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公开(公告)号：US11255932B2
公开(公告)日：2022-02-22
申请号：US16572254
申请日：2019-09-16
Inventor： Hyo-Bong Hong , Jae-Chan Jeong , Seung-Min Choi , Jin-Sun Kim
IPC: G01R33/12 , G01R33/385
Abstract: Disclosed herein are a magnetic-field-generating coil system, an imaging system having the magnetic-field-generating coil system, and a method for operating the imaging system. The method for operating an imaging system includes generating multiple Linear Gradient Fields (LGFs) in respective axial directions by controlling coil currents, and acquiring MRI information or Magnetic Particle Imaging (MPI) information about an object while moving the multiple LGFs by varying the coil currents.
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公开(公告)号：US11480634B2
公开(公告)日：2022-10-25
申请号：US17318753
申请日：2021-05-12
Inventor： Eul-Gyoon Lim , Jin-Sun Kim , Chang-Beom Kim , Jae-Chan Jong , Seung-Min Choi , Hyo-Bong Hong
IPC: G01R33/12 , A61B5/0515 , G01B21/22
Abstract: Disclosed herein is a nano-magnetic-particle-imaging apparatus, including a measurement head including excitation and detection coils and accommodating a sample bed for a sample including nano magnetic particles; a gradient magnetic field generation unit for generating a magnetic field having a strength equal to or greater than that of the saturation magnetic field of the nano magnetic particles in a spacing area between identical magnetic poles facing each other and forming a field-free region in a portion thereof; a first driving unit for linearly moving the sample bed; a second driving unit for rotating the gradient magnetic field generation unit in a plane; a third driving unit for linearly reciprocating the gradient magnetic field generation unit; and a control unit for applying a signal to the excitation coil, controlling the driving units, and imaging 3D distribution of the nano magnetic particles based on a detection signal output from the detection coil.
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3.发明授权公开(公告)号：US11035710B2
公开(公告)日：2021-06-15
申请号：US16554326
申请日：2019-08-28
Inventor： Hyo-Bong Hong , Jae-Chan Jong , Seung-Min Choi
IPC: G01F1/716
Abstract: Disclosed herein are a method and apparatus for measuring flow using an electromagnetic resonance phenomenon. The flowmeter includes an RF resonator in the form of a cylinder into which a transmission antenna for forming a magnetic field in a preset frequency range and a reception antenna for measuring a response signal are inserted, the RF resonator being shielded from an external magnetic field; and a processor for measuring the flow in a pipe that passes through the RF resonator based on the response signal. The RF resonator includes circular holes in the two bases of the cylinder so as to enable the pipe to pass through the RF resonator, and is formed with a first body and a second body, which are split in the height direction of the cylinder and are coupled using a coupling member so as to wrap the outer circumferential surface of the pipe.
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公开(公告)号：US10948556B2
公开(公告)日：2021-03-16
申请号：US16205044
申请日：2018-11-29
Inventor： Hyo-Bong Hong , Jae-Chan Jeong , Seung-Min Choi , Chang-Beom Kim
Abstract: Disclosed herein are a method for modifying a magnetic field using magnetic nanoparticles and an apparatus therefor. The method for modifying a magnetic field includes applying current to a single solenoid coil or to two parallel solenoid coils, measuring a strength of a magnetic field generated by the current at a preset target location using a measurement sensor, and controlling the strength of the magnetic field based on a concentration of a magnetic nanoparticle sample mounted in the single solenoid coil or the two solenoid coils so that the strength of the magnetic field matches a preset target value.
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Patent Agency Ranking
公开(公告)号：US11561270B2
公开(公告)日：2023-01-24
申请号：US16939983
申请日：2020-07-27
Inventor： Jae-Chan Jong , Seung-Min Choi , Hyo-Bong Hong
IPC: G01R33/12 , G01R33/34 , A61B5/0515
Abstract: Disclosed herein are an apparatus and method for imaging nano magnetic particles. The apparatus may include a measurement head in which a through hole for accommodating a sample including nano magnetic particles is formed and in which an excitation coil and a detection coil are installed, a field-free region generation unit for forming a field-free region, in which there are few or no magnetic fields, in a spacing area between the identical magnetic poles that face each other, and a control unit for applying a signal to the excitation coil when the measurement head is located inside the spacing area of the field-free region generation unit, controlling the field-free region so as to move in the sample, and imaging the 3D positional distribution of the nano magnetic particles included in the sample based on a detection signal output from the detection coil.
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公开(公告)号：US10365284B2
公开(公告)日：2019-07-30
申请号：US15807454
申请日：2017-11-08
Inventor： Hyo-Bong Hong , Seung-Min Choi , Jae-Chan Jeong
IPC: G01N33/574 , G01N1/40 , G01N33/543 , G01N33/68 , B01L3/00
Abstract: This invention relates to a kit for detecting a target material and a method of detecting a target material using the same.
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公开(公告)号：US10139214B2
公开(公告)日：2018-11-27
申请号：US15183639
申请日：2016-06-15
Inventor： Hyo-Bong Hong , Seung-Min Choi , Chang-Beom Kim
IPC: G01B7/004
Abstract: Disclosed herein are an apparatus for acquiring the location coordinates of an object to be measured using two measurement heads and a method using the apparatus. The apparatus for acquiring the location coordinates of an object includes two measurement heads for individually detecting a signal corresponding to the object to be measured, a measurement head fixing unit for placing the two measurement heads so as to face each other with the object therebetween, a rotatable structure for rotating the measurement head fixing unit, and a location determination unit for acquiring the location coordinates of the object to be measured based on the strengths of the two detection signals detected by the measurement heads.
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公开(公告)号：US10830733B2
公开(公告)日：2020-11-10
申请号：US15870565
申请日：2018-01-12
Inventor： Hyo-Bong Hong , Jae Chan Jeong , Seung-Min Choi , Chang-Beom Kim
Abstract: Disclosed herein are a method and apparatus for scanning a multilayer material using magnetism. The apparatus for scanning a multilayer material includes at least one measurement head for exciting a mixed magnetic field on a multilayer specimen using at least one excitation solenoid coil and detecting detection signals from the multilayer specimen using a detection solenoid coil, a movement controller for moving any one of the at least one measurement head and a stage on which the multilayer specimen is placed in order to detect detection signals for all parts of the multilayer specimen, and a signal controller for generating two excitation signals having different frequencies in order to generate the mixed magnetic field and for generating a scanning result for the multilayer specimen by collecting the detection signals.
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公开(公告)号：US10267867B2
公开(公告)日：2019-04-23
申请号：US15657367
申请日：2017-07-24
Inventor： Seung-Min Choi , Jae-Chan Jeong , Hyo-Bong Hong , Sung-Woong Shin , Jae-Il Cho
Abstract: Disclosed herein are a signal transmission/reception method for signal analysis in FMMD technology and an apparatus using the method. A signal transmission apparatus includes a signal generation unit for generating two sine wave signals having different frequencies in consideration of a voltage of an excitation coil included in a magnetic particle measurement sensor, a signal addition unit for generating an input signal for producing a magnetic field by electronically adding the two sine wave signals, a differential signal generation unit for generating a differential signal for the input signal to minimize transmission noise, and a signal transmission unit for amplifying voltages of the input signal and the differential signal and transmitting the amplified input signal and differential signal to the excitation coil so as to produce a magnetic field in the excitation coil and apply the magnetic field to a measurement target sample.
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