公开(公告)号：US12044761B2

公开(公告)日：2024-07-23

申请号：US17898251

申请日：2022-08-29

Applicant: GE Precision Healthcare LLC

Inventor： Yu Liu ,  Tingting Song ,  Kai Wang ,  Haoyang Xing ,  Jianye Ning ,  Xin Xie ,  Dongliang Yang ,  Chunlai Xiao

IPC: G01V3/00 ,  G01R33/54

CPC classification number: G01R33/543

Abstract: Provided in an embodiment of the present application are a magnetic resonance imaging system and a transmission apparatus and a transmission method. The method comprises: generating and outputting a pulse signal by a transmission controller; amplifying the pulse signal by a radio-frequency amplifier; transmitting, by a signal processor, the signal amplified by the radio-frequency amplifier to a transmit coil of the magnetic resonance imaging system; and generating frequency offset lookup information for bandwidth compensation of the entire transmission apparatus according to bandwidth data of the transmission controller, the radio-frequency amplifier, and the signal processor; wherein the frequency offset lookup information is used to control the transmission controller to generate output power. Thus, the method can use the frequency offset lookup information to perform digital pre-distortion processing of a power amplifier, and can also improve the bandwidth performance of the entire transmission apparatus and improve the quality of magnetic resonance images.

公开(公告)号：US20230337933A1

公开(公告)日：2023-10-26

申请号：US18194862

申请日：2023-04-03

Applicant: GE Precision Healthcare LLC

Inventor： Jianye Ning ,  Xin Xie ,  Yu Liu ,  Chunlai Xiao ,  Sheng Tong ,  Dongliang Yang ,  Kai Wang

IPC: A61B5/055 ,  A61B5/053

CPC classification number: A61B5/055 ,  A61B5/053

Abstract: An impedance tuner in a magnetic resonance system include at least one of an amplitude tuning circuit and a phase tuning circuit. The amplitude tuning circuit includes M serially-connected amplitude tuners. Each amplitude tuner includes at least one microwave transmission line and a first switch circuit connected in parallel, wherein the first switch circuit controls the at least one microwave transmission line to be in an on state or an off state, respectively, and the value of M is a positive integer greater than or equal to 1. The phase tuning circuit includes a phase tuner, and the phase tuner includes P second microwave transmission lines and a second switch circuit, wherein the second switch circuit controls the P second microwave transmission lines to be in an on state or an off state, respectively, and the value of P is a positive integer greater than or equal to 2.

公开(公告)号：US11500047B2

公开(公告)日：2022-11-15

申请号：US17304346

申请日：2021-06-18

Applicant: GE Precision Healthcare LLC

Inventor： Haoyang Xing ,  Haotian Jiang ,  Xuelian Lu ,  Sheng Tong ,  Yu Liu ,  Hai Huang

IPC: G01R33/36

Abstract: Provided in the present invention are a power control apparatus for a radio-frequency power amplifier and a radio-frequency transmission system for a magnetic resonance imaging system. The power control apparatus comprises: a power control module used to receive a control voltage so as to control an output power of the radio-frequency power amplifier; a voltage detection module used to detect an operating voltage provided to the radio-frequency power amplifier and to output a detected voltage; and a voltage adjustment module used to adjust, on the basis of the detected voltage, the control voltage received by the power control module so as to adjust the output power of the radio-frequency power amplifier.

公开(公告)号：US11249155B2

公开(公告)日：2022-02-15

申请号：US16928139

申请日：2020-07-14

Applicant: GE Precision Healthcare LLC

Inventor： Yu Liu ,  Tingting Song ,  Haoyang Xing ,  Xin Xie ,  Dongliang Yang ,  Chunlai Xiao ,  Xianchao Wu

IPC: G01R33/36

Abstract: The present invention relates to an RF transmit system and method, MRI system and a pre-scan method and medium thereof. The RF transmit system comprises: an RF output unit, for generating and outputting an RF pulse signal; an RF amplifier, for amplifying the RF pulse signal; and a signal processing unit, for communicating the amplified RF pulse signal to an RF transmit coil of the MRI system and outputting a feedback signal to the RF output unit, wherein the RF output unit generates a linearity compensation control signal based on the feedback signal and a predetermined feedback signal-linearity compensation value-relationship, so as to carry out linearity compensation for the RF pulse signal outputted by the RF output unit. The RF transmit method corresponds to the above noted system and the MRI system comprises the above noted RF transmit system. The pre-scan method comprises the RF transmit method. Instructions recorded by the medium may execute the above noted RF transmit method and pre-scan method.

公开(公告)号：US11181592B2

公开(公告)日：2021-11-23

申请号：US16944249

申请日：2020-07-31

Applicant: GE Precision Healthcare LLC

Inventor： Yu Liu ,  Kai Wang ,  Haoyang Xing ,  Xianchao Wu ,  Xin Xie ,  Dongliang Yang

IPC: G01R33/36 ,  H03F3/21

Abstract: A radio-frequency power converter and a radio-frequency transmission system for magnetic resonance imaging are provided in embodiments of the present invention. The radio-frequency power converter comprises a printed circuit board, the printed circuit board comprises a first circuit layer, a ground layer, and one or a plurality of intermediate layers located between the first circuit layer and the ground layer. A plurality of planar spiral inductors connected in parallel are formed on the first circuit layer. One ends of the plurality of inductors are connected to each other and respectively connected to one end of a first capacitor, the other ends of the plurality of inductors are respectively connected to one ends of a plurality of second capacitors, and the other ends of the plurality of second capacitors are all grounded.

公开(公告)号：US10782372B2

公开(公告)日：2020-09-22

申请号：US15720724

申请日：2017-09-29

Applicant: GE Precision Healthcare LLC

Inventor： Qingyu Dai ,  Haoyang Xing ,  Yu Liu ,  Chun Lai Xiao ,  Sheng Tong ,  Weinan Tang

IPC: G01R33/422 ,  G01R33/36 ,  G01R33/3415 ,  A61B5/055 ,  G01R33/385 ,  G01R33/56 ,  G01R33/34

Abstract: A magnetic resonance imaging (MRI) system radio frequency (RF) subsystem and a coil decoupling apparatus and method used therein. The MRI system RF subsystem comprises a body coil and a surface coil for receiving MR signals, and also comprises a preamplifier for amplifying the MR signals received by the body coil; the coil decoupling apparatus comprises a phase shifter, which is connected between the preamplifier and the body coil, and used for receiving an external voltage regulation signal to regulate an operation voltage thereof, wherein the voltage regulation signal is determined according to a current patient's weight.