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Paper Abstract and Keywords
Presentation 2012-01-19 10:45
Improvement of RG/BH PET image quality using motion vector field estimated from inhalation and exhalation CT images
Masayuki Kanai (Chiba Univ.), Yoshitaka Tamai, Atsushi Sakohira, Kazuyoshi Suga (St. Hill Hospital), Hideaki Haneishi (Chiba Univ.) MI2011-80
Abstract (in Japanese) (See Japanese page) 
(in English) Lung motion due to respiration causes image degradation in medical imaging, especially in nuclear medicine which requires long acquisition time. We have developed a method for image correction between the respiration-gated (RG) PET images in different respiration phases or breath-hold (BH) PET images in inconsistent respiration phase. In the method, the RG or BH PET images in different respiration phase are deformed under two criteria; similarity of image density distribution and smoothness of estimated motion vector field (MVF). However, only these criteria may cause un-natural motion estimation of lung in case that the image contrast is low and thus the texture information doesn’t function for image registration. Recently, PET-CT scanners are getting popular. CT images offer high contrast anatomical images and thus it is easier to obtain accurate motion information from inhalation and exhalation CT images. In this paper, assuming the use of a PET-CT scanner, we add another criterion that is the similarity to the motion direction estimated from inhalation and exhalation CT images. The proposed method was applied to XCAT phantom image data and seven patients’ BH-PET image data. Successful registration results were obtained by the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) PET / CT / Deformation and summation / PET-CT scanner / Breath-hold / Respiratory-gated / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 389, MI2011-80, pp. 17-22, Jan. 2012.
Paper # MI2011-80 
Date of Issue 2012-01-12 (MI) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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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Conference Information
Committee MI  
Conference Date 2012-01-19 - 2012-01-20 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MI 
Conference Code 2012-01-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of RG/BH PET image quality using motion vector field estimated from inhalation and exhalation CT images 
Sub Title (in English)  
Keyword(1) PET  
Keyword(2) CT  
Keyword(3) Deformation and summation  
Keyword(4) PET-CT scanner  
Keyword(5) Breath-hold  
Keyword(6) Respiratory-gated  
Keyword(7)  
Keyword(8)  
1st Author's Name Masayuki Kanai  
1st Author's Affiliation Chiba University (Chiba Univ.)
2nd Author's Name Yoshitaka Tamai  
2nd Author's Affiliation Saint Hill Hospital (St. Hill Hospital)
3rd Author's Name Atsushi Sakohira  
3rd Author's Affiliation Saint Hill Hospital (St. Hill Hospital)
4th Author's Name Kazuyoshi Suga  
4th Author's Affiliation Saint Hill Hospital (St. Hill Hospital)
5th Author's Name Hideaki Haneishi  
5th Author's Affiliation Chiba University (Chiba Univ.)
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Speaker Author-1 
Date Time 2012-01-19 10:45:00 
Presentation Time 15 minutes 
Registration for MI 
Paper # MI2011-80 
Volume (vol) vol.111 
Number (no) no.389 
Page pp.17-22 
#Pages 6 
Date of Issue 2012-01-12 (MI) 

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