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Paper Abstract and Keywords
Presentation 2010-01-22 13:20
Evaluation of Magnetic Field Uniformity inside RF Coil for MRI System with no Lumped Circuit Elements
Takahiro Kawamura, Kazuyuki Saito, Masaharu Takahashi, Koichi Ito (Chiba Univ.) AP2009-175
Abstract (in Japanese) (See Japanese page) 
(in English) Currently, Magnetic Resonance Imaging (MRI) system which operates up to under 3 T is being used in clinical practice. In order to achieve the requirement of obtaining more high-quality images and short imaging time, devices utilize high magnetic field (>3 T) and high power electromagnetic (EM) wave pulse has been developed. The rise of the static magnetic field is proportional to the increase of the EM wave frequency which brings down issues of variation in capacitance used in the radio frequency (RF) coil for MRI system. In addition, increasing power causes problems of withstanding voltage and these approach leads to generation of nonuniform magnetic field inside the RF coil. In this report, birdcage coil for MRI system without the use of lumped circuit elements was proposed and S-parameters of the coil and magnetic field inside the coil were investigated. As a result, it was confirmed that the proposal coil has an equivalent performance to the conventional birdcage coil.
Keyword (in Japanese) (See Japanese page) 
(in English) Magnetic resonance imaging (MRI) / Finite-difference time-domain (FDTD) method / Birdcage coil / Magnetic field / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 372, AP2009-175, pp. 115-118, Jan. 2010.
Paper # AP2009-175 
Date of Issue 2010-01-14 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF AP2009-175

Conference Information
Committee AP  
Conference Date 2010-01-21 - 2010-01-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Yamaguchi University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) AP 
Paper Information
Registration To AP 
Conference Code 2010-01-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Magnetic Field Uniformity inside RF Coil for MRI System with no Lumped Circuit Elements 
Sub Title (in English)  
Keyword(1) Magnetic resonance imaging (MRI)  
Keyword(2) Finite-difference time-domain (FDTD) method  
Keyword(3) Birdcage coil  
Keyword(4) Magnetic field  
1st Author's Name Takahiro Kawamura  
1st Author's Affiliation Chiba University (Chiba Univ.)
2nd Author's Name Kazuyuki Saito  
2nd Author's Affiliation Chiba University (Chiba Univ.)
3rd Author's Name Masaharu Takahashi  
3rd Author's Affiliation Chiba University (Chiba Univ.)
4th Author's Name Koichi Ito  
4th Author's Affiliation Chiba University (Chiba Univ.)
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Date Time 2010-01-22 13:20:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2009-175 
Volume (vol) IEICE-109 
Number (no) no.372 
Page pp.115-118 
#Pages IEICE-4 
Date of Issue IEICE-AP-2010-01-14 

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