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Paper Abstract and Keywords
Presentation 2009-01-19 13:30
[Poster Presentation] Quality Improvement of the Reconstruction Image on a PET System with Irregular Sensitivity Caused by Geometrical Arrangement
Shingo Yoshizawa, Takashi Obi, Hideaki Tashima, Masahiro Yamaguchi, Nagaaki Ohyama (Tokyo Inst. of Tech.) MI2008-92
Abstract (in Japanese) (See Japanese page) 
(in English) The conventional PET system has a symmetric configuration, however, for applying small animals it is important to increase gamma-ray detection sensitivity and we have to develop a new PET detector configuration which has asymmetric arrangement of detectors. But in that PET system, the irregularity of the detector sensitivities become large and using the MLEM method, the artifacts and the spatial dependent noise will occur in the PET images. On this report, we show a method to suppress the artifacts by controlling the difference of the convergence speed referred to the log-likelihood and a possibility of improving PET image quality in the computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) PET / Geometrical Arrangement of Detectors / Irregular Sensitivity / ML Method / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 385, MI2008-92, pp. 157-162, Jan. 2009.
Paper # MI2008-92 
Date of Issue 2009-01-12 (MI) 
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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Conference Information
Committee MI  
Conference Date 2009-01-19 - 2009-01-21 
Place (in Japanese) (See Japanese page) 
Place (in English) National Taiwan University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical Imaging 
Paper Information
Registration To MI 
Conference Code 2009-01-MI 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Quality Improvement of the Reconstruction Image on a PET System with Irregular Sensitivity Caused by Geometrical Arrangement 
Sub Title (in English)  
Keyword(1) PET  
Keyword(2) Geometrical Arrangement of Detectors  
Keyword(3) Irregular Sensitivity  
Keyword(4) ML Method  
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Keyword(6)  
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1st Author's Name Shingo Yoshizawa  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Takashi Obi  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Hideaki Tashima  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
4th Author's Name Masahiro Yamaguchi  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
5th Author's Name Nagaaki Ohyama  
5th Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2009-01-19 13:30:00 
Presentation Time 210 minutes 
Registration for MI 
Paper # MI2008-92 
Volume (vol) vol.108 
Number (no) no.385 
Page pp.157-162 
#Pages 6 
Date of Issue 2009-01-12 (MI) 

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