公开(公告)号：US20170053402A1

公开(公告)日：2017-02-23

申请号：US15307936

申请日：2015-04-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Artem Sergeevich MIGUKIN ,  Dmitry Alexandrovich KOROBCHENKO ,  Mikhail Yurievich SIROTENKO ,  Kirill Arthurovich GAVRILYUK ,  Praveen GULAKA ,  Sang-cheon CHOI ,  Michail Nikolaevich RYCHAGOV ,  Yang Lim CHOI

IPC: G06T7/00 ,  A61B5/00 ,  G06T11/00 ,  A61B5/055

CPC classification number: G06T7/0012 ,  A61B5/055 ,  A61B5/7257 ,  A61B2576/00 ,  G01R33/5611 ,  G06T11/003 ,  G06T2207/10088 ,  G06T2207/20081

Abstract: Provided is a magnetic resonance imaging (MRI) apparatus including an acquisition unit configured to acquire an undersampled spectrum in a k-space and a reconstruction unit configured to generate a target image based on the undersampled spectrum, wherein the reconstruction unit includes: a first sub-reconstruction unit configured to perform initial reconstruction on data corresponding to unsampled positions in the k-space by using a Split Bregman algorithm or approximate sparse coding; a second sub-reconstruction unit configured to decompose the initially reconstructed spectrum in the k-space into multiple frequency bands to thereby generate a plurality of individual spectra and perform dictionary learning reconstruction on images respectively corresponding to the decomposed multiple frequency bands by alternating sparse approximation and reconstructing of measured frequencies; and an image generator configured to generate a target image by merging together the reconstructed images respectively corresponding to the multiple frequency bands.

Abstract translation: 提供了一种磁共振成像（MRI）装置，包括：被配置为获取k空间中的欠采样频谱的获取单元和被配置为基于所述欠采样频谱生成目标图像的重建单元，其中，所述重建单元包括：第一子 - 构造单元，被配置为通过使用分割Bregman算法或近似稀疏编码对与k空间中的非取样位置相对应的数据执行初始重构; 第二子重建单元，被配置为将k空间中的初始重建频谱分解成多个频带，从而生成多个单独频谱，并通过交替稀疏近似分别对应于分解的多个频带的图像执行字典学习重建，以及 重建测量频率; 以及图像生成器，被配置为通过将分别对应于所述多个频带的重建图像合并在一起来生成目标图像。

公开(公告)号：US20140210467A1

公开(公告)日：2014-07-31

申请号：US14167152

申请日：2014-01-29

Applicant: The Trustees of the University of Pennsylvania ,  Samsung Electronics Co., Ltd.

Inventor： Jin Young HWANG ,  Joon Soo KIM ,  Jae Moon JO ,  Yang Lim CHOI ,  Jongho LEE

IPC: G01R33/56

CPC classification number: G01R33/56 ,  G01R33/5602 ,  G01R33/5615 ,  G01R33/56536

Abstract: An MRI system acquires a susceptibility-weighted image by acquiring a first RF echo signal in a first echo time for providing an image exclusive of susceptibility-weighting and acquiring a second RF echo signal in a second echo time longer than the first echo time for providing an image including susceptibility-weighting. A compensation gradient field is applied for compensating for field inhomogeneity and in response, a third RF echo signal is acquired in a third echo time longer than the second echo time. First, second and third images are generated in response to data derived from the first, second and third RF echo signals respectively and data of the first, second and third images is combined to provide image data representing an image compensating for magnetic resonance signal attenuation in the second image.

Abstract translation: MRI系统通过在第一回波时间中获取第一RF回波信号来获取敏感度加权图像，以提供除了敏感度加权之外的图像，并且以比第一回波时间长的第二回波时间获取第二RF回波信号，以提供 包括敏感度加权的图像。 应用补偿梯度场来补偿场不均匀性，作为响应，在比第二回波时间长的第三回波时间中获取第三RF回波信号。 首先，响应于分别从第一，第二和第三RF回波信号导出的数据产生第二和第三图像，并且组合第一，第二和第三图像的数据以提供表示补偿磁共振信号衰减的图像的图像数据 第二个图像。

公开(公告)号：US20160018487A1

公开(公告)日：2016-01-21

申请号：US14804408

申请日：2015-07-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Praveen GULAKA ,  Yang Lim CHOI ,  Byoung Mock KAHM ,  Sung We PARK ,  Young Jae CHAE ,  Hyun Hee JO

IPC: G01R33/30 ,  G01R33/385 ,  G01R33/28

CPC classification number: G01R33/283 ,  G01R33/288

Abstract: A magnetic resonance imaging apparatus having a display and a method for controlling the same are provided. A magnetic resonance imaging apparatus includes a magnet assembly; a transfer table configured to move into the magnet assembly or out of the magnet assembly; and a display configured to move into the transfer table or move out of the transfer table.

Abstract translation: 提供具有显示器的磁共振成像设备及其控制方法。 磁共振成像装置包括磁体组件; 转移台，其构造成移动到所述磁体组件中或者从所述磁体组件移出; 以及被配置为移动到所述传送台中或移出所述传送台的显示器。

公开(公告)号：US20150160319A1

公开(公告)日：2015-06-11

申请号：US14501195

申请日：2014-09-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sang Cheon CHOI ,  Joon Soo KIM ,  Yeol Min SEONG ,  Yang Lim CHOI ,  Praveen GULAKA

IPC: G01R33/561 ,  G01R33/341 ,  G01R33/34 ,  G01R33/48 ,  G01R33/54

CPC classification number: G01R33/5611

Abstract: An MRI apparatus includes: a receive coil assembly including channels, and configured to receive an MR signal from an object; a data generator configured to generate undersampled image data on a k-space based on the MR signal; and a reconstructed image generator configured to generate a first reconstructed image from the undersampled image data using a parallel imaging method, and a second reconstructed image from the undersampled image data using compressed sensing. According to the MRI apparatus, since image reconstruction is performed using random undersampled image data, a parallel imaging method, and compressed sensing, it is possible to increase a speed of image acquisition and, at the same time, to improve the quality of images.

Abstract translation: MRI装置包括：包括通道的接收线圈组件，并且被配置为从对象接收MR信号; 数据生成器，被配置为基于所述MR信号在k空间上生成欠采样图像数据; 以及重构图像生成器，被配置为使用并行成像方法从来自欠采样图像数据生成第一重建图像，以及使用压缩感测从来自欠采样图像数据的第二重建图像生成。 根据MRI装置，由于使用随机欠采样图像数据，并行成像方法和压缩感测进行图像重建，因此可以增加图像采集的速度，并且同时提高图像的质量。