Paper Abstract and Keywords |
Presentation |
2015-12-19 09:50
MR signal detection of hyperpolarized xenon with atomic magnetometers in ultra-low field based on SWIFT approach Yuki Kaga, Takenori Oida, Tetsuya Yamamoto, Tetsuo Kobayashi (Kyoto Univ.) MBE2015-80 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In recent years, ultra-low field MRI (ULF-MRI) has been attracting attention because of its advantages such as low maintenance cost. In ULF-MRI, however, there is a limitation that MR signals become very small in general. Hence, we have tried to visualize hyperpolarized xenon to detect MR signals than those of proton. In addition, MR signals of hyperpolarized xenon decay rapidly when a large gradient field is used in MR signal detection. Meanwhile, the sweep imaging with Fourier transformation (SWIFT) approach has been applied to reduce the decay caused by the diffusion of xenon gas. In this study, we employed an optically pumped atomic magnetometer (OPAM) with a flux transformer (FT) for remote detection of MR signals. In this system, we examined the constraints on the bandwidth of the MR signals measurement. In addition, we simulated signal acquisition and reconstruction from the MR signals in ULF-MRI obtained by the SWIFT approach when the bandwidth was changed. As a result, we could confirm that $T_2$ relaxation and narrow inter-pixel bandwidth contributes causes aliasing of the reconstructed image for imaging of hyperpolarized xenon with SWIFT approach in ULF-MRI. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
ultra-low field MRI / hyperpolarized xenon, sweep imaging with Fourier transformation (SWIFT) / optically pumped atomic magnetometer (OPAM) / flux transformer (FT) / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 115, no. 383, MBE2015-80, pp. 101-106, Dec. 2015. |
Paper # |
MBE2015-80 |
Date of Issue |
2015-12-12 (MBE) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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MBE2015-80 |
Conference Information |
Committee |
MBE NC |
Conference Date |
2015-12-19 - 2015-12-19 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Nagoya Institute of Technology |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
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Paper Information |
Registration To |
MBE |
Conference Code |
2015-12-MBE-NC |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
MR signal detection of hyperpolarized xenon with atomic magnetometers in ultra-low field based on SWIFT approach |
Sub Title (in English) |
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ultra-low field MRI |
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hyperpolarized xenon, sweep imaging with Fourier transformation (SWIFT) |
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optically pumped atomic magnetometer (OPAM) |
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flux transformer (FT) |
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1st Author's Name |
Yuki Kaga |
1st Author's Affiliation |
Kyoto University (Kyoto Univ.) |
2nd Author's Name |
Takenori Oida |
2nd Author's Affiliation |
Kyoto University (Kyoto Univ.) |
3rd Author's Name |
Tetsuya Yamamoto |
3rd Author's Affiliation |
Kyoto University (Kyoto Univ.) |
4th Author's Name |
Tetsuo Kobayashi |
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Kyoto University (Kyoto Univ.) |
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Speaker |
Author-1 |
Date Time |
2015-12-19 09:50:00 |
Presentation Time |
25 minutes |
Registration for |
MBE |
Paper # |
MBE2015-80 |
Volume (vol) |
vol.115 |
Number (no) |
no.383 |
Page |
pp.101-106 |
#Pages |
6 |
Date of Issue |
2015-12-12 (MBE) |
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