公开(公告)号：US20140145719A1

公开(公告)日：2014-05-29

申请号：US13887717

申请日：2013-05-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Man-woo LEE ,  Joon-soo KIM

IPC: 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.

Abstract translation: 诊断磁共振成像（MRI）系统的方法包括：通过基于参考梯度脉冲生成多个修改的梯度脉冲，并在所述多个修改的 向梯度线圈中包括的x轴线圈，y轴线圈和z轴线圈中的一个施加梯度脉冲，在扫描空间中将来自RF线圈的射频（RF）脉冲施加到目标物体， 形成与多个修​​正梯度脉冲中的每一个相对应的梯度磁场，接收从目标对象产生并对应于多个修正梯度脉冲的多个RF信号，并且基于 多个接收的RF信号。

公开(公告)号：US20150008920A1

公开(公告)日：2015-01-08

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: G01R33/44

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.

Abstract translation: 提供了一种用于测量MR信号的方法和磁共振成像装置。 该方法包括：将射频（RF）脉冲施加到对象; 作为对RF脉冲的响应，从形成在梯度线圈上的多个读出梯度获取多个回波信号; 基于获取各个回波信号的时间点来测量多个回波信号的延迟时间; 以及基于所述多个延迟时间确定梯度延迟。