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Paper Abstract and Keywords
Presentation 2009-01-21 09:50
[Poster Presentation] Temperature Monitoring Using Zero-crossing Tracking Technique During Focused Ultrasound Thermal Therapy
Kuen-Cheng Ju (I-Shou Univ.), Hao-Li Liu (Chang-Gung Univ.), Tzu-Ching Shih (China Medical Univ/China Medical University Hospital)
Abstract (in Japanese) (See Japanese page) 
(in English) This paper investigates the feasibility of using a zero-crossing tracking (ZCT) technique to monitor temperature changes during high intensity focused ultrasound (HIFU) thermal therapy. The ZCT technique tracks the shifts in the zero-crossing instants between the pre- and postheated A-lines to estimate the echoshifts caused by local temperature changes. Compared to the conventional cross-correlation (CCR) technique, ZCT does not require intensive computational loadings for correlation operations; hence, the computational efficiency could be improved. The parameters used, such as the size of the segment window, segment overlap and the window used to compute the echoshift gradient, could substantially affect the estimation results. With optimized parameters, the estimation errors for the peak temperature and the size of the hotspot could be less than 1「XC and 10%, respectively.
Keyword (in Japanese) (See Japanese page) 
(in English) HIFU / zeroultrasound t-crossing tracking / noninvasive temperature estimation / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 385, MI2008-167, pp. 487-492, Jan. 2009.
Paper # MI2008-167 
Date of Issue 2009-01-12 (MI) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

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 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Temperature Monitoring Using Zero-crossing Tracking Technique During Focused Ultrasound Thermal Therapy 
Sub Title (in English)  
Keyword(1) HIFU  
Keyword(2) zeroultrasound t-crossing tracking  
Keyword(3) noninvasive temperature estimation  
1st Author's Name Kuen-Cheng Ju  
1st Author's Affiliation I-Shou University, Taiwan (I-Shou Univ.)
2nd Author's Name Hao-Li Liu  
2nd Author's Affiliation Chang-Gung University, Taiwan (Chang-Gung Univ.)
3rd Author's Name Tzu-Ching Shih  
3rd Author's Affiliation China Medical University, Taiwan (China Medical Univ/China Medical University Hospital)
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Date Time 2009-01-21 09:50:00 
Presentation Time 140 
Registration for MI 
Paper # IEICE-MI2008-167 
Volume (vol) IEICE-108 
Number (no) no.385 
Page pp.487-492 
#Pages IEICE-6 
Date of Issue IEICE-MI-2009-01-12 

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