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Paper Abstract and Keywords
Presentation 2010-01-29 11:40
[Poster Presentation] Comparison of Inversion Algorithm for Magnetic Resonance Elastography -- Availability for Focused Acoustic Driver --
Hisayuki Miura, Mikio Suga (Chiba Univ.), Hiroshi Fujiwara (Kyoto Univ.), Takao Yamamoto (Gunma Univ.), Masaya Hirano (GE Healthcare Japan), Hiroo Ikehira, Takayuki Obata (National Inst. of Radiological Sci.) MI2009-142
Abstract (in Japanese) (See Japanese page) 
(in English) The stiffness of tissue is related to physiological and pathological state. Magnetic resonance elastography (MRE) is a technique that can noninvasively visualize shear waves patterns within tissue with a modified phase-contrast MR sequence. In order to generate shear waves in deep region of tissue, we have used a focused acoustic driver. The shear waves generated by the focused acoustic driver make complex shear waves in deep region. There are three types of inversion algorithms, local frequency estimation (LFE), direct inversion (DI) and integral type reconstruction formula (ITRF) which are applicable noisy shear wave images and estimate the shear modulus quantitatively. The purpose of this work is to show that the most suitable inversion algorithms for noisy complex shear wave images. From the results of the phantom study, we result that ITRF with integral type curl-operator is the most suitable inversion algorithms for the focused acoustic driver.
Keyword (in Japanese) (See Japanese page) 
(in English) magnetic resonance elastography (MRE) / MRI / viscoelasticity / inversion algorithms / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 407, MI2009-142, pp. 357-360, Jan. 2010.
Paper # MI2009-142 
Date of Issue 2010-01-21 (MI) 
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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee MI  
Conference Date 2010-01-28 - 2010-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Naha-Bunka-Tenbusu 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical Imaging 
Paper Information
Registration To MI 
Conference Code 2010-01-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Comparison of Inversion Algorithm for Magnetic Resonance Elastography 
Sub Title (in English) Availability for Focused Acoustic Driver 
Keyword(1) magnetic resonance elastography (MRE)  
Keyword(2) MRI  
Keyword(3) viscoelasticity  
Keyword(4) inversion algorithms  
1st Author's Name Hisayuki Miura  
1st Author's Affiliation Chiba University (Chiba Univ.)
2nd Author's Name Mikio Suga  
2nd Author's Affiliation Chiba University (Chiba Univ.)
3rd Author's Name Hiroshi Fujiwara  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Takao Yamamoto  
4th Author's Affiliation Gunma University (Gunma Univ.)
5th Author's Name Masaya Hirano  
5th Author's Affiliation GE Healthcare Japan (GE Healthcare Japan)
6th Author's Name Hiroo Ikehira  
6th Author's Affiliation National Institute of Radiological Sciences (National Inst. of Radiological Sci.)
7th Author's Name Takayuki Obata  
7th Author's Affiliation National Institute of Radiological Sciences (National Inst. of Radiological Sci.)
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Speaker Author-1 
Date Time 2010-01-29 11:40:00 
Presentation Time 30 minutes 
Registration for MI 
Paper # MI2009-142 
Volume (vol) vol.109 
Number (no) no.407 
Page pp.357-360 
Date of Issue 2010-01-21 (MI) 

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