公开(公告)号：US09245321B2

公开(公告)日：2016-01-26

申请号：US14271710

申请日：2014-05-07

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Hyun Wook Park ,  Jun Young Chung ,  Dong Chan Kim ,  Joon Sung Choi ,  Ye Ji Han

IPC: G06K9/00 ,  G01R33/561 ,  G06T5/00 ,  G06T7/00

CPC classification number: G06T5/001 ,  G01R33/5611 ,  G06T7/0012

Abstract: A method for a parallel image reconstruction is disclosed. The method includes (a) acquiring image information by channel via parallel coils in a magnetic resonance imaging (MRI) scanner; (b) extracting low-frequency signals from the image information; (c) reconstructing low-frequency images from the low-frequency signals; (d) generating filter banks by using the low-frequency images; and (f) reconstructing a final image by using the filter banks. The generating of the filter banks includes separately generating low-frequency image information for reconstruction of magnitude information and low-frequency image information for reconstruction of phase information, and then separately generating a filter for reconstruction of the magnitude information and a filter for reconstruction of the phase information.

Abstract translation: 公开了一种并行图像重建方法。 该方法包括（a）通过磁共振成像（MRI）扫描仪中的并行线圈通过信道获取图像信息; （b）从图像信息中提取低频信号; （c）从低频信号重建低频图像; （d）使用低频图像产生滤波器组; 和（f）通过使用滤波器组来重构最终图像。 滤波器组的产生包括分别产生用于重建幅度信息的低频图像信息和用于重建相位信息的低频图像信息，然后分别生成用于重建幅度信息的滤波器和用于重建的信号的滤波器 相位信息。

公开(公告)号：US10295643B2

公开(公告)日：2019-05-21

申请号：US14804678

申请日：2015-07-21

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Korea Advanced Institute of Science and Technology

Inventor： Hyun Wook Park ,  Yong Wan Lim ,  Ye Ji Han

IPC: G01R33/567 ,  G01R33/48

Abstract: A magnetic resonance imaging (MRI) apparatus and a control method thereof are provided. The MRI apparatus includes a scanner, and a controller configured to control the scanner to receive magnetic resonance (MR) signals corresponding to a magnitude of a y-axis gradient magnetic field in a respiration cycle of a patient, each of the MR signals being received at a time interval equal to a time period of the respiration cycle over a number of the received MR signals. The MRI apparatus further includes a processor configured to extract an MR signal received in a respiration condition of the patient from the received MR signals, fill a k-space with the extracted MR signal, and generate an MR image by reconstructing data of the filled k-space.

公开(公告)号：US09291693B2

公开(公告)日：2016-03-22

申请号：US13672289

申请日：2012-11-08

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

Inventor： Hyun Wook Park ,  Ye Ji Han

IPC: G01V3/00 ,  G01R33/565 ,  G01R33/48 ,  G01R33/56

CPC classification number: G01R33/56527 ,  G01R33/4828 ,  G01R33/5607

Abstract: The magnetic resonance imaging apparatus includes a main magnet to generate a static magnetic field in an imaging region, a gradient coil assembly to form a gradient in the static magnetic field, a radio frequency (RF) coil assembly to apply a first RF pulse and second RF pulse with respect to n (n≧2) slice regions located at different positions in the imaging region, to excite atomic nuclei of the slice regions, and a controller to control the RF coil assembly to apply a first RF pulse and second RF pulse having a first center frequency f0 to a first slice and to apply a first RF pulse having a second center frequency f0+fs1 and a second RF pulse having a third center frequency f0−fs1 to a second slice.

Abstract translation: 磁共振成像设备包括：主磁体，用于在成像区域中产生静磁场;梯度线圈组件，用于在静磁场中形成梯度;射频（RF）线圈组件，用于施加第一RF脉冲和第二 相对于位于成像区域的不同位置的n（n≥2）个切片区域的RF脉冲，以激发切片区域的原子核，以及控制器，控制RF线圈组件以施加第一RF脉冲和第二RF脉冲 具有第一中心频率f0到第一切片，并且将具有第二中心频率f0 + fs1的第一RF脉冲和具有第三中心频率f0-fs1的第二RF脉冲施加到第二切片。

公开(公告)号：US09945921B2

公开(公告)日：2018-04-17

申请号：US14504769

申请日：2014-10-02

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  Korea Advanced Institute Of Science and Technology

Inventor： Hyun Wook Park ,  Ye Ji Han ,  Jae Moon Jo

IPC: G01V3/00 ,  G01R33/563 ,  G01R33/565 ,  G01R33/54

CPC classification number: G01R33/56383 ,  G01R33/4835 ,  G01R33/543 ,  G01R33/56509

Abstract: An MRI apparatus performs an MRI while moving a patient table and includes a main magnet configured to generate a static magnetic field in a bore; a gradient coil assembly configured to apply a gradient signal to the static magnetic field to generate a magnetic field gradient; an RF coil assembly configured to apply an RF excitation signal and an RF refocusing signal; and a controller configured to control the RF refocusing signal so that a slice to which the RF refocusing signal is to be applied conforms to the slice to which the RF excitation signal has been applied.