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Titolo:
MEASUREMENT OF BRAIN-STEM AUDITORY-EVOKED MAGNETIC-FIELDS USING A HIGHLY SENSITIVE SQUID MAGNETOMETER WITH A VARIABLE BASE-LINE
Autore:
IRAMINA K; UENO S;
Indirizzi:
KYUSHU UNIV,DEPT COMP SCI & COMMUN ENGN FUKUOKA 81281 JAPAN UNIV TOKYO,FAC MED,INST MED ELECTR TOKYO 113 JAPAN
Titolo Testata:
IEEE transactions on magnetics
fascicolo: 6, volume: 31, anno: 1995,
parte:, 2
pagine: 4271 - 4273
SICI:
0018-9464(1995)31:6<4271:MOBAMU>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
K. Iramina e S. Ueno, "MEASUREMENT OF BRAIN-STEM AUDITORY-EVOKED MAGNETIC-FIELDS USING A HIGHLY SENSITIVE SQUID MAGNETOMETER WITH A VARIABLE BASE-LINE", IEEE transactions on magnetics, 31(6), 1995, pp. 4271-4273

Abstract

This study focuses on the detection of ABR (auditory evoked brainstemresponse) magnetic fields using a SQUID magnetometer, The ABR magnetic field is a very weak signal with an intensity of less than 10-14 T which is near the limits of sensitivity of the SQUID magnetometer, We developed a highly sensitive dc-SQUID magnetometer. It has a first-order gradiometer with a variable baseline, i.e., the distance between twoco-axial coils which are wound in opposite directions to reduce the environmental magnetic noise. In this system, one can choose the best pick-up coil to reduce the environmental magnetic noise. We tried to measure ABR magnetic fields using three gradiometers. It was possible todetect the ABR magnetic fields using a 50-mm baseline gradiometer. Wealso studied the optimum baseline to measure magnetic fields by computer simulation.

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Documento generato il 10/04/20 alle ore 02:17:15