公开(公告)号：US20150008921A1

公开(公告)日：2015-01-08

申请号：US14325739

申请日：2014-07-08

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Dae-ho LEE ,  Sang-young ZHO ,  Joon-soo KIM

IPC: G01R33/387

CPC classification number: G01R33/387 ,  G01R33/56518

Abstract: A magnetic field measuring method in a magnetic resonance imaging (MRI) apparatus includes applying a radio frequency (RF) pulse to an object, acquiring first and second echo signals from a first readout gradient according to test gradients having different intensities, acquiring third and fourth echo signals from a second readout gradient according to the test gradients having different intensities, and determining a characteristic value of an eddy field based on an echo time (TE) of at least one of the first through the fourth echo signals.

Abstract translation: 磁共振成像（MRI）装置中的磁场测量方法包括：对物体施加射频（RF）脉冲，根据具有不同强度的测试梯度从第一读出梯度获取第一和第二回波信号，获取第三和第四 根据具有不同强度的测试梯度，来自第二读出梯度的回波信号，以及基于第一至第四回波信号中的至少一个的回波时间（TE）确定涡流的特征值。

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。