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：US09903925B2

公开(公告)日：2018-02-27

申请号：US13921724

申请日：2013-06-19

Applicant: Korea Research Institute of Standards and Science

Inventor： Ki Woong Kim ,  Seong-Joo Lee ,  Chan Seok Kang ,  Seong-min Hwang ,  Yong-Ho Lee

IPC: G01V3/00 ,  G01R33/36 ,  G01R33/28 ,  G01R33/44 ,  G01R33/62 ,  G01R33/30 ,  G01R33/32 ,  G01R33/48

CPC classification number: G01R33/36 ,  G01R33/282 ,  G01R33/307 ,  G01R33/326 ,  G01R33/3607 ,  G01R33/445 ,  G01R33/4826 ,  G01R33/62

Abstract: Provided are a low-field nuclear magnetic resonance device and a low-field nuclear magnetic resonance method. The low-field nuclear magnetic resonance device includes a dynamic nuclear polarization (DNP) amplification unit to amplify the nuclear polarization of hydrogen atoms of water using a DNP-possible substance (DNP substance) to provide the amplified nuclear polarization to a measurement target, a sensor unit to measure a magnetic resonance signal of the measurement target using a SQUID sensor or an optically-pumped atomic magnetometer, and a measurement field coil to apply a measurement field to the measurement target. The DNP amplification unit is separated from the measurement target, the sensor unit, and the measurement field coil.