公开(公告)号：US10060999B2

公开(公告)日：2018-08-28

申请号：US14322507

申请日：2014-07-02

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae-ho Lee ,  Man-woo Lee ,  Sang-heum Cho

IPC: G01V3/00 ,  G01R33/44 ,  G01R33/565

CPC classification number: G01R33/443 ,  G01R33/565 ,  G01R33/56572

Abstract: Provided are a method and a magnetic resonance imaging apparatus for measuring an MR signal. The method includes: applying a radio frequency (RF) pulse to an object; acquiring, as a response to the RF pulse, a plurality of echo signals from a plurality of readout gradients formed on a gradient coil; measuring delay times of the plurality of echo signals based on points in time when the respective echo signals are acquired; and determining a gradient delay based on the plurality of delay times.

公开(公告)号：US09689953B2

公开(公告)日：2017-06-27

申请号：US13887717

申请日：2013-05-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Man-woo Lee ,  Joon-soo Kim

IPC: G01R33/58 ,  G01R33/565

CPC classification number: G01R33/56572 ,  G01R33/565 ,  G01R33/56518 ,  G01R33/58

Abstract: A method of diagnosing a magnetic resonance imaging (MRI) system includes forming a gradient magnetic field in a scanning space where a target object is positioned by generating a plurality of modified gradient pulses based on a reference gradient pulse and applying one of the plurality of modified gradient pulses to one of an x-axis coil, a y-axis coil, and a z-axis coil included in a gradient coil, applying a radio frequency (RF) pulse from an RF coil to the target object in the scanning space where the gradient magnetic field corresponding to each of the plurality of modified gradient pulses is formed, receiving a plurality of RF signals that are generated from the target object and correspond to the plurality of modified gradient pulses, and compensating an output of the gradient coil based on the plurality of received RF signals.