Double Relaxation Oscillation SQUID Systems for Biomagnetic Multichannel Measurements(SQUIDs, <Special Section>Superconducting Electronic Devices and Their Applications)
スポンサーリンク
概要
- 論文の詳細を見る
Multichannel superconducting quantum interference device (SQUID) systems based on double relaxation oscillation SQUIDs (DROS) were developed for measuring magnetocardiography (MCG) and magnetoencephalography (MEG) signals. Since DROS provides large flux-to-voltage transfer coefficients, about 10 times larger than the DC SQUIDs, direct readout of the SQUID output was possible using compact room-temperature electronics. Using DROSs, we fabricated two types of multichannel systems ; a 37-channel magnetometer system with circular sensor distribution for measuring radial components of MEG signals, and two planar gradiometer systems of 40-channel and 62-channel measuring tangential components of MCG or MEG signals. The magnetometer system has external feedback to eliminate magnetic coupling with adjacent channels, and reference vector magnetometers were installed to form software gradiometers. The field noise of the magnetometers is around 3 fT/√<Hz> at 100 Hz inside a magnetically shielded room. The planar gradiometer systems have integrated first-order gradiometer in thin-film form with a baseline of 40 mm. The magnetic field gradient noise of the planar gradiometers is about 1 fT/cm/√<Hz> at 100 Hz. The planar gradiometers were arranged to measure field components tangential to the body surface, providing efficient measurement of especially MCG signals with smaller sensor coverage than the conventional normal component measurements.
- 社団法人電子情報通信学会の論文
- 2005-02-01
著者
-
Kim Jin-mok
Korea Research Institute Of Standards And Science
-
Kim I‐s
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
-
Kim I‐s
Korea Research Institute Of Standards And Science
-
Kim Jin
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
-
Kwon Hyuk
Korea Research Institute Of Standards And Science
-
Kim K
Korea Res. Inst. Of Standards And Sci. Daejeon Kor
-
Kim Jin-tae
Korea Research Institute Of Standards And Science
-
Lee Yong
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
-
Kwon H
Korea Res. Inst. Of Standards And Sci. Daejeon Kor
-
Kwon Hyukchan
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
-
KIM Kiwoong
The authors are with Biomagnetism Research Center, Korea Research Institute of Standards and Science
-
KIM In
The authors are with Biomagnetism Research Center, Korea Research Institute of Standards and Science
-
PARK Yong
The authors are with Biomagnetism Research Center, Korea Research Institute of Standards and Science
-
Park Yong
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
-
Lee Yong-hee
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
-
Kim In
The Authors Are With Biomagnetism Research Center Korea Research Institute Of Standards And Science
関連論文
- Magnetic Dispersion of the Late Repolarization in Brugada Syndrome
- Low Noise Directly-Coupled High T_c dc Superconducting Quantum Interference Device Magnetometers for Magnetocardiogram
- Surface Properties of a YBa_2Cu_3O_ Thin Film After Photo-Lithographic Treatment
- Characteristics of Directly-Coupled High-T_c Superconducting Quantum Interference Device Magnetometers for Multichannel Applications
- Surface Resistance Measurement on YBCO Thin Film and Bulk Plate by a Modified Parallel-Plate Resonator Method
- Localization of current dipoles with 40 channel tangential components of neuromagnetic fields
- Double Relaxation Oscillation SQUID Systems for Biomagnetic Multichannel Measurements(SQUIDs, Superconducting Electronic Devices and Their Applications)
- Oscillatory Behavior of Nonlocal Electrical Properties in Mesoscopic AlGaAs/GaAs Two-Dimensional Electron Gas Wire Structures
- Anomalous Magnetoresistance near Superconducting Transition Temperature in a Mesoscopic Aluminum Wire
- Variation of the Preferred Orientation with Thickness in Barium Titanate Thin Films Prepared by Pulsed Laser Deposition
- Effect of Ambient Gas Pressure on the Preferred Orientation of Barium Titanate Thin Films Prepared by Pulsed Laser Deposition
- MEG study on neural activities associated with syntactic and semantic violations in spoken Korean sentences
- High Index-Contrast 2D Photonic Band-Edge Laser(Photonic Crystals and Their Device Applications)
- A Delay Variation-Based Fair Queueing (DVFQ) Algorithm for Real-Time Multimedia Traffic in ATM Networks
- A Novel Hybrid CDMA/TDMA Protocol with a Reservation Request Slot for Wireless ATM Networks
- MAC Protocols Supporting ITU-T Recommendation G.983.1 for Multimedia Services over ATM-Based PON
- A MAC Scheme Based on the Cell Arrival Timing Information for Multimedia Services over ATM-Based PON
- Dynamic Resource Allocation Scheme in Multi-Service CDMA Systems(Resource Management)(Networking Technologies for Mobile Internet Systems)
- Quantum Paraelectricity in a Perovskite La_Na_TiO_3
- Delay Distribution of Data Calls in Integrated Voice/Data CDMA Systems(Wireless Communication Technologies)
- Performance Analysis of CDMA Mobile System Employing LPA Smart Antenna(Antennas and Propagation)
- Performance of Cellular CDMA Systems Using SBF and TBF Array Antennas under Multi-Cell Environment(Spread Spectrum Technologies and Applications)
- Performance Comparison of Fast FH-FDMA Systems with Diversity Combining Receivers under Multitone Interference(Wireless Communication Technology)
- BER Performance of Satellite On-Board Processing Techniques with FH-MFSK Modulation under Various Interferences(Satellite and Space Communications)
- Sensitivity of SNR Degradation of OFDM to Carrier Frequency Offset in Shadowed Two-Path Channels(Wireless Communication Technology)
- Sensitivity of SNR Degradation of OFDM to Carrier Frequency Offset in Shadowed Two-Path Channels
- Sensitivity Analysis of Fast Frequency Hopping Multiple Access Systems due to the Frequency Offset under Rician Fading(Wireless Communication Technology)
- Capacity of CDMA Systems Supporting Heterogeneous Traffic with Binomial Random ON/OFF Activity(Wireless Communication Technology)
- Performance Comparison of FH-MFSK System with Various Diversity Combining Schemes under Worst Case Partial Band Jamming
- BER Performance of Satellite On-Board Processing Techniques with FH-MFSK Modulation under Various Interferences (2002 Joint Conference on Satellite Communications (JC-SAT 2002)--衛星通信技術及び一般)
- Performance Comparison of CDX- and TDX-Based Packet Scheduling Schemes in DS/CDMA Downlink(Special Issue on Mobile Multimedia Communications)
- Packet Error Performance of Hybrid FDMA/CDMA Systems in Frequency Selective Rayleigh Fading
- Subchannel Power Control in the OFDM System to Improve BER Performance under Multipath Channels(Wireless Communications Issue)
- Two Traffic Parameters Efficiently to Approximate the Call Blocking Probability in CDMA Systems with 3 Sectors
- Orthogonal Multicarrier-CDMA Technique with MRC Scheme on Two-Ray Multipath Fading Channels
- Magnetic Properties of 8H-Type Hexagonal Ba(Na_Ru_)O_3
- Madelung Constant of the Tetragonal K_2NiF_4 Type Oxides
- 28p-PS-14 Change of Electronic Properties of BaSnO_3 in Substitution of Sb for Sn
- Sensitivity of the System Capacity with Respect to the System Reliability in a DS-CDMA Cellular System
- Performance Analysis of Orthogonal Multicarrier-CDMA on Two-Ray Multipath Fading Channels
- Modified Gaussian Analysis Method of the OFDM System with the Frequency Offset
- Non-Invasive Magnetocardiography for the Early Diagnosis of Coronary Artery Disease in Patients Presenting With Acute Chest Pain