OPERATION OF A HYBRID 28-CHANNEL NEUROMAGNETOMETER

被引：7

作者：

Foglietti, V. ^{[1
]}

Pasquarelli, A. ^{[1
]}

Pizzella, V. ^{[1
]}

Torrioli, G. ^{[1
]}

Romani, G. L. ^{[2
]}

Casciardi, S. ^{[2
]}

Gallagher, W. J. ^{[3
]}

Ketchen, M. B. ^{[3
]}

Kleinsasser, A. W. ^{[3
]}

Sandstrom, R. L. ^{[3
]}

机构：

[1] IESS CNR, Via Cineto Romano 42, Rome, Italy

[2] Univ Chieti, Ist Fis Med, Chieti, Italy

[3] IBM Corp, TJ Watson Res Ctr, Yorktown Hts, NY USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期

关键词：

14;

D O I：

10.1109/77.233311

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A 28-channel system for neuromagnetic measurements is operative at CNR-IESS in Roma. The instrument uses 28 Nb/PbAuIn dc-SQUID sensors coupled with a flux transformer configuration. The detection coils are arranged on concentric circumferences. In the internal circles are arranged 16 axial first-order gradiometers whereas the external circle is made by 12 first-order planar gradiometers. The vertical gradiometers show a white noise level of similar or equal to 5 fT/root Hz while the planar ones have a noise similar or equal to 6fT/cm root Hz, with a 1/f corner at a few Hz. The evoked potentials of normal subjects and patients affected by various kind of vascular disturbances has been studied. The system has succeeded in "one shot" localization of some cortical activity. The instrument has also been used to record the spontaneous brain activity in patients affected by focal epilepsy.

引用

页码：1890 / 1893

页数：4

共 13 条

[1] MULTICHANNEL SQUID SYSTEMS FOR BRAIN RESEARCH [J].

AHONEN, AI ;

HAMALAINEN, MS ;

KAJOLA, MJ ;

KNUUTILA, JET ;

LOUNASMAA, OV ;

SIMOLA, JT ;

TESCHE, CD ;

VILKMAN, VA .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (02) :2786-2792

[2]

Brake H. J. M., 1986, CRYOGENICS, V26, P667

[3]

CTF Systam Inc, 15 1750 MC LEAN AV

[4]

Del Gratta C., COMMUNICATION

[5] DC SQUID SYSTEMS OVERVIEW [J].

DRUNG, D .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1991, 4 (09) :377-385

[6] 28-CHANNEL HYBRID SYSTEM FOR NEUROMAGNETIC MEASUREMENTS [J].

FOGLIETTI, V ;

DELGRATTA, C ;

PASQUARELLI, A ;

PIZZELLA, V ;

TORRIOLI, G ;

ROMANI, GL ;

GALLAGHER, WJ ;

KETCHEN, MB ;

KLEINSASSER, AW ;

SANDSTROM, RL .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (02) :2959-2962

[7] PERFORMANCE OF DC SQUIDS WITH RESISTIVELY SHUNTED INDUCTANCE [J].

FOGLIETTI, V ;

GALLAGHER, WJ ;

KETCHEN, MB ;

KLEINSASSER, AW ;

KOCH, RH ;

SANDSTROM, RL .

APPLIED PHYSICS LETTERS, 1989, 55 (14) :1451-1453

[8]

Foglietti V., 1991, IEEE T MAGN, V27, P2989

[9]

Peresson M., ADV BIOMAGA IN PRESS

[10]

Pizzella V., BRAIN TOPOGRAP UNPUB

← 1 2 →