講演抄録/キーワード |
講演名 |
2009-01-21 09:50
[ポスター講演]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) MI2008-167 |
抄録 |
(和) |
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. |
(英) |
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. |
キーワード |
(和) |
HIFU / zeroultrasound t-crossing tracking / noninvasive temperature estimation / / / / / |
(英) |
HIFU / zeroultrasound t-crossing tracking / noninvasive temperature estimation / / / / / |
文献情報 |
信学技報, vol. 108, no. 385, MI2008-167, pp. 487-492, 2009年1月. |
資料番号 |
MI2008-167 |
発行日 |
2009-01-12 (MI) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
MI2008-167 |
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