse signals into analog RF pulse signals, amplifying the analog RF pulse signals to generate an RF output signal, converting an analog feedback signal sampled from the RF output signal into digital feedback signals; demodulating the digital feedback signals with a second digital carrier signal to generate an in-phase (I) signal and a quadrature (Q) signal, and generating an amplitude setting signal for adjusting an amplitude of the digital envelop signal and a phase setting signal for adjusting a phase of the first digital carrier signal according to the I signal and the Q signal. The second digital carrier signal has a predetermined frequency shift relative to the first digital carrier signal, and the second digital carrier signal has a predetermined phase shift relative to the first digital carrier signal. The present invention also provides an RF amplification system and a magnetic resonance imaging (MRI) apparatus.