All-planar SQUIDs and pickup coils for combined MEG and MRI

Juho Luomahaara; P.T. Vesanen; J. Penttilä; J.O. Nieminen; J. Dabek; J. Simola; Mikko Kiviranta; Leif Grönberg; C.J. Zevenhoven; R.J. Ilmoniemi; Juha Hassel

doi:10.1088/0953-2048/24/7/075020

All-planar SQUIDs and pickup coils for combined MEG and MRI

Juho Luomahaara (Corresponding Author), P.T. Vesanen, J. Penttilä, J.O. Nieminen, J. Dabek, J. Simola, Mikko Kiviranta, Leif Grönberg, C.J. Zevenhoven, R.J. Ilmoniemi, Juha Hassel

Research output: Contribution to journal › Article › Scientific › peer-review

25 Citations (Scopus)

Abstract

Flux trapping and random flux movement are common problems in superconducting thin-film devices. Ultrasensitive magnetic field sensors based on superconducting quantum interference devices (SQUIDs) coupled to large pickup coils are especially vulnerable to strong external fields. The issue has become particularly relevant with the introduction of SQUID-based ultra-low-field (ULF) nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) techniques. In this paper, we study the constraints of thin-film-based magnetometers and gradiometers as exposed to magnetic field sequences of ULF MRI. In particular, we address issues such as response recovery, transient noise, magnetization and behaviour under shielded room conditions after prepolarization. As a result, we demonstrate sensors that are suitable for a combined multi-channel magnetoencephalography (MEG) and MRI imaging system.

Original language	English
Article number	075020
Number of pages	7
Journal	Superconductor Science and Technology
Volume	24
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/24/7/075020
Publication status	Published - 2011
MoE publication type	A1 Journal article-refereed

Access to Document

10.1088/0953-2048/24/7/075020

Cite this

@article{07c83fd0f49b4d76bf247ad1ba05c691,

title = "All-planar SQUIDs and pickup coils for combined MEG and MRI",

abstract = "Flux trapping and random flux movement are common problems in superconducting thin-film devices. Ultrasensitive magnetic field sensors based on superconducting quantum interference devices (SQUIDs) coupled to large pickup coils are especially vulnerable to strong external fields. The issue has become particularly relevant with the introduction of SQUID-based ultra-low-field (ULF) nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) techniques. In this paper, we study the constraints of thin-film-based magnetometers and gradiometers as exposed to magnetic field sequences of ULF MRI. In particular, we address issues such as response recovery, transient noise, magnetization and behaviour under shielded room conditions after prepolarization. As a result, we demonstrate sensors that are suitable for a combined multi-channel magnetoencephalography (MEG) and MRI imaging system.",

author = "Juho Luomahaara and P.T. Vesanen and J. Penttil{\"a} and J.O. Nieminen and J. Dabek and J. Simola and Mikko Kiviranta and Leif Gr{\"o}nberg and C.J. Zevenhoven and R.J. Ilmoniemi and Juha Hassel",

year = "2011",

doi = "10.1088/0953-2048/24/7/075020",

language = "English",

volume = "24",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

publisher = "Institute of Physics IOP",

number = "7",

}

TY - JOUR

T1 - All-planar SQUIDs and pickup coils for combined MEG and MRI

AU - Luomahaara, Juho

AU - Vesanen, P.T.

AU - Penttilä, J.

AU - Nieminen, J.O.

AU - Dabek, J.

AU - Simola, J.

AU - Kiviranta, Mikko

AU - Grönberg, Leif

AU - Zevenhoven, C.J.

AU - Ilmoniemi, R.J.

AU - Hassel, Juha

PY - 2011

Y1 - 2011

N2 - Flux trapping and random flux movement are common problems in superconducting thin-film devices. Ultrasensitive magnetic field sensors based on superconducting quantum interference devices (SQUIDs) coupled to large pickup coils are especially vulnerable to strong external fields. The issue has become particularly relevant with the introduction of SQUID-based ultra-low-field (ULF) nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) techniques. In this paper, we study the constraints of thin-film-based magnetometers and gradiometers as exposed to magnetic field sequences of ULF MRI. In particular, we address issues such as response recovery, transient noise, magnetization and behaviour under shielded room conditions after prepolarization. As a result, we demonstrate sensors that are suitable for a combined multi-channel magnetoencephalography (MEG) and MRI imaging system.

AB - Flux trapping and random flux movement are common problems in superconducting thin-film devices. Ultrasensitive magnetic field sensors based on superconducting quantum interference devices (SQUIDs) coupled to large pickup coils are especially vulnerable to strong external fields. The issue has become particularly relevant with the introduction of SQUID-based ultra-low-field (ULF) nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) techniques. In this paper, we study the constraints of thin-film-based magnetometers and gradiometers as exposed to magnetic field sequences of ULF MRI. In particular, we address issues such as response recovery, transient noise, magnetization and behaviour under shielded room conditions after prepolarization. As a result, we demonstrate sensors that are suitable for a combined multi-channel magnetoencephalography (MEG) and MRI imaging system.

U2 - 10.1088/0953-2048/24/7/075020

DO - 10.1088/0953-2048/24/7/075020

M3 - Article

SN - 0953-2048

VL - 24

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 7

M1 - 075020

ER -

All-planar SQUIDs and pickup coils for combined MEG and MRI

Abstract

Access to Document

Fingerprint

Cite this