公开(公告)号：US20190094324A1

公开(公告)日：2019-03-28

申请号：US16105096

申请日：2018-08-20

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun-seok SEO ,  Hyun-wook PARK ,  Joon-soo KIM ,  Seo-hee SO ,  Dae-ho LEE

IPC: G01R33/56 ,  G01R33/561

Abstract: The MRI apparatus includes a processor configured to apply a gradient echo pulse sequence that makes a sum of gradients applied during one repetition time (TR) in a slice selection direction, a phase encoding direction, and a frequency encoding direction equal zero and maintains spins in an object in a steady state; alternately apply, while the gradient echo pulse sequence is continuously applied, a first radio frequency (RF) pulse having a first flip angle and a second RF pulse having a second flip angle that is different from the first flip angle at each TR interval; and generate an MR image based on an echo signal acquired when the spins are in the steady state

公开(公告)号：US20170131377A1

公开(公告)日：2017-05-11

申请号：US15347906

申请日：2016-11-10

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Young-beom KIM ,  Hyun-wook PARK ,  Dong-chan KIM ,  Hyun-seok SEO ,  Ki-nam KWON ,  Jae-jin CHO

IPC: G01R33/563 ,  G01R33/28 ,  A61B5/00 ,  A61B5/055 ,  A61B5/0402 ,  G01R33/567 ,  G01R33/561

CPC classification number: G01R33/56316 ,  A61B5/0044 ,  A61B5/0263 ,  A61B5/0402 ,  A61B5/0456 ,  A61B5/055 ,  G01R33/56 ,  G01R33/5607 ,  G01R33/5611 ,  G01R33/5635 ,  G01R33/5673

Abstract: An MRI apparatus includes a controller configured to acquire, based on a gradient echo sequence, an MR signal from an object; and an image processor configured to acquire a first image corresponding to a time point when the MR signal has a largest phase variation, acquire a second image corresponding to a time point when the MR signal has a smallest phase variation, and obtain an arterial image including an artery of the object by using the first image and the second image.

公开(公告)号：US20160282437A1

公开(公告)日：2016-09-29

申请号：US15079671

申请日：2016-03-24

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun-wook PARK ,  Hyun-seok SEO

IPC: G01R33/561 ,  G01R33/483

CPC classification number: G01R33/5614 ,  G01R33/4835

Abstract: Provided is a magnetic resonance imaging (MRI) apparatus for generating an MR image based on a steady state free procession (SSFP) sequence. The MRI apparatus includes: a radio frequency (RF) controller configured to apply to an object a first RF pulse corresponding to a first slice and a second RF pulse corresponding to a second slice; a gradient magnetic field controller configured to control respective gradient magnetic fields in a first direction corresponding to the first and second RF pulses, from among spatial encoding gradients, to have opposite polarities with respect to each other; a data acquisition unit configured to acquire first and second MR signals corresponding to the first and second slices; and an image processor configured to generate first and second MR images corresponding to the first and second slices, respectively, based on the acquired first and second MR signals.

Abstract translation: 提供了一种用于基于稳态自由流动（SSFP）序列产生MR图像的磁共振成像（MRI）装置。 MRI装置包括：射频（RF）控制器，被配置为向对象施加对应于第一切片的第一RF脉冲和对应于第二切片的第二RF脉冲; 梯度磁场控制器，被配置为从空间编码梯度中控制对应于第一和第二RF脉冲的第一方向的相应梯度磁场，以相对于彼此具有相反的极性; 数据获取单元，被配置为获取与所述第一和第二切片相对应的第一和第二MR信号; 以及图像处理器，被配置为基于所获取的第一和第二MR信号分别产生与所述第一和第二切片相对应的第一和第二MR图像。

公开(公告)号：US20210173030A1

公开(公告)日：2021-06-10

申请号：US16770287

申请日：2018-08-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Joon-sung CHOI ,  Hyun-sang SUH ,  Hyun-seok SEO ,  Myung-sung SONG ,  Dae-ho LEE

IPC: G01R33/48 ,  G06T11/00 ,  G01R33/561 ,  A61B5/055 ,  A61B5/00

Abstract: Provided are a method of obtaining a water-fat separation image and a magnetic resonance imaging (MRI) apparatus including a controller configured to obtain first partial k-space data, second partial k-space data, and third partial k-space data, respectively based on a first partial echo signal, a second partial echo signal, and a third partial echo signal, which are magnetic resonance signals corresponding to a plurality of echo times with respect to an object, obtain first reconstruction image data, second reconstruction image data, and third reconstruction image data with respect to the object, respectively based on the first partial k-space data, the second partial k-space data, and the third partial k-space data, and obtain first water image data, first fat image data, and first phase image data of the object, respectively based on the first reconstruction image data, the second reconstruction image data, and the third reconstruction image data, by using a Dixon technique.

公开(公告)号：US20160170002A1

公开(公告)日：2016-06-16

申请号：US14965959

申请日：2015-12-11

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun-wook PARK ,  Dong-chan KIM ,  Chang-heun OH ,  Hyun-seok SEO

IPC: G01R33/565 ,  G01R33/561 ,  G01R33/385

CPC classification number: G01R33/4835 ,  G01R33/5608 ,  G01R33/5611

Abstract: A magnetic resonance imaging apparatus includes a gradient magnetic field controller which applies a spatial encoding gradient to a plurality of slices and applies a gradient magnetic field in a first direction with respect to the plurality of slices, a radio frequency (RF) receiver which receives respective magnetic resonance signals from each of the plurality of slices undersampled in a second direction different from the first direction, and an image processor which generates a respective magnetic resonance image of each of the plurality of slices based on the magnetic resonance signals received from the plurality of slices.

Abstract translation: 磁共振成像装置包括：梯度磁场控制器，对多个切片施加空间编码梯度，并在相对于多个切片的第一方向施加梯度磁场;射频（RF）接收器，其接收相应的 在不同于第一方向的第二方向上欠采样的多个片段中的每一个的磁共振信号，以及基于从多个片段接收到的磁共振信号产生多个片段中的每一个的相应磁共振图像的图像处理器 切片。

公开(公告)号：US20190059780A1

公开(公告)日：2019-02-28

申请号：US15997074

申请日：2018-06-04

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Dae-ho LEE ,  Hyun-wook PARK ,  Ki-nam KWON ,  Hyun-seok SEO

IPC: A61B5/055 ,  G01R33/56 ,  A61B5/00 ,  G06T7/00

CPC classification number: A61B5/055 ,  A61B5/7207 ,  A61B5/7264 ,  G01R33/482 ,  G01R33/546 ,  G01R33/5608 ,  G01R33/5611 ,  G01R33/5615 ,  G06N3/08 ,  G06T7/0014 ,  G06T2207/10088 ,  G06T2207/20081 ,  G06T2207/20084

Abstract: A magnetic resonance imaging (MRI) apparatus includes a processor, and a memory storing a program including instructions that, when executed by the processor, cause the processor to acquire first data of a subsampled magnetic resonance (MR) image, acquire, based on a learning model using a neural network, first reconstructed data with respect to rows of pixels in a first phase encoding direction of the first data of the subsampled MR image, and obtain a reconstructed image corresponding to the subsampled MR image, using the first reconstructed data.

公开(公告)号：US20190033407A1

公开(公告)日：2019-01-31

申请号：US16033387

申请日：2018-07-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hyun-seok SEO ,  Dae-ho LEE ,  Joon-soo KIM

IPC: G01R33/483 ,  G01R33/565

Abstract: A magnetic resonance imaging (MRI) apparatus includes a processor; and a memory connected to the processor and storing an instruction that, when executed by the processor, causes the processor to acquire a first magnetic resonance signal by applying a first pulse sequence to a plurality of slices of an object, acquire a second magnetic resonance signal by applying a second pulse sequence to the plurality of slices, and generate a multi-slice image, based on an average value of the acquired first magnetic resonance signal and the acquired second magnetic resonance signal.

公开(公告)号：US20160349345A1

公开(公告)日：2016-12-01

申请号：US15166653

申请日：2016-05-27

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyun-wook PARK ,  Hyun-seok SEO

IPC: G01R33/563 ,  A61B5/00 ,  G01R33/567 ,  A61B5/055

CPC classification number: G01R33/56308 ,  A61B5/055 ,  A61B5/11 ,  A61B5/113 ,  A61B5/7225 ,  A61B5/7425 ,  G01R33/4835 ,  G01R33/56509

Abstract: A magnetic resonance imaging MRI) apparatus, including a signal transceiver; a controller configured to control the signal transceiver to apply a bipolar gradient magnetic field in an aortic direction, the aortic direction being a direction in which an aorta is disposed within an object; and an image processor configured to receive, from the signal transceiver, phase signal data obtained by applying the bipolar gradient magnetic field to the object, acquire motion data representing a first motion corresponding to a heartbeat of the object and a second motion corresponding to a respiration of the object based on the phase signal data, and acquire MRI data based on the motion data.

Abstract translation: 磁共振成像MRI）装置，包括信号收发器; 控制器，被配置为控制所述信号收发器以在主动脉方向施加双极梯度磁场，所述主动脉方向是主动脉置于物体内的方向; 以及图像处理器，被配置为从所述信号收发器接收通过将双极梯度磁场施加到所述对象而获得的相位信号数据，获取表示对应于所述对象的心跳的第一运动的运动数据和对应于呼吸的第二运动 基于相位信号数据，并且基于运动数据获取MRI数据。