公开(公告)号：US11064900B2

公开(公告)日：2021-07-20

申请号：US16085488

申请日：2017-04-03

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Seong-Joo Lee ,  Kiwoong Kim ,  Jeong-Hyun Shim ,  Kwon-Kyu Yu ,  Seong-min Hwang

IPC: A61B5/055 ,  G01R33/48 ,  G01R33/381 ,  G01R33/32 ,  G01R33/56 ,  A61B5/00 ,  G01R33/24 ,  G01R33/44 ,  G01R33/421

Abstract: Provided are an ultra-low field nuclear magnetic resonance device and a method for measuring an ultra-low field nuclear resonance image. The ultra-low field nuclear magnetic resonance device includes an AC power supply configured to supply a current to a measurement target in such a manner the current flows to the measurement target, magnetic field measurement means disposed adjacent to the measurement target, and measurement bias magnetic field generation means configured to apply a measurement bias magnetic field corresponding to a proton magnetic resonance frequency of the measurement target. A vibration frequency of the AC power supply matches the proton magnetic resonance frequency of the measurement target, and the magnetic field measurement means measures a nuclear magnetic resonance signal generated from the measurement target.

公开(公告)号：US11322288B2

公开(公告)日：2022-05-03

申请号：US16574591

申请日：2019-09-18

Applicant: Korea Research Institute of Standards and Science

Inventor： Seong Min Hwang ,  Jeong Hyun Shim ,  Ingo Hilschenz ,  Seong-Joo Lee ,  Kiwoong Kim

IPC: H01F27/28 ,  H01F27/10 ,  G01R33/34

Abstract: A fluid-cooled electromagnet includes an upper housing, a lower housing vertically aligned with the upper housing, a plurality of pancake coils disposed between the upper housing and the lower housing to be spaced apart from each other and sequentially stacked to have a washer shape, and at least one spacer, disposed between the upper housing and the lower housing, accommodating the pancake coils at regular intervals.

公开(公告)号：US20180330863A1

公开(公告)日：2018-11-15

申请号：US15966904

申请日：2018-04-30

Applicant: Korea Research Institute of Standards and Science

Inventor： Seong-min Hwang ,  Jeong-Hyun Shim ,  Ingo Hilschenz ,  Seong-Joo Lee ,  Kiwoong Kim

IPC: H01F27/10 ,  H01F7/06 ,  H01F27/22

CPC classification number: H01F27/10 ,  H01F7/06 ,  H01F27/22

Abstract: An electromagnet includes insulating cooling plates of a ceramic material which are vertically arranged parallel to each other, washer-shaped insulating center spacers maintained at a constant distance between adjacent insulating cooling plates, pancake coils including Litz wires which are spirally wound on each of the insulating center spacers in the space between the adjacent insulating cooling plates, and a housing which covers at least outer side surfaces of the insulating cooling plates and the pancake coils and provides a coolant to cool the insulating cooling plates.

公开(公告)号：US10162028B2

公开(公告)日：2018-12-25

申请号：US14618535

申请日：2015-02-10

Applicant: Korea Research Institute of Standards and Science

Inventor： Seong-min Hwang ,  Kiwoong Kim ,  Kwon-Kyu Yu ,  Seong-Joo Lee ,  Jeong-Hyun Shim

IPC: G01R33/44 ,  G01R33/3815 ,  G01R33/32 ,  G01R33/34

Abstract: Provided is a low magnetic field and ultra-low magnetic field NMR and MRI apparatus. The low magnetic field and ultra-low magnetic field NMR and MRI apparatus includes a SQUID sensor and a prepolarization magnetic field coil. The prepolarization magnetic field coil generates a prepolarization magnetic field to polarize a sample. The prepolarization magnetic coil generates a counter pulse in a direction opposite to that of the prepolarization magnetic field immediately before or immediately after the prepolarization magnetic field is generated. The counter pulse demagnetizes wanted magnetization including that of the prepolarization magnetic field coil itself.

公开(公告)号：US09759793B2

公开(公告)日：2017-09-12

申请号：US14262251

申请日：2014-04-25

Applicant: Korea Research Institute of Standards and Science

Inventor： Kiwoong Kim ,  Chan-Seok Kang ,  Seong-Joo Lee ,  Yong-ho Lee ,  Kwon-Kyu Yu

IPC: G01V3/00 ,  G01R33/44 ,  G01N24/08 ,  G01R33/32

CPC classification number: G01R33/448 ,  G01N24/08 ,  G01R33/326 ,  G01R33/445

Abstract: Provided are an object discrimination method and an object discrimination apparatus using an ultra-low magnetic field nuclear magnetic resonance (NMR). The method includes measuring the respective spin-lattice relaxation times at a plurality of strengths of prepolarization magnetic fields with respect to a measurement target and classifying the measurement target using the spin-lattice relaxation times.

公开(公告)号：US20160209482A1

公开(公告)日：2016-07-21

申请号：US14618535

申请日：2015-02-10

Applicant: Korea Research Institute of Standards and Science

Inventor： Seong-min Hwang ,  Kiwoong Kim ,  Kwon-Kyu Yu ,  Seong-Joo Lee ,  Jeong-Hyun Shim

IPC: G01R33/44 ,  G01R33/3815 ,  G01R33/32

CPC classification number: G01R33/445 ,  G01R33/326 ,  G01R33/34023 ,  G01R33/3815

Abstract: Provided is a low magnetic field and ultra-low magnetic field NMR and MRI apparatus. The low magnetic field and ultra-low magnetic field NMR and MRI apparatus includes a SQUID sensor and a prepolarization magnetic field coil. The prepolarization magnetic field coil generates a prepolarization magnetic field to polarize a sample. The prepolarization magnetic coil generates a counter pulse in a direction opposite to that of the prepolarization magnetic field immediately before or immediately after the prepolarization magnetic field is generated. The counter pulse demagnetizes wanted magnetization including that of the prepolarization magnetic field coil itself.

Abstract translation: 提供了低磁场和超低磁场NMR和MRI装置。 低磁场和超低磁场NMR和MRI装置包括SQUID传感器和预极化磁场线圈。 预极化磁场线圈产生极化磁极以使样品极化。 前极化磁线圈在产生前极化磁场之前或之后产生与反极化磁场相反方向的计数脉冲。 计数脉冲使包括预极化磁场线圈本身的所需磁化消磁。

公开(公告)号：US20160011278A1

公开(公告)日：2016-01-14

申请号：US14768898

申请日：2013-03-08

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Ki Woong Kim ,  Yong Ho Lee ,  Kwon Kyu Yu ,  Seong-Joo Lee

IPC: G01R33/00 ,  G01R33/025

CPC classification number: G01R33/0076 ,  G01R33/025 ,  H01F13/003 ,  H05K9/0069

Abstract: The present invention relates to a shield apparatus and a shield method for measuring a subtle magnetic field. More specifically, the present invention relates to a shield apparatus having a precise magnetic sensor therein, for shielding an external magnetic field in a subtle magnetic field measurement apparatus including a magnetic field generation apparatus for exciting a sample, the shield apparatus for measuring a subtle magnetic field, including: a shield wall provided with a high-conductivity metal layer of high conductivity being partitioned into a plurality of segments and having a high-frequency shield property and a closed high-permeability soft magnetic layer spaced apart from the high-conductivity metal layer by a predetermined distance, so as to seal a measurement space.

Abstract translation: 本发明涉及一种用于测量微妙磁场的屏蔽装置和屏蔽方法。 更具体地说，本发明涉及一种在其中具有精密磁传感器的屏蔽装置，用于在包括用于激发样品的磁场产生装置的微小磁场测量装置中屏蔽外部磁场，用于测量微妙磁性的屏蔽装置 包括：具有高导电性的高导电性金属层的屏蔽壁被分隔成多个段并具有高频屏蔽特性和与高导电性金属间隔开的封闭的高磁导率软磁性层 层预定距离，以便密封测量空间。

公开(公告)号：US09921280B2

公开(公告)日：2018-03-20

申请号：US14446764

申请日：2014-07-30

Applicant: Korea Research Institute of Standards and Science

Inventor： Kiwoong Kim ,  Yong-ho Lee ,  Seong-Joo Lee ,  Kwon-Kyu Yu

IPC: A61B5/055 ,  G01R33/385 ,  G01R33/32 ,  G01R33/26 ,  G01R33/48 ,  A61B5/05 ,  G01R33/44

CPC classification number: G01R33/385 ,  A61B5/05 ,  A61B5/055 ,  G01R33/26 ,  G01R33/326 ,  G01R33/445 ,  G01R33/48 ,  G01R33/4806

Abstract: Provided are an ultra-low-field nuclear magnetic resonance device and an ultra-low-field nuclear magnetic resonance measuring method. The method includes applying a first measurement bias magnetic field corresponding to an excitation frequency of a coherent biomagnetic field generated in association with the electrophysiological activity of human body organs, applying a second measurement bias magnetic field having the same direction as the first measurement bias magnetic field and having a different magnitude than the first measurement bias magnetic field, and measuring a magnetic resonance signal generated in the human body by using magnetic field measuring means.

公开(公告)号：US09903927B2

公开(公告)日：2018-02-27

申请号：US13909564

申请日：2013-06-04

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Seong-min Hwang ,  Kiwoong Kim ,  Jin Mok Kim ,  Yong-Ho Lee ,  Chan Seok Kang ,  Kwon Kyu Yu ,  Seong-Joo Lee

IPC: G01V3/00 ,  G01R33/421 ,  A61B5/00 ,  A61B5/055 ,  G01R33/44

CPC classification number: G01R33/421 ,  A61B5/0046 ,  A61B5/055 ,  G01R33/445

Abstract: Provided are an apparatus and a method for canceling magnetic fields. The apparatus includes a magnetic field canceling coil disposed adjacent to an inner wall of a magnetic shield room to surround the entire inner space or a portion of an inner space of the magnetic shield room; and a magnetic field canceling coil driver to supply current to the magnetic field canceling coil. The magnetic field canceling coil cancels a prepolarization magnetic field established on the wall of the magnetic shield room by a prepolarization coil disposed in the center of the magnetic shield room to minimize magnetic interference caused by the magnetic shield room.

公开(公告)号：US20140343397A1

公开(公告)日：2014-11-20

申请号：US14446764

申请日：2014-07-30

Applicant: Korea Research Institute of Standards and Science

Inventor： Kiwoong Kim ,  Yong-ho Lee ,  Seong-Joo Lee ,  Kwon-Kyu Yu

IPC: G01R33/385 ,  A61B5/055 ,  A61B5/05 ,  G01R33/48

CPC classification number: G01R33/385 ,  A61B5/05 ,  A61B5/055 ,  G01R33/26 ,  G01R33/326 ,  G01R33/445 ,  G01R33/48 ,  G01R33/4806

Abstract: Provided are an ultra-low-field nuclear magnetic resonance device and an ultra-low-field nuclear magnetic resonance measuring method. The method includes applying a first measurement bias magnetic field corresponding to an excitation frequency of a coherent biomagnetic field generated in association with the electrophysiological activity of human body organs, applying a second measurement bias magnetic field having the same direction as the first measurement bias magnetic field and having a different magnitude than the first measurement bias magnetic field, and measuring a magnetic resonance signal generated in the human body by using magnetic field measuring means.

Abstract translation: 提供了超低场核磁共振装置和超低场核磁共振测量方法。 该方法包括：对应于与人体器官的电生理活动相关联产生的相干生物磁场的激发频率对应的第一测量偏置磁场，施加与第一测量偏置磁场相同方向的第二测量偏置磁场 并且具有与第一测量偏置磁场不同的幅度，并且通过使用磁场测量装置来测量在人体中产生的磁共振信号。