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Paper Abstract and Keywords
Presentation 2010-01-29 11:40
[Poster Presentation] Reduction of Radiation Dose in Computed Radiography Using Wavelet Transform
Haruyuki Watanabe, Du-Yih Tsai, Yongbum Lee, Eri Matsuyama (Niigata Univ.), Katsuyuki Kojima (Hamamatsu Univ.) MI2009-127
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we investigated the effect of the use of wavelet transform on dose reduction in computed radiography (CR). The physical properties of the processed CR images were measured using the modulation transfer function (MTF), noise power spectrum (NPS), contrast-to-noise ratio, and peak signal-to-noise ratio. Furthermore, visual evaluation was performed by Scheffe’s pair comparison method. Experimental results showed that sigmoid-type transfer curves for wavelet coefficient weighting adjustment could improve the MTF, and three soft-threshold methods could improve the NPS at all spatial frequency ranges. Moreover, our visual evaluation showed that an approximately 40% reduction in exposure dose might be achieved with the sigmoid-type in hip joint radiography.
Keyword (in Japanese) (See Japanese page) 
(in English) Wavelet Transform / Radiation dose / Image quality / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 407, MI2009-127, pp. 279-284, Jan. 2010.
Paper # MI2009-127 
Date of Issue 2010-01-21 (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)
Download PDF MI2009-127

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) Reduction of Radiation Dose in Computed Radiography Using Wavelet Transform 
Sub Title (in English)  
Keyword(1) Wavelet Transform  
Keyword(2) Radiation dose  
Keyword(3) Image quality  
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1st Author's Name Haruyuki Watanabe  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Du-Yih Tsai  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Yongbum Lee  
3rd Author's Affiliation Niigata University (Niigata Univ.)
4th Author's Name Eri Matsuyama  
4th Author's Affiliation Niigata University (Niigata Univ.)
5th Author's Name Katsuyuki Kojima  
5th Author's Affiliation Hamamatsu University (Hamamatsu Univ.)
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Speaker Author-1 
Date Time 2010-01-29 11:40:00 
Presentation Time 30 minutes 
Registration for MI 
Paper # MI2009-127 
Volume (vol) vol.109 
Number (no) no.407 
Page pp.279-284 
#Pages 6 
Date of Issue 2010-01-21 (MI) 

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