NDLI: Improved temperature imaging of focused ultrasound thermal therapy using a sigmoid model based cross-correlation algorithm

Content Provider	IEEE Xplore Digital Library
Author	Huang, S.-M. Liu, H.-L. Li, M.-L.
Copyright Year	2012
Description	Author affiliation: Department of Electrical Engineering, Chang Gung University, Taoyuan, Taiwan (Liu, H.-L.) \|\| Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan (Li, M.-L.) \|\| Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan (Huang, S.-M.)
Abstract	Focused ultrasound (FUS) thermal therapy relies on temperature imaging for treatment monitoring and guidance. Current ultrasonic temperature estimation mainly involves the detection of echo-time shifts using cross-correlation processing between segmented radio-frequency (RF) data pre- and post-FUS heating. Generally, a minimum RF data segment of around 6 wavelengths is required to obtain accurate echo-time shift estimates and mitigate artifacts. Shorter data segments are essential to retrieve better axial resolution in temperature image; however, shorter data segments generally lead to increased estimation errors. In this work, we propose a sigmoid model based cross-correlation algorithm to address this problem. First, cross-correlation processing with a large non-overlapping window (e.g., around 10 wavelengths) is applied to obtain coarse echo-time shift estimates between RF data pre- and post-FUS heating. According to the feature of the echo-time shift from FUS heating, a sigmoid model is adopted to fit the coarse estimates, and used as the initial estimates for the further cross-correlation processing with a smaller window (e.g., 2 wavelengths) which improves axial resolution and suppress artifacts while providing comparable noise properties to those obtained by the conventional method with a 6-wavelength window. The experimental results showed that this new method can provide accurate echo-time shift estimation and mitigate the artifacts while only requiring less than a 2-wavelength data segment. This work helps to improve axial resolution of the current ultrasonic temperature estimation used for guidance of the FUS thermal ablation procedure.
Starting Page	2766
Ending Page	2768
File Size	1261055
Page Count	3
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0693
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic imaging Estimation Radio frequency Acoustics Heating Medical treatment Mathematical model cross-correlation focused ultrasound thermal therapy temperature estimation sigmoid function
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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